Exhibit 1.1


                          Alliance Medical Corporation



                                4,000,000 Shares



                                  Common Stock
                               ($0.001 Par Value)



                             UNDERWRITING AGREEMENT




________ __, 2001

                             UNDERWRITING AGREEMENT


                                                               ________ __, 2001



UBS Warburg LLC
RBC Dain Rauscher Inc.
SG Cowen Securities Corporation



      As representatives of the several Underwriters
      named in Schedule A hereto

c/o UBS Warburg LLC
299 Park Avenue
New York, New York  10171-0026


Ladies and Gentlemen:


            Alliance Medical Corporation, a Delaware corporation (the
"Company"), proposes to issue and sell to the Underwriters named in Schedule A
annexed hereto (the "Underwriters") an aggregate of 4,000,000 shares (the "Firm
Shares") of common stock, $0.001 par value per share, of the Company (the
"Common Stock"). In addition, solely for the purpose of covering
over-allotments, the Company proposes to grant to the Underwriters the option to
purchase from the Company up to an additional 600,000 shares of Common Stock
(the "Additional Shares"). The Firm Shares and the Additional Shares are
hereinafter collectively sometimes referred to as the "Shares." The Shares are
described in the Prospectus which is referred to below.





            The Company has filed, in accordance with the provisions of the
Securities Act of 1933, as amended, and the rules and regulations thereunder
(collectively, the "Act"), with the Securities and Exchange Commission (the
"Commission") a registration statement on Form S-1 (File No. 333-13844)
including a prospectus, relating to the Shares. The Company has furnished to
you, for use by the Underwriters and by dealers, copies of one or more
preliminary prospectuses (each thereof being herein called a "Preliminary
Prospectus") relating to the Shares. Except where the context otherwise
requires, the registration statement, as amended when it becomes effective,
including all documents filed as a part thereof, and including any information
contained in a prospectus subsequently filed with the Commission pursuant to
Rule 424(b) under the Act and deemed to be part of the registration statement at
the time of effectiveness pursuant to Rule 430(A) under the Act, and also
including any registration statement filed pursuant to Rule 462(b) under the Act
with respect to the offering contemplated by such registration statement (as so
amended), is herein called the "Registration Statement," and the prospectus, in
the form filed by the Company with the Commission pursuant to Rule 424(b) under
the Act on or before the second business day after the date hereof (or such
earlier time as may be required under the Act) or, if no such filing is
required, the form of final prospectus included in the Registration Statement at
the time the Registration Statement became effective, is herein called the
"Prospectus."

            The Company and the Underwriters agree as follows:

            1. Sale and Purchase. Upon the basis of the representations and
warranties and subject to the terms and conditions herein set forth, the Company
agrees to sell to the respective Underwriters and each of the Underwriters,
severally and not jointly, agrees to purchase from the Company the aggregate
number of Firm Shares set forth opposite the name of such Underwriter in
Schedule A attached hereto, in each case at a purchase price of $____ per Share.
The Company is advised by you that the Underwriters intend (i) to make a public
offering of their respective portions of the Firm Shares as soon after the
effective date of the Registration Statement as in your judgment is advisable
and (ii) initially to offer the Firm Shares upon the terms set forth in the
Prospectus. You may from time to time increase or decrease the public offering
price after the initial public offering to such extent as you may determine.

            In addition, the Company hereby grants to the several Underwriters
the option to purchase, and upon the basis of the representations and warranties
and subject to the terms and conditions herein set forth, the Underwriters shall
have the right to purchase, severally and not jointly, from the Company, ratably
in accordance with the number of Firm Shares to be purchased by each of them,
all or a portion of the Additional Shares as may be necessary to cover
over-allotments made in connection with the offering of the Firm Shares, at the
same purchase price per share to be paid by the Underwriters to the Company for
the Firm Shares. This option may be exercised by you on behalf of the several
Underwriters at any time and from time to time on or before the thirtieth (30th)
day following the date hereof, by written notice to the Company. Such notice
shall set forth the aggregate number of Additional Shares as to which the option
is being exercised and the date and time when the Additional Shares are to be
delivered (such date and time being herein referred to as the "additional time
of purchase");


                                       2

provided, however, that the additional time of purchase shall not be earlier
than the time of purchase (as defined below) nor earlier than the second
business day(1) after the date on which the option shall have been exercised nor
later than the tenth business day after the date on which the option shall have
been exercised. The number of Additional Shares to be sold to each Underwriter
shall be the number which bears the same proportion to the aggregate number of
Additional Shares being purchased as the number of Firm Shares set forth
opposite the name of such Underwriter on Schedule A hereto bears to the total
number of Firm Shares (subject, in each case, to such adjustment as you may
determine to eliminate fractional shares).

            2. Payment and Delivery. Payment of the purchase price for the Firm
Shares shall be made to the Company by wire transfer of Federal (same-day) funds
against delivery of the certificates for the Firm Shares to you through the
facilities of the Depository Trust Company ("DTC") for the respective accounts
of the Underwriters. Such payment and delivery shall be made at 10:00 A.M., New
York City time, on _________ __, 2001 (unless another time shall be agreed to by
you and the Company or unless postponed in accordance with the provisions of
Section 8 hereof). The time at which such payment and delivery are actually made
is hereinafter sometimes called the "time of purchase." Certificates for the
Firm Shares shall be delivered to you in definitive form registered in such
names and in such denominations as you shall specify on the second business day
preceding the time of purchase. For the purpose of expediting the checking and
packaging of the certificates for the Firm Shares by you, the Company agrees to
make such certificates available to you for such purpose at least one full
business day preceding the time of purchase.

            Payment of the purchase price for the Additional Shares shall be
made at the additional time of purchase in the same manner and at the same
office as the payment for the Firm Shares. Certificates for the Additional
Shares shall be delivered to you in definitive form registered in such names and
in such denominations as you shall specify no later than the second business day
preceding the additional time of purchase. For the purpose of expediting the
checking and packaging of the certificates for the Additional Shares by you, the
Company agrees to make such certificates available to you for such purpose at
least one full business day preceding the additional time of purchase.

            Deliveries of the documents described in Section 6 below with
respect to the purchase of the Shares shall be made at the offices of Dewey
Ballantine LLP, 1301 Avenue of the Americas, New York, New York at 9:00 A.M.,
New York City time, on the date of the closing of the purchase of the Firm
Shares or the Additional Shares, as the case may be.

            3. Representations and Warranties. The Company represents and
warrants to each of the Underwriters that:

            (a) This Agreement has been duly authorized, executed and delivered
      by the Company and is a legal, valid and binding agreement of the Company,
      enforceable against the Company in accordance with its terms.


- ------------------------------------

           (1) As used herein "business day" shall mean a day on which the New
York Stock Exchange is open for trading.

                                       3

               (b) The Shares have been duly and validly authorized and, when
issued and delivered against payment therefor as provided herein, will be duly
and validly issued, fully paid and non-assessable. The holders of the Shares
will not be subject to personal liability by reason of being such holders. The
certificates for the Shares are in due and proper form and conform in all
material respects to the requirements of the Delaware General Corporation Law.

               (c) No approval, authorization, consent or order of or filing
with any national, state or local governmental or regulatory commission, board,
body, authority or agency is required in connection with the execution, delivery
and performance by the Company of this Agreement, the issuance and sale of the
Shares contemplated hereby and by the Registration Statement, other than
registration of the Shares under the Act and under the Securities Exchange Act
of 1934, as amended, and the rules and regulations thereunder (collectively, the
"Exchange Act"), which have been or will be effected by the Company, and any
necessary qualification under the securities or blue sky laws of the various
jurisdictions in which the Shares are being offered by the Underwriters or under
the rules and regulations of the NASD.

            (d) The Company has not received, and has no notice of, any order of
the Commission preventing or suspending the use of any Preliminary Prospectus,
or instituting proceedings for that purpose, and each Preliminary Prospectus, at
the time of filing thereof, conformed in all material respects to the
requirements of the Act. When the Registration Statement became or becomes
effective, the Registration Statement and the Prospectus complied or will comply
in all material respects with the provisions of the Act, and the Registration
Statement did not or will not contain an untrue statement of a material fact or
omit to state a material fact required to be stated therein or necessary to make
the statements therein not misleading, and the Prospectus did not or will not
contain an untrue statement of a material fact or omit to state a material fact
required to be stated therein or necessary to make the statements therein, in
light of the circumstances under which they were made, not misleading and the
Prospectus, any Preliminary Prospectus and any supplement thereto or prospectus
wrapper prepared in connection therewith, at their respective times of issuance
and at the time of purchase and additional time of purchase, as the case may be,
complied and will comply in all material respects with any applicable laws or
regulations of jurisdictions in which the Prospectus and such preliminary
prospectus, as amended or supplemented, if applicable, are distributed in
connection with the offer and sale of the Shares; provided, however, that the
Company makes no representation or warranty with respect to any statement
contained in the Registration Statement or the Prospectus in reliance upon and
in conformity with information concerning the Underwriters and furnished in
writing by or on behalf of any Underwriter through you to the Company expressly
for use in the Registration Statement or the Prospectus. Neither the Company
nor, to the Company's knowledge, any of its affiliates (as defined in the Act)
has distributed directly or indirectly any offering material in connection with
the offering or sale of the Shares other than the Registration Statement, the
Preliminary Prospectus, the Prospectus or any other materials, if any, permitted
by the Act.


                                       4

            (e) The audited financial statements of the Company included in the
      Registration Statement and the Prospectus present fairly the financial
      position and results of operations of the Company as of the dates and for
      the periods indicated; such financial statements have been prepared in
      conformity with generally accepted accounting principles applied on a
      consistent basis during the periods involved; the pro forma financial data
      included in the Registration Statement and the Prospectus comply as to
      form in all material respects with the applicable accounting requirements
      of Regulation S-X of the Securities Act, and the pro forma adjustments
      have been properly applied to the historical amounts in the compilation of
      those statements; the other financial and statistical data set forth in
      the Registration Statement and the Prospectus are accurately presented and
      prepared on a basis consistent with such financial statements and the
      books and records of the Company; and there are no financial statements
      (historical or pro forma) that are required to be included in the
      Registration Statement and the Prospectus that are not included as
      required.

            (f) Each of Nelson Lambson & Co. PLC and Deloitte & Touche LLP,
      whose reports on the financial statements of the Company are filed with
      the Commission as part of the Registration Statement and Prospectus, are
      independent public accountants as required by the Act.

            (g) All legal or governmental proceedings, all statutes and
      regulations and all contracts, leases or documents of a character required
      to be described in the Registration Statement or the Prospectus or to be
      filed as an exhibit to the Registration Statement have been so described
      or filed as required. All statistical and market-related data included in
      the Prospectus are based on or derived from sources that the Company
      believes to be reliable and accurate, and the Company has obtained the
      written consent to the use of such data from such sources to the extent
      required.

            (h) Except as set forth in the Registration Statement and the
      Prospectus: (i) no person has the right, contractual or otherwise, to
      cause the Company to issue or sell to it, or register pursuant to the Act,
      any shares of capital stock or other equity interests; (ii) no person has
      any preemptive rights, co-sale rights, rights of first refusal or other
      rights to purchase any shares of Common Stock and (iii) no person has the
      right to act as an underwriter, or as a financial advisor to the Company,
      in connection with the offer and sale of the Shares. No person has the
      right, contractual or otherwise, to cause the Company to register under
      the Act any shares of capital stock or other equity interests as a result
      of the filing or effectiveness of the Registration Statement or the sale
      of the Shares as contemplated thereby.

            (i) Immediately after the issuance and sale of the Shares to the
      Underwriters, no shares of preferred stock of the Company shall be issued
      and outstanding, and no holder of any shares of capital stock, securities
      convertible into or exchangeable or exercisable for capital stock or
      options, warrants or other rights to purchase capital stock or any other
      securities of the Company shall have any existing or future right to
      acquire any shares of preferred stock of the Company.


                                       5

            (j) The Company is not, and after the offering and sale of the
      Shares, will not be, an "investment company" or an entity "controlled" by
      an "investment company," as such terms are defined in the Investment
      Company Act of 1940, as amended (the "Investment Company Act").

            (k) The Company has obtained for the benefit of the Underwriters the
      agreement (a "Lock-Up Agreement"), in the form set forth as Exhibit A
      hereto, of each of its officers and directors and each of the holders of
      the Outstanding Diluted Common Stock (as defined below). The Company has
      provided to UBSW and to Dewey Ballantine LLP, counsel for the
      Underwriters, a complete and accurate list of all securityholders of the
      Company and the number and type of securities held by each securityholder.
      The Company has provided to UBSW and to Dewey Ballantine LLP, counsel for
      the Underwriters, true, accurate and complete copies of all of the Lock-Up
      Agreements presently in effect or effected hereby. The Company hereby
      represents and warrants that it will not purport to release any of its
      officers, directors or other securityholders from any Lock-Up Agreements
      currently existing or hereafter effected without the prior written consent
      of UBSW. For the purposes of this Agreement, "Outstanding Diluted Common
      Stock" shall mean the outstanding shares of Common Stock and any shares of
      Common Stock issuable upon conversion, exercise or exchange of any
      outstanding securities, notes or other instruments (including options and
      warrants).

            (l) Neither the Company nor any of its affiliates has taken,
      directly or indirectly, any action designed to or which has constituted or
      which might reasonably be expected to cause or result, under the Exchange
      Act or otherwise, in stabilization or manipulation of the price of any
      security of the Company to facilitate the sale or resale of the Shares.

            (m) The Company has been duly organized and is validly existing as a
      corporation and is in good standing under the laws of the State of
      Delaware and has full power and authority to own, lease and operate its
      properties and conduct its business as described in the Registration
      Statement. The Company is duly qualified to do business as a foreign
      corporation and is in good standing in each jurisdiction in which the
      ownership or leasing of its properties or the conduct of its business
      requires such qualification, except where the failure to so qualify would
      not have a material adverse effect on the business, prospects, properties,
      condition (financial or otherwise) or results of operation of the Company
      and the Subsidiaries (as defined herein), taken as a whole (a "Material
      Adverse Effect").

            (n) The capital stock of the Company, including the Shares, conforms
      in all material respects to the description thereof contained in the
      Registration Statement and Prospectus. As of the date of this Agreement,
      the Company has an authorized and outstanding capital stock as set forth
      under the heading entitled "Actual" in the section of the Registration
      Statement and the Prospectus entitled "Capitalization" and, as of the time
      of purchase, and assuming the receipt and application of the net proceeds
      as described under the section of the Registration Statement and the
      Prospectus entitled "Use of proceeds," the Company shall have an
      authorized and outstanding capital stock as set forth under the heading
      entitled "Pro forma as adjusted" in the section of the Registration
      Statement and the Prospectus entitled "Capitalization." All of the
      outstanding shares of


                                       6

      capital stock of the Company have been duly and validly authorized and
      issued and are fully paid and non-assessable, have been issued in
      compliance with all federal and state securities laws and have not have
      been issued in violation of any preemptive right, resale right, right of
      first refusal or similar right. The shares of Common Stock issuable upon
      conversion of the outstanding preferred stock of the Company upon
      completion of the offering contemplated hereby have been duly and validly
      authorized and reserved for issuance, and upon issuance, they will be duly
      and validly issued and fully paid and non-assessable, will have been
      issued in compliance with all federal and state securities laws and will
      not have been issued in violation of any preemptive right, resale right,
      right of first refusal or similar right.

            (o) The Company does not have any subsidiaries (as defined in the
      Act) other than as listed in Schedule B annexed hereto (the
      "Subsidiaries"). The Company, either directly or through one of the
      Company's wholly-owned Subsidiaries, owns 100% of the outstanding capital
      stock of each of the Subsidiaries except Applied Medical Technologies,
      L.L.C., of which the Company, through one of its wholly-owned
      Subsidiaries, owns 72% of the outstanding capital stock. Other than the
      Subsidiaries, the Company does not own, directly or indirectly, any shares
      of stock or any other equity or long-term debt securities of any
      corporation or have any equity interest in any firm, partnership, limited
      liability company, joint venture, association or other entity except as
      described in the Registration Statement and the Prospectus. Complete and
      correct copies of the charter and bylaws and other organizational
      documents of the Company and each of the Subsidiaries and all amendments
      thereto have been delivered to you, and except as described in the
      Prospectus and set forth in the exhibits to the Registration Statement, no
      changes therein will be made subsequent to the date hereof and prior to
      the time of purchase or, if later, the additional time of purchase. Each
      of the Subsidiaries has been duly organized and is validly existing as a
      corporation and is in good standing under the laws of the jurisdiction of
      its incorporation and has full power and authority to own, lease and
      operate its properties and conduct its business. Each of the Subsidiaries
      is duly qualified to do business as a foreign corporation and is in good
      standing in each jurisdiction in which the ownership or leasing of its
      properties or the conduct of its business requires such qualification,
      except where the failure to so qualify would not have a Material Adverse
      Effect. All of the outstanding shares of capital stock of each of the
      Subsidiaries has been duly and validly authorized and issued and are fully
      paid and non-assessable and owned by the Company, free of any security
      interest, other encumbrance or adverse claims, have been issued in
      compliance with all federal and state securities laws and have not been
      issued in violation of any preemptive right, resale right, right of first
      refusal or similar right. No option, warrant or other rights to purchase,
      agreements or other obligations to issue or rights to convert any
      obligation into shares of capital stock or ownership interests in any of
      the Subsidiaries are outstanding.

            (p) Neither the Company nor any of the Subsidiaries has violated or
      is in violation of any federal, state, local or foreign law, ordinance,
      administrative or governmental rule or regulation applicable to the
      Company or any of the Subsidiaries or of any decree of any court or
      governmental agency or body having jurisdiction over the Company or any of
      the Subsidiaries, which violation could, individually or in the aggregate,
      have a Material Adverse Effect. Each of the Company and the Subsidiaries
      has all necessary


                                       7

      licenses, permits, franchises, authorizations, consents and approvals, and
      made all filings required under any federal, state, local or foreign law,
      regulation or rule, and has obtained all necessary authorizations,
      consents and approvals from other persons, in order to conduct its
      business; and neither the Company nor any of the Subsidiaries is in
      violation of, or in default under, any such license, permit, franchise,
      authorization, consent or approval, the effect of which could individually
      or in the aggregate have a Material Adverse Effect. Without limiting the
      generality of the foregoing, each of the Company and the Subsidiaries has
      operated and currently is in compliance in all material respects with all
      applicable U.S. Food and Drug Administration ("FDA") rules, regulations
      and policies, and all deficiencies identified by the FDA with respect to
      the Company or the Subsidiaries or their facilities, personnel or
      operations as a result of FDA inspections, audits or otherwise have been
      corrected.

            (q) The clinical, pre-clinical and other studies and tests conducted
      by or on behalf of or sponsored by the Company or the Subsidiaries or in
      which the Company or the Subsidiaries or the product candidates of the
      Company or the Subsidiaries have participated were and, if still pending,
      are being conducted in accordance with standard medical and scientific
      research procedures.

            (r) Neither the Company nor any of the Subsidiaries is in breach or
      violation of, or in default under (and no event has occurred which with
      notice, lapse of time or both would result in any breach or violation of,
      or constitute a default under), its charter or bylaws or other
      organizational documents or in the performance or observance of any
      obligation, agreement, covenant or condition contained in any indenture,
      mortgage, deed of trust, bank loan or credit agreement or other evidence
      of indebtedness, or any lease, contract or other agreement or instrument
      to which the Company or any of the Subsidiaries is a party or by which any
      of them or any of their properties is bound or affected, the effect of
      which could individually or in the aggregate have a Material Adverse
      Effect. The execution, delivery and performance of this Agreement and the
      issuance and sale of the Shares contemplated hereby and by the
      Registration Statement will not conflict with, or result in any breach or
      violation of or constitute a default under (nor constitute any event which
      with notice, lapse of time or both would result in any breach or violation
      of, or constitute a default under), any provisions of the charter or
      bylaws or other organizational documents of the Company or any of the
      Subsidiaries or under any provision of any license, permit, franchise,
      indenture, mortgage, deed of trust, bank loan or credit agreement or other
      evidence of indebtedness, or any lease, contract or other agreement or
      instrument to which the Company or any of the Subsidiaries is a party or
      by which any of them or their properties may be bound or affected, or
      under any federal, state, local or foreign law, regulation or rule or any
      decree, judgment or order applicable to the Company or any of the
      Subsidiaries, the result of which could individually or in the aggregate
      have a Material Adverse Effect; and the execution, delivery and
      performance of this Agreement and the issuance and sale of the Shares
      contemplated hereby and by the Registration Statement will not conflict
      with, or result in any breach or violation of, constitute a default under
      (nor constitute any event which with notice, lapse of time or both would
      result in any breach or violation of, or constitute a default under) or
      result in the creation or imposition of any lien, charge or encumbrance
      upon any property or assets of the Company or any of the Subsidiaries
      pursuant to any


                                       8

      indenture, mortgage, deed of trust, bank loan or credit agreement or other
      evidence of indebtedness, or any lease, contract or other agreement or
      instrument to which the Company or any of the Subsidiaries is a party or
      by which any of them or any of their properties is bound or affected, the
      result of which could individually or in the aggregate have a Material
      Adverse Effect.

            (s) Except as described in the Registration Statement and the
      Prospectus, there are no private or governmental actions, suits, claims,
      investigations or proceedings pending, threatened or, to the Company's
      knowledge, contemplated, to which the Company or any of the Subsidiaries
      or any of their directors or officers is subject or of which any of their
      properties is subject, whether at law, in equity or before or by any
      federal, state, local or foreign governmental or regulatory commission,
      board, body, authority or agency.

            (t) Except as described in the Registration Statement and the
      Prospectus, subsequent to the respective dates as of which information is
      given in the Registration Statement and the Prospectus, there has not been
      (i) any material adverse change, or any development involving a
      prospective material adverse change, in the business, prospects,
      properties, condition (financial or otherwise) or results of operations of
      the Company and the Subsidiaries, taken as a whole, (ii) any transaction
      that is material to the Company and the Subsidiaries, taken as a whole,
      (iii) the incurrence by the Company or any of the Subsidiaries of any
      obligation, direct or contingent, and whether or not in the ordinary
      course of business, which is material to the Company and the Subsidiaries,
      taken as a whole, (iv) any change in the capital stock or other equity
      interest or outstanding indebtedness of the Company or any of the
      Subsidiaries or (v) any dividend or distribution of any kind declared,
      paid or made on the capital stock or other equity interest of the Company
      or any of the Subsidiaries. Neither the Company nor any of the
      Subsidiaries has any contingent obligations that are material to the
      Company and the Subsidiaries, taken as a whole, which are not disclosed in
      the Registration Statement.

            (u) Each of the Company and the Subsidiaries owns or possesses those
      trademarks, trademark registrations, service marks, service mark
      registrations, trade names, patents, patent rights, copyrights, licenses,
      approvals, inventions, know-how (including trade secrets and other
      unpatented and/or unpatentable proprietary or confidential information,
      systems or procedures) and other similar rights or intellectual property
      described in the Prospectus as being owned or used by or licensed to the
      Company or the Subsidiaries or necessary for the conduct of their
      respective businesses as currently conducted (collectively, the
      "Intellectual Property"). Each of the Company and the Subsidiaries has
      taken all steps necessary to secure assignments of the Intellectual
      Property from their respective officers, employees, consultants and
      contractors. Except as set forth in the Prospectus, none of the technology
      employed by the Company or any of the Subsidiaries has been obtained or is
      being used by the Company or the Subsidiaries in violation of any
      contractual or fiduciary obligation binding on the Company or the
      Subsidiaries, their respective directors, executive officers, employees or
      consultants; and the Company has taken and will maintain reasonable
      measures to prevent the unauthorized dissemination or publication of its
      confidential information. Neither the Company nor any of the Subsidiaries
      has infringed, interfered with or misappropriated


                                       9

      any patents, patent rights, trade names, trademarks, copyrights or other
      intellectual property rights of others, which infringement, if the subject
      of any unfavorable decision, ruling or finding could, individually or in
      the aggregate, result in a material and adverse change in the business,
      prospects, properties, condition (financial or otherwise) or results of
      operations of the Company and the Subsidiaries, taken as a whole. Except
      as set forth in the Prospectus, there is no pending or, to the Company's
      knowledge, threatened private or governmental action, suit, proceeding or
      claim (i) challenging the rights of the Company or any of the Subsidiaries
      in or to any such Intellectual Property, (ii) challenging the validity or
      scope of, or any rights relating to, any such Intellectual Property of the
      Company or any of the Subsidiaries or (iii) alleging that the Company or
      any of the Subsidiaries infringes or otherwise violates, or would infringe
      or otherwise violate, any patent, trademark, copyright, trade secret or
      other proprietary rights of others; and the Company is unaware of any
      facts which would form a reasonable basis for any of the claims described
      in clauses (i), (ii) and (iii) above.

            (v) Each of the Company and the Subsidiaries has good and marketable
      title to all property (real and personal) described in the Prospectus as
      being owned by it, free and clear of all liens, claims, security interests
      or other encumbrances except such as are described in the Registration
      Statement and the Prospectus and except as would not individually or in
      the aggregate have a Material Adverse Effect. All the property held under
      lease by the Company or the Subsidiaries is held thereby under valid,
      subsisting and enforceable leases.

            (w) Each of the Company and the Subsidiaries is insured by insurers
      of recognized financial responsibility against such losses and risks and
      in such amount as are customary in the business in which it is engaged.
      All policies of insurance insuring the Company or the Subsidiaries or any
      of their businesses, assets, employees, officers and directors are in full
      force and effect, and each of the Company and the Subsidiaries is in
      compliance with the terms of such policies in all material respects. There
      are no claims by the Company or any of the Subsidiaries under any such
      policy or instrument as to which any insurance company is denying
      liability or defending under a reservation of rights clause.

            (x) Neither the Company nor any of the Subsidiaries has sent or
      received any notice of termination of any of the contracts or agreements
      referred to or described in, or filed as an exhibit to, the Registration
      Statement, and no such termination has been threatened by the Company or
      any of the Subsidiaries or any other party to any such contract or
      agreement.

            (y) Since the date of the latest audited financial statements
      included in the Prospectus, neither the Company nor any of the
      Subsidiaries has sustained any loss or interference with its business from
      fire, explosion, flood or other calamity, whether or not covered by
      insurance, or from any labor dispute or court or governmental action,
      order or decree, otherwise than as disclosed in the Prospectus or other
      than any loss or interference which could individually or in the aggregate
      have a Material Adverse Effect.

            (z) Each of the Company and the Subsidiaries maintains a system of
      internal accounting controls sufficient to provide reasonable assurances
      that (i) transactions are


                                       10

      executed in accordance with management's general or specific
      authorization; (ii) transactions are recorded as necessary to permit
      preparation of financial statements in conformity with generally accepted
      accounting principles and to maintain accountability for assets; (iii)
      access to assets is permitted only in accordance with management's general
      or specific authorization; and (iv) the recorded accountability for assets
      is compared with existing assets at reasonable intervals and appropriate
      action is taken with respect to any differences.

            (aa) Each of the Company and the Subsidiaries has filed all federal,
      state, local and foreign tax returns and tax forms required to be filed.
      Such returns and forms are complete and correct in all material respects,
      and all taxes shown by such returns or otherwise assessed that are due or
      payable have been paid, except such taxes as are being contested in good
      faith and as to which adequate reserves have been provided. All payroll
      withholdings required to be made by the Company and the Subsidiaries with
      respect to employees have been made. The charges, accruals and reserves on
      the books of the Company and the Subsidiaries in respect of any tax
      liability for any year not finally determined are adequate to meet any
      assessments or reassessments for additional taxes. There have been no tax
      deficiencies asserted and, to the Company's knowledge, no tax deficiency
      might be reasonably asserted or threatened against the Company or the
      Subsidiaries that could individually or in the aggregate have a Material
      Adverse Effect.

            (bb) Neither the Company nor any of the Subsidiaries has violated
      any foreign, federal, state or local law or regulation relating to the
      protection of human health and safety, the environment or hazardous or
      toxic substances or wastes, pollutants or contaminants, nor any federal or
      state law relating to discrimination in the hiring, promotion or pay of
      employees nor any applicable federal or state wages and hours laws, nor
      any provisions of the Employee Retirement Income Security Act or the rules
      and regulations promulgated thereunder, which individually or in the
      aggregate might result in a Material Adverse Effect.




            In addition, any certificate signed by any officer of the Company,
delivered to the Representatives or counsel for the Underwriters in connection
with the offering of the Shares shall be deemed to be a representation and
warranty by the Company, as to matters covered thereby, to each Underwriter.

            4. Certain Covenants. The Company hereby agrees:

            (a) to furnish such information as may be required and otherwise to
      cooperate in qualifying the Shares for offering and sale under the
      securities or blue sky laws of such


                                       11

      states as you may designate and to maintain such qualifications in effect
      so long as required for the distribution of the Shares; provided, however,
      that the Company shall not be required to qualify as a foreign corporation
      or to consent to the service of process under the laws of any such state
      (except service of process with respect to the offering and sale of the
      Shares); and to promptly advise you of the receipt of any notification
      with respect to the suspension of the qualification of the Shares for sale
      in any jurisdiction or the initiation or threatening of any proceeding for
      such purpose;

            (b) to make available to the Underwriters in New York City, as soon
      as practicable after the Registration Statement becomes effective, and
      thereafter from time to time to furnish to the Underwriters, as many
      copies of the Prospectus (or of the Prospectus as amended or supplemented
      if the Company shall have made any amendments or supplements thereto after
      the effective date of the Registration Statement) as the Underwriters may
      request for the purposes contemplated by the Act; and in case any
      Underwriter is required to deliver a prospectus beyond the nine-month
      period referred to in Section 10(a)(3) of the Act in connection with the
      sale of the Shares, the Company will prepare promptly upon request such
      amendment or amendments to the Registration Statement and such
      prospectuses as may be necessary to permit compliance with the
      requirements of Section 10(a)(3) of the Act;

            (c) to advise you promptly and (if requested by you) to confirm such
      advice in writing, (i) when the Registration Statement has become
      effective and when any post-effective amendment thereto becomes effective
      and (ii) if Rule 430A under the Act is used, when the Prospectus is filed
      with the Commission pursuant to Rule 424(b) under the Act (which the
      Company agrees to file in a timely manner under such Rules);

            (d) to advise you promptly, and to confirm such advice in writing,
      of any request by the Commission for amendments or supplements to the
      Registration Statement or Prospectus or for additional information with
      respect thereto, or of notice of institution of proceedings for, or the
      entry of a stop order suspending the effectiveness of the Registration
      Statement and, if the Commission should enter a stop order suspending the
      effectiveness of the Registration Statement, to use its best efforts to
      obtain the lifting or removal of such order as soon as possible; to advise
      you promptly of any proposal to amend or supplement the Registration
      Statement or Prospectus and to file no such amendment or supplement to
      which you shall object in writing;

            (e) subject to Section 4(o) hereof, to file promptly all reports and
      any definitive proxy or information statement required to be filed by the
      Company with the Commission in order to comply with the Exchange Act
      subsequent to the date of the Prospectus and for so long as the delivery
      of a prospectus is required in connection with the offering or sale of the
      Shares, and to promptly notify you of such filing;

            (f) if necessary or appropriate, to file in a timely fashion a
      registration statement pursuant to Rule 462(b) under the Act;

            (g) to furnish to you and, upon request, to each of the other
      Underwriters for a period of five (5) years from the date of this
      Agreement (i) copies of any reports or other


                                       12

      communications which the Company shall send to its stockholders or shall
      from time to time publish or publicly disseminate, (ii) copies of all
      annual, quarterly and current reports filed with the Commission on Forms
      10-K, 10-Q and 8-K, or such other similar form as may be designated by the
      Commission, (iii) copies of documents or reports filed with any national
      securities exchange on which any class of securities of the Company is
      listed and (iv) such other information as you may reasonably request
      regarding the Company or the Subsidiaries as soon as such communications,
      documents or information becomes available;

            (h) to advise the Underwriters promptly of the occurrence of any
      event known to the Company within the time during which a Prospectus
      relating to the Shares is required to be delivered under the Act which
      would require the making of any change in the Prospectus then being used
      so that the Prospectus would not include an untrue statement of a material
      fact or omit to state a material fact necessary to make the statements
      therein, in the light of the circumstances under which they are made, not
      misleading, and, during such time, to prepare, file (subject to Section
      4(d) hereof) and furnish promptly to the underwriters, at the Company's
      expense, such amendments or supplements to such Prospectus as may be
      necessary to reflect any such change and to furnish you a copy of such
      proposed amendment or supplement before filing any such amendment or
      supplement with the Commission;

            (i) to make generally available to its securityholders, and to
      deliver to you, as soon as practicable an earnings statement of the
      Company (which will satisfy the provisions of Section 11(a) of the Act)
      covering a period of twelve (12) months beginning after the effective date
      of the Registration Statement (as defined in Rule 158(c) of the Act) and
      ending not later than fifteen (15) months thereafter;

            (j) to furnish to its stockholders as soon as practicable after the
      end of each fiscal year an annual report (including a balance sheet and
      statements of income, stockholders' equity and cash flow of the Company
      for such fiscal year, accompanied by a copy of the certificate or report
      thereon of nationally recognized independent certified public
      accountants);

            (k) to furnish to you such number of conformed copies of the
      Registration Statement, as initially filed with the Commission, and of all
      amendments thereto (including all exhibits thereto) as you shall
      reasonably request;

            (l) to furnish to you as early as practicable prior to the time of
      purchase and the additional time of purchase, as the case may be, but not
      later than two (2) business days prior thereto, a copy of the latest
      available quarterly or monthly unaudited interim consolidated financial
      statements of the Company and the Subsidiaries, which have been read by
      the Company's independent certified public accountants, as stated in their
      letter to be furnished pursuant to Section 6(d) hereof;

            (m) to apply the net proceeds from the sale of the Shares in the
      manner set forth under the caption "Use of proceeds" in the Prospectus;


                                       13


            (n) to pay all costs, expenses, fees and taxes in connection with
      (i) the preparation and filing of the Registration Statement, each
      Preliminary Prospectus, the Prospectus, and any amendments or supplements
      thereto, and the printing and furnishing of copies of each thereof to the
      Underwriters and to dealers (including costs of mailing and shipment) as
      provided by Sections 4(b) and 4(k) and otherwise herein, (ii) the
      registration, issue, sale and delivery of the Shares, (iii) the producing,
      word processing and/or printing of this Agreement, any agreement among
      underwriters, any dealer agreements, any Powers of Attorney and any
      closing documents (including compilations thereof) and the reproduction
      and/or printing and furnishing of copies of each thereof to the
      Underwriters and (except closing documents) to dealers (including costs of
      mailing and shipment), (iv) the qualification of the Shares for offering
      and sale under state laws and the determination of their eligibility for
      investment under state law as aforesaid (including the reasonable legal
      fees and filing fees and other disbursements of counsel for the
      Underwriters) and the printing and furnishing of copies of any blue sky
      surveys or legal investment surveys to the Underwriters and to dealers,
      (v) any listing of the Shares on any securities exchange or qualification
      of the Shares for quotation on the National Association of Securities
      Dealers Automated Quotation National Market System ("NASDAQ") and any
      registration thereof under the Exchange Act, (vi) the review of the
      public offering of the Shares by the NASD, including the associated filing
      fees and the reasonable fees and disbursements of counsel for the
      Underwriters, (vii) the costs and expenses of the Company relating to
      presentations or meetings undertaken in connection with the marketing of
      the offer and sale of the Shares to prospective investors and the
      Representatives' sales forces, including, without limitation, expenses
      associated with the production of road show slides and graphics, fees and
      expenses of any consultants engaged in connection with the road show
      presentations, travel, lodging and other expenses incurred by the officers
      of the Company and any such consultants and the cost of any aircraft
      chartered in connection with the road show and (viii) the performance of
      the Company's other obligations hereunder;


            (o) to furnish to you, before filing with the Commission subsequent
      to the effective date of the Registration Statement and during the period
      referred to in Section 4(h) hereof, a copy of any document proposed to be
      filed pursuant to Section 13, 14 or 15(d) of the Exchange Act;

            (p) not to sell, offer to sell, contract to sell, hypothecate,
      pledge, grant any option to sell or otherwise dispose of, directly or
      indirectly, any shares of Common Stock or securities convertible into or
      exchangeable or exercisable for Common Stock or options, warrants or other
      rights to purchase Common Stock or any other shares of the Company that
      are substantially similar to Common Stock or file a registration statement
      under the Act relating to the offer and sale of any shares of Common Stock
      or securities convertible into or exercisable or exchangeable for Common
      Stock or options, warrants or other rights to purchase Common Stock or any
      other shares of the Company that are substantially similar to Common Stock
      for a period of one hundred and eighty (180) days after the date hereof
      (the "Lock-up Period"), without the prior written consent of UBSW,


                                       14

      except for (i) the registration of the Shares and the sales to the
      Underwriters pursuant to this Agreement, (ii) issuances of Common Stock
      upon the exercise of outstanding options or warrants as disclosed in the
      Registration Statement and the Prospectus to persons who have entered into
      Lock-Up Agreements with the Underwriters and (iii) the issuance of
      employee stock options not exercisable during the Lock-up Period pursuant
      to stock option plans described in the Registration Statement and the
      Prospectus; and

            (q) to use its best efforts to cause the Common Stock to be listed
      for quotation on the Nasdaq National Market.

            5. Reimbursement of Underwriters' Expenses. The Company agrees that
if the Shares are not delivered for any reason other than the termination of
this Agreement pursuant to subsections (ii), (iii) or (iv) of the second
paragraph of Section 7 hereof or the last paragraph of Section 8 hereof or the
default by one or more of the Underwriters in its or their respective
obligations hereunder, it shall, in addition to paying the amounts described in
Section 4(n) hereof, reimburse the Underwriters for all of the out-of-pocket
expenses actually incurred by the Underwriters, including the reasonable fees
and disbursements of their counsel.

            6. Conditions of Underwriters' Obligations. The several obligations
of the Underwriters hereunder are subject to the accuracy of the representations
and warranties of the Company on the date hereof and at the time of purchase as
if made at the time of purchase (and the several obligations of the Underwriters
at the additional time of purchase are subject to the accuracy of the
representations and warranties of the Company on the date hereof and at the time
of purchase (unless previously waived) and at the additional time of purchase,
as the case may be, as if made at such time), the timely performance by the
Company of its obligations hereunder and to the following additional conditions
precedent:

            (a) The Company shall furnish to you at the time of purchase and at
      the additional time of purchase, as the case may be, the opinion of Snell
      & Wilmer L.L.P., counsel for the Company, addressed to the Underwriters,
      and dated the time of purchase or the additional time of purchase, as the
      case may be, with reproduced copies for each of the other Underwriters and
      in form reasonably satisfactory to Dewey Ballantine LLP, counsel for the
      Underwriters, stating that:

                  (i) the Company has been duly incorporated and is validly
            existing as a corporation and is in good standing under the laws of
            the State of Delaware and has full power and authority to own, lease
            and operate its properties and conduct its business as described in
            the Registration Statement and the Prospectus, to execute and
            deliver this Agreement and to issue, sell and deliver the Shares as
            herein contemplated;

                  (ii) each of the Subsidiaries has been duly incorporated and
            is validly existing as a corporation and is in good standing under
            the laws of its jurisdiction of incorporation and has full power and
            authority to own, lease and operate its properties and conduct its
            business as described in the Registration Statement and the
            Prospectus;


                                       15

                  (iii) each of the Company and the Subsidiaries is duly
            qualified to do business as a foreign corporation and is in good
            standing in each jurisdiction in which the ownership or leasing of
            its properties or the conduct of its business requires such
            qualification, except where the failure to so qualify would not have
            a Material Adverse Effect;

                  (iv) this Agreement has been duly authorized, executed and
            delivered by the Company;

                  (v) the Shares have been duly authorized and, when issued and
            delivered to and paid for by the Underwriters, will be validly
            issued, fully paid and non-assessable;

                  (vi) the Company has authorized and outstanding shares of
            capital stock as set forth in the Registration Statement and the
            Prospectus; the outstanding shares of capital stock of the Company
            (A) have been duly and validly authorized and issued and are fully
            paid and non-assessable, (B) are free of any preemptive rights,
            resale rights, rights of first refusal and similar rights under the
            Delaware General Corporation Law or under any contract, agreement or
            instrument described in or filed as an exhibit to the Registration
            Statement or otherwise known to such counsel and (C) to such
            counsel's knowledge, were issued in compliance with all applicable
            federal and state securities laws; the Shares when issued will be
            free of any preemptive rights, resale rights, rights of first
            refusal and similar rights under the Delaware General Corporation
            Law or the charter or bylaws or other organizational documents of
            the Company or under any contract, agreement or instrument known to
            such counsel, and the holders of the Shares will not be subject to
            personal liability by reason of being such holders; the certificates
            for the Shares are in due and proper form and conform in all
            material respects to the requirements of the Delaware General
            Corporation Law;

                  (vii) all of the outstanding shares of capital stock of each
            of the Subsidiaries have been duly authorized and validly issued,
            are fully paid and non-assessable, are owned of record by the
            Company, are not subject to any perfected security interest or, to
            such counsel's knowledge, any other encumbrance or adverse claim
            and, to such counsel's knowledge, have been issued and sold in
            compliance with all applicable federal and state securities laws; to
            such counsel's knowledge, no options, warrants or other rights to
            purchase, agreements or other obligations to issue or other rights
            to convert any obligation into shares of capital stock or ownership
            interests in any of the Subsidiaries are outstanding.

                  (viii) the capital stock of the Company, including the Shares,
            conforms as to legal matters to the description thereof contained in
            the Registration Statement and Prospectus;

                  (ix) the Registration Statement and the Prospectus (except as
            to the financial statements and schedules and other financial and
            statistical data


                                       16

            contained therein, as to which such counsel need express no opinion)
            comply as to form in all material respects with the requirements of
            the Act;

                  (x) the Registration Statement has become effective under the
            Act and, to such counsel's knowledge, no stop order proceedings with
            respect thereto are pending or threatened under the Act and any
            required filing of the Prospectus, and any supplement thereto
            pursuant to Rule 424 under the Act, has been made in the manner and
            within the time period required by such Rule 424;

                  (xi) no approval, authorization, consent or order of or filing
            with any national, state or local governmental or regulatory
            commission, board, body, authority or agency is required in
            connection with the execution, delivery and performance of this
            Agreement, the issuance and sale of the Shares and the consummation
            of the transactions contemplated hereby and by the Registration
            Statement, other than those that have been obtained under the Act,
            the Exchange Act and the rules of the Nasdaq National Market and
            other than any necessary qualification under the state securities or
            blue sky laws of the various jurisdictions in which the Shares are
            being offered by the Underwriters or any necessary approval of the
            Corporate Financing Department of NASD Regulation, Inc., as to which
            such qualification and approval such counsel need express no
            opinion;

                  (xii) the execution, delivery and performance of this
            Agreement by the Company and the transactions contemplated hereby
            and by the Registration Statement do not and will not conflict with,
            or result in any breach or violation of, or constitute a default
            under (nor constitute any event which with notice, lapse of time, or
            both, would result in any breach or violation of, or constitute a
            default under) or result in the creation or imposition of any lien,
            charge or encumbrance upon any property or assets of the Company or
            any of the Subsidiaries pursuant to (A) any provision of the charter
            or bylaws or other organizational documents of the Company or any of
            the Subsidiaries, (B) any provision of any license, permit,
            franchise, indenture, mortgage, deed of trust, note, bank loan or
            credit agreement or other evidence of indebtedness, or any lease,
            contract or other agreement or instrument filed as an exhibit to the
            Registration Statement or otherwise known to such counsel issued to
            the Company or any of the Subsidiaries, or to which the Company or
            any of the Subsidiaries is a party or by which any of them may be
            bound or affected, or to which any of the property or assets of the
            Company or any of the Subsidiaries is subject or may be bound or
            affected, (C) any federal, state, local or foreign law, regulation
            or rule or (D) any decree, judgment or order applicable to the
            Company or any of the Subsidiaries, in each case known to such
            counsel;

                  (xiii) to such counsel's knowledge, neither the Company nor
            any of the Subsidiaries is in violation of its charter or bylaws or
            other organizational documents, and neither the Company nor any of
            the Subsidiaries is in breach or violation of or in default under
            (nor has any event occurred which with notice, lapse of time, or
            both would result in any breach or violation of, or constitute a
            default under), any license, permit, franchise, indenture, mortgage,
            deed of trust,


                                       17

            bank loan or credit agreement or other evidence of indebtedness, or
            any lease, contract or other agreement or instrument to which the
            Company or any of the Subsidiaries is or was a party or by which it
            or its properties may be bound or affected or in violation of any
            federal, state, local or foreign law, regulation or rule or any
            decree, judgment or order applicable to the Company or any of the
            Subsidiaries, the effect of which would individually or in the
            aggregate have a Material Adverse Effect;

                  (xiv) to such counsel's knowledge, there are no contracts,
            licenses, agreements, leases or other documents of a character which
            are required to be filed as exhibits to the Registration Statement
            or to be described in the Prospectus which have not been so filed or
            described;

                  (xv) to such counsel's knowledge, there are no private or
            governmental actions, suits, claims, investigations or proceedings
            pending, threatened or contemplated to which the Company or the
            Subsidiaries or any of their directors or officers is subject or of
            which any of their properties is subject, whether at law, in equity
            or before or by any federal, state, local or foreign governmental or
            regulatory commission, board, body, authority or agency which are
            required to be described in the Prospectus but are not so described;

                  (xvi) the Company is not, and after the offering and sale of
            the Shares, will not be, an "investment company" or an entity
            controlled by an "investment company," as such term is defined in
            the Investment Company Act;

                  (xvii) those statements in the Prospectus that are
            descriptions of contracts, agreements or other legal documents or of
            legal proceedings, or refer to statements of law or legal
            conclusions, are accurate in all material respects and present
            fairly the information required to be shown; and

                  (xviii) no person has the right, pursuant to the terms of any
            contract, agreement or other instrument described in or filed as an
            exhibit to the Registration Statement or otherwise known to such
            counsel, to cause the Company to register under the Act any shares
            of capital stock or other equity interests as a result of the filing
            or effectiveness of the Registration Statement or the sale of the
            Shares as contemplated hereby; and to such counsel's knowledge,
            except as described in the Registration Statement and Prospectus, no
            person is entitled to registration rights with respect to shares of
            capital stock or other securities of the Company.

            In addition, such counsel shall state that it has participated in
conferences with officers and other representatives of the Company,
representatives of the independent public accountants of the Company and
representatives of the Underwriters at which the contents of the Registration
Statement and Prospectus were discussed and, although such counsel is not
passing upon and does not assume responsibility for the accuracy, completeness
or fairness of the statements contained in the Registration Statement or
Prospectus (except as and to the extent stated in subparagraphs (vi), (viii) and
(xvii) above), on the basis of the foregoing nothing has


                                       18

come to the attention of such counsel that causes such counsel to believe that
the Registration Statement or any amendment thereto at the time such
Registration Statement or amendment became effective contained an untrue
statement of a material fact or omitted to state a material fact required to be
stated therein or necessary to make the statements therein not misleading, or
that the Prospectus or any supplement thereto at the date of such Prospectus or
such supplement, and at all times up to and including the time of purchase or
additional time of purchase, as the case may be, contained an untrue statement
of a material fact or omitted to state a material fact required to be stated
therein or necessary to make the statements therein, in light of the
circumstances under which they were made, not misleading (it being understood
that such counsel need express no opinion with respect to the financial
statements and schedules and other financial and statistical data included in
the Registration Statement or Prospectus).

            (b) You shall have received at the time of purchase and at the
      additional time of purchase, as the case may be, the opinion of Covington
      & Burling, regulatory counsel to the Company, dated the time of purchase
      or the additional time of purchase, as the case may be, with reproduced
      copies for each of the other Underwriters and in form reasonably
      satisfactory to Dewey Ballantine LLP, counsel for the Underwriters,
      stating that the statements in the Registration Statement and the
      Prospectus referencing regulatory matters, insofar as such statements
      constitute summaries of food and drug regulatory matters with respect to
      the Company, as of the date of the Registration Statement and the
      Prospectus and as of the date of such opinion, are in all material
      respects accurate and complete statements or summaries of the matters
      therein set forth; and nothing has come to such counsel's attention that
      causes such counsel to believe that the above-described portions of the
      Registration Statement and the Prospectus, at the date of the Registration
      Statement and the Prospectus or at the date of such opinion, contained or
      contains an untrue statement of material fact or omitted or omits to state
      a material fact required to be stated therein or necessary to make the
      statements therein, in light of the circumstances under which they were
      made, not misleading.

            (c) You shall have received at the time of purchase and at the
      additional time of purchase, as the case may be, the favorable opinion of
      Dewey Ballantine LLP, counsel for the Underwriters, dated the time of
      purchase or the additional time of purchase, as the case may be, with
      respect to the issuance and sale of the Shares by the Company, the
      Registration Statement, the Prospectus (together with any supplement
      thereto) and such other related matters as the Underwriters may require.

            (d) You shall have received from each of Nelson Lambson & Co. PLC
      and Deloitte & Touche LLP, letters dated, respectively, the date of this
      Agreement and the time of purchase and additional time of purchase, as the
      case may be, and addressed to the Underwriters (with reproduced copies for
      each of the Underwriters) in the forms heretofore approved by Dewey
      Ballantine LLP, counsel for the Underwriters.

            (e) No amendment or supplement to the Registration Statement or
      Prospectus shall be filed prior to the time the Registration Statement
      becomes effective to which you object in writing.


                                       19

            (f) The Registration Statement shall become effective, or if Rule
      430A under the Act is used, the Prospectus shall have been filed with the
      Commission pursuant to Rule 424(b) under the Act, at or before 5:30 P.M.,
      New York City time, on the date of this Agreement, unless a later time
      (but not later than 5:30 P.M., New York City time, on the second full
      business day after the date of this Agreement) shall be agreed to by the
      Company and you in writing or by telephone, confirmed in writing;
      provided, however, that the Company and you and any group of Underwriters,
      including you, who have agreed hereunder to purchase in the aggregate at
      least fifty percent (50%) of the Firm Shares may from time to time agree
      on a later date.

            (g) Prior to the time of purchase or the additional time of
      purchase, as the case may be, (i) no stop order with respect to the
      effectiveness of the Registration Statement shall have been issued under
      the Act or proceedings initiated under Section 8(d) or 8(e) of the Act;
      (ii) the Registration Statement and all amendments thereto, or
      modifications thereof, if any, shall not contain an untrue statement of a
      material fact or omit to state a material fact required to be stated
      therein or necessary to make the statements therein not misleading; and
      (iii) the Prospectus and all amendments or supplements thereto, or
      modifications thereof, if any, shall not contain an untrue statement of a
      material fact or omit to state a material fact required to be stated
      therein or necessary to make the statements therein, in the light of the
      circumstances under which they are made, not misleading.

            (h) Between the time of execution of this Agreement and the time of
      purchase or the additional time of purchase, as the case may be, (i) no
      material and adverse change, or any development involving a prospective
      material and adverse change (other than as specifically identified in the
      Registration Statement and Prospectus), in the business, prospects,
      properties, condition (financial or otherwise) or results of operations of
      the Company and the Subsidiaries, taken as whole, shall occur or become
      known and (ii) no transaction which is material and unfavorable to the
      Company shall have been entered into by the Company or any of the
      Subsidiaries.

            (i) The Company will, at the time of purchase or additional time of
      purchase, as the case may be, deliver to you a certificate of its
      President and its Chief Financial Officer to the effect that the
      representations and warranties of the Company as set forth in this
      Agreement are true and correct as of each such date, that the Company has
      performed such of its obligations under this Agreement as are to be
      performed at or before the time of purchase and at or before the
      additional time of purchase, as the case may be, and the conditions set
      forth in paragraphs (f), (g) and (h) of this Section 6 have been met.

            (j) You shall have received signed Lock-Up Agreements, dated the
      date of this Agreement, from each of the persons described in Section 3(k)
      hereof.

            (k) The Company shall have furnished to you such other documents and
      certificates as to the accuracy and completeness of any statement in the
      Registration Statement and the Prospectus as of the time of purchase and
      the additional time of purchase, as the case may be, as you may reasonably
      request.


                                       20

            (l) The Shares shall have been approved for listing for quotation on
      the Nasdaq National Market, subject only to notice of issuance at or prior
      to the time of purchase or the additional time of purchase, as the case
      may be.

            7. Effective Date of Agreement; Termination. This Agreement shall
become effective (i) if Rule 430A under the Act is not used, when you shall have
received notification of the effectiveness of the Registration Statement, or
(ii) if Rule 430A under the Act is used, when the parties hereto have executed
and delivered this Agreement.

            The obligations of the several Underwriters hereunder shall be
subject to termination in the absolute discretion of you or any group of
Underwriters (which may include you) which has agreed to purchase in the
aggregate at least fifty percent (50%) of the Firm Shares, (i) if, since the
time of execution of this Agreement or the respective dates as of which
information is given in the Registration Statement and Prospectus, there has
been any material adverse change, or any development involving a prospective
material adverse change (other than as specifically identified in the
Registration Statement and Prospectus) in the business, prospects, properties,
condition (financial or otherwise) or results of operations of the Company and
the Subsidiaries, taken as a whole, which would, in your judgment or in the
judgment of such group of Underwriters, make it impracticable to market the
Shares, or (ii) if, at any time prior to the time of purchase or, with respect
to the purchase of any Additional Shares, the additional time of purchase, as
the case may be, trading in securities on the New York Stock Exchange, the
American Stock Exchange or the Nasdaq National Market shall have been suspended
or limitations or minimum prices shall have been established on the New York
Stock Exchange, the American Stock Exchange or the Nasdaq National Market, or
(iii) if a banking moratorium shall have been declared either by the United
States or New York State authorities, or (iv) if the United States shall have
declared war in accordance with its constitutional processes or there shall have
occurred any material outbreak or escalation of hostilities or other national or
international calamity or crisis of such magnitude in its effect on the
financial markets of the United States as, in your judgment or in the judgment
of such group of Underwriters, to make it impracticable to market the Shares.

            If you or any group of Underwriters elects to terminate this
Agreement as provided in this Section 7, the Company and each other Underwriter
shall be notified promptly by letter or telegram.

            If the sale to the Underwriters of the Shares, as contemplated by
this Agreement, is not carried out by the Underwriters for any reason permitted
under this Agreement or if such sale is not carried out because the Company
shall be unable to comply with any of the terms of this Agreement, the Company
shall not be under any obligation or liability under this Agreement (except to
the extent provided in Sections 4(n), 5 and 9 hereof), and the Underwriters
shall be under no obligation or liability to the Company under this Agreement
(except to the extent provided in Section 9 hereof) or to one another hereunder.

            8. Increase in Underwriters' Commitments. Subject to Sections 6 and
7, if any Underwriter shall default in its obligation to take up and pay for the
Firm Shares to be purchased by it hereunder (otherwise than for a reason
sufficient to justify the termination of this Agreement under the provisions of
Section 7 hereof) and if the number of Firm Shares which all


                                       21

Underwriters so defaulting shall have agreed but failed to take up and pay for
does not exceed ten percent (10%) of the total number of Firm Shares, the
non-defaulting Underwriters shall take up and pay for (in addition to the
aggregate number of Firm Shares they are obligated to purchase pursuant to
Section 1 hereof) the number of Firm Shares agreed to be purchased by all such
defaulting Underwriters, as hereinafter provided. Such Shares shall be taken up
and paid for by such non-defaulting Underwriter or Underwriters in such amount
or amounts as you may designate with the consent of each Underwriter so
designated or, in the event no such designation is made, such Shares shall be
taken up and paid for by all non-defaulting Underwriters pro rata in proportion
to the aggregate number of Firm Shares set opposite the names of such
non-defaulting Underwriters in Schedule A.

            Without relieving any defaulting Underwriter from its obligations
hereunder, the Company agrees with the non-defaulting Underwriters that it will
not sell any Firm Shares hereunder unless all of the Firm Shares are purchased
by the Underwriters (or by substituted Underwriters selected by you with the
approval of the Company or selected by the Company with your approval).

            If a new Underwriter or Underwriters are substituted by the
Underwriters or by the Company for a defaulting Underwriter or Underwriters in
accordance with the foregoing provision, the Company or you shall have the right
to postpone the time of purchase for a period not exceeding five (5) business
days in order that any necessary changes in the Registration Statement and
Prospectus and other documents may be effected.

            The term Underwriter as used in this Agreement shall refer to and
include any Underwriter substituted under this Section 8 with like effect as if
such substituted Underwriter had originally been named in Schedule A.

            If the aggregate number of Shares which the defaulting Underwriter
or Underwriters agreed to purchase exceeds ten percent (10%) of the total number
of Shares which all Underwriters agreed to purchase hereunder, and if neither
the non-defaulting Underwriters nor the Company shall make arrangements within
the five (5) business day period stated above for the purchase of all the Shares
which the defaulting Underwriter or Underwriters agreed to purchase hereunder,
this Agreement shall be terminated without further act or deed and without any
liability on the part of the Company to any non-defaulting Underwriter and
without any liability on the part of any non-defaulting Underwriter to the
Company. Nothing in this paragraph, and no action taken hereunder, shall relieve
any defaulting Underwriter from liability in respect of any default of such
Underwriter under this Agreement.

            9. Indemnity and Contribution.

            (a) The Company agrees to indemnify, defend and hold harmless each
      Underwriter, its partners, directors and officers, and any person who
      controls any Underwriter within the meaning of Section 15 of the Act or
      Section 20 of the Exchange Act, and the successors and assigns of all of
      the foregoing persons from and against any loss, damage, expense,
      liability or claim (including the reasonable cost of investigation) which,
      jointly or severally, any such Underwriter or any such person may incur
      under the Act, the Exchange Act, the common law or otherwise, insofar as
      such loss, damage,


                                       22


      expense, liability or claim arises out of or is based upon (i) any untrue
      statement or alleged untrue statement of a material fact contained in the
      Registration Statement (or in the Registration Statement as amended by any
      post-effective amendment thereof by the Company) or in a Prospectus (the
      term Prospectus for the purpose of this Section 10 being deemed to include
      any Preliminary Prospectus, the Prospectus and the Prospectus as amended
      or supplemented by the Company), or arises out of or is based upon any
      omission or alleged omission to state a material fact required to be
      stated in either such Registration Statement or Prospectus or necessary to
      make the statements made therein not misleading, except insofar as any
      such loss, damage, expense, liability or claim arises out of or is based
      upon any untrue statement or alleged untrue statement of a material fact
      contained in and in conformity with information furnished in writing by or
      on behalf of any Underwriter through you to the Company expressly for use
      with reference to such Underwriter in such Registration Statement or such
      Prospectus or arises out of or is based upon any omission or alleged
      omission to state a material fact in connection with such information
      required to be stated in such Registration Statement or such Prospectus or
      necessary to make such information not misleading or (ii) any untrue
      statement or alleged untrue statement made by the Company in Section 3 of
      this Agreement or the failure by the Company to perform when and as
      required any agreement or covenant contained herein or (iii) any untrue
      statement or alleged untrue statement of any material fact contained in
      any audio or visual materials provided by the Company or based upon
      written information furnished by or on behalf of the Company including,
      without limitation, slides, videos, films, tape recordings, used in
      connection with the marketing of the Shares.


            If any action, suit or proceeding (together, a "Proceeding") is
brought against an Underwriter or any such person in respect of which indemnity
may be sought against the Company pursuant to the foregoing paragraph, such
Underwriter or such person shall promptly notify the Company in writing of the
institution of such Proceeding and the Company shall assume the defense of such
Proceeding, including the employment of counsel reasonably satisfactory to such
indemnified party and payment of all fees and expenses; provided, however, that
the omission to so notify the Company shall not relieve the Company from any
liability which the Company may have to any Underwriter or any such person or
otherwise. Such Underwriter or such person shall have the right to employ its or
their own counsel in any such case, but the fees and expenses of such counsel
shall be at the expense of such Underwriter or of such person unless the
employment of such counsel shall have been authorized in writing by the Company
in connection with the defense of such Proceeding or the Company shall not have,
within a reasonable period of time in light of the circumstances, employed
counsel to defend such Proceeding or such indemnified party or parties shall
have reasonably concluded that there may be defenses available to it or them
which are different from, additional to or in conflict with those available to
the Company (in which case the Company shall not have the right to direct the
defense of such Proceeding on behalf of the indemnified party or parties), in
any of which events such fees and expenses shall be borne by the Company and
paid as incurred (it being understood, however, that the Company shall not be
liable for the expenses of more than one separate counsel (in addition to any
local counsel) in any one Proceeding or series of related Proceedings


                                       23

in the same jurisdiction representing the indemnified parties who are parties to
such Proceeding). The Company shall not be liable for any settlement of any
Proceeding effected without the written consent of the Company but if settled
with the written consent of the Company, the Company agrees to indemnify and
hold harmless any Underwriter and any such person from and against any loss or
liability by reason of such settlement. Notwithstanding the foregoing sentence,
if at any time an indemnified party shall have requested an indemnifying party
to reimburse the indemnified party for fees and expenses of counsel as
contemplated by the second sentence of this paragraph, then the indemnifying
party agrees that it shall be liable for any settlement of any Proceeding
effected without its written consent if (i) such settlement is entered into more
than sixty (60) days after receipt by such indemnifying party of the aforesaid
request, (ii) such indemnifying party shall not have reimbursed the indemnified
party in accordance with such request prior to the date of such settlement and
(iii) such indemnified party shall have given the indemnifying party at least
thirty (30) days' prior notice of its intention to settle. No indemnifying party
shall, without the prior written consent of the indemnified party, effect any
settlement of any pending or threatened Proceeding in respect of which any
indemnified party is or could have been a party and indemnity could have been
sought hereunder by such indemnified party, unless such settlement includes an
unconditional release of such indemnified party from all liability on claims
that are the subject matter of such Proceeding and does not include an admission
of fault, culpability or a failure to act, by or on behalf of such indemnified
party.

            (b) Each Underwriter severally agrees to indemnify, defend and hold
      harmless the Company, its directors and officers, and any person who
      controls the Company within the meaning of Section 15 of the Act or
      Section 20 of the Exchange Act, and the successors and assigns of all of
      the foregoing persons from and against any loss, damage, expense,
      liability or claim (including the reasonable cost of investigation) which,
      jointly or severally, the Company or any such person may incur under the
      Act, the Exchange Act, the common law or otherwise, insofar as such loss,
      damage, expense, liability or claim arises out of or is based upon any
      untrue statement or alleged untrue statement of a material fact contained
      in and in conformity with information furnished in writing by or on behalf
      of such Underwriter through you to the Company expressly for use with
      reference to such Underwriter in the Registration Statement (or in the
      Registration Statement as amended by any post-effective amendment thereof
      by the Company) or in a Prospectus.

            If any Proceeding is brought against the Company or any such person
in respect of which indemnity may be sought against any Underwriter pursuant to
the foregoing paragraph, the Company or such person shall promptly notify such
Underwriter in writing of the institution of such Proceeding and such
Underwriter shall assume the defense of such Proceeding, including the
employment of counsel reasonably satisfactory to such indemnified party and
payment of all fees and expenses; provided, however, that the omission to so
notify such Underwriter shall not relieve such Underwriter from any liability
which such Underwriter may have to the Company or any such person or otherwise.
The Company or such person shall have the right to employ its own counsel in any
such case, but the fees and expenses of such counsel shall be at the expense of
the Company or such person unless the employment of such counsel shall have been
authorized in writing by such Underwriter in connection with the defense of such
Proceeding or such Underwriter shall not have, within a reasonable period of
time in light of the circumstances, employed counsel to have charge of the
defense of such Proceeding or such indemnified party or


                                       24

parties shall have reasonably concluded that there may be defenses available to
it or them which are different from or additional to or in conflict with those
available to such Underwriter (in which case such Underwriter shall not have the
right to direct the defense of such Proceeding on behalf of the indemnified
party or parties, but such Underwriter may employ counsel and participate in the
defense thereof but the fees and expenses of such counsel shall be at the
expense of such Underwriter), in any of which events such fees and expenses
shall be borne by such Underwriter and paid as incurred (it being understood,
however, that such Underwriter shall not be liable for the expenses of more than
one separate counsel (in addition to any local counsel) in any one Proceeding or
series of related Proceedings in the same jurisdiction representing the
indemnified parties who are parties to such Proceeding). No Underwriter shall be
liable for any settlement of any such Proceeding effected without the written
consent of such Underwriter but if settled with the written consent of such
Underwriter, such Underwriter agrees to indemnify and hold harmless the Company
and any such person from and against any loss or liability by reason of such
settlement. Notwithstanding the foregoing sentence, if at any time an
indemnified party shall have requested an indemnifying party to reimburse the
indemnified party for fees and expenses of counsel as contemplated by the second
sentence of this paragraph, then the indemnifying party agrees that it shall be
liable for any settlement of any Proceeding effected without its written consent
if (i) such settlement is entered into more than sixty (60) days after receipt
by such indemnifying party of the aforesaid request, (ii) such indemnifying
party shall not have reimbursed the indemnified party in accordance with such
request prior to the date of such settlement and (iii) such indemnified party
shall have given the indemnifying party at least thirty (30) days' prior notice
of its intention to settle. No indemnifying party shall, without the prior
written consent of the indemnified party, effect any settlement of any pending
or threatened Proceeding in respect of which any indemnified party is or could
have been a party and indemnity could have been sought hereunder by such
indemnified party, unless such settlement includes an unconditional release of
such indemnified party from all liability on claims that are the subject matter
of such Proceeding.

            (c) If the indemnification provided for in this Section 9 is
      unavailable to an indemnified party under subsections (a) or (b) of this
      Section 9 in respect of any losses, damages, expenses, liabilities or
      claims referred to therein, then each applicable indemnifying party, in
      lieu of indemnifying such indemnified party, shall contribute to the
      amount paid or payable by such indemnified party as a result of such
      losses, damages, expenses, liabilities or claims (i) in such proportion as
      is appropriate to reflect the relative benefits received by the Company on
      the one hand and the Underwriters on the other hand from the offering of
      the Shares or (ii) if the allocation provided by clause (i) above is not
      permitted by applicable law, in such proportion as is appropriate to
      reflect not only the relative benefits referred to in clause (i) above but
      also the relative fault of the Company on the one hand and of the
      Underwriters on the other in connection with the statements or omissions
      which resulted in such losses, damages, expenses, liabilities or claims,
      as well as any other relevant equitable considerations. The relative
      benefits received by the Company on the one hand and the Underwriters on
      the other shall be deemed to be in the same respective proportions as the
      total proceeds from the offering (net of underwriting discounts and
      commissions but before deducting expenses) received by the Company and the
      total underwriting discounts and commissions received by the Underwriters,
      bear to the aggregate public offering price of the Shares. The relative
      fault of the Company on the one hand and of the Underwriters on the other
      shall be determined


                                       25

      by reference to, among other things, whether the untrue statement or
      alleged untrue statement of a material fact or omission or alleged
      omission relates to information supplied by the Company or by the
      Underwriters and the parties' relative intent, knowledge, access to
      information and opportunity to correct or prevent such statement or
      omission. The amount paid or payable by a party as a result of the losses,
      damages, expenses, liabilities and claims referred to in this subsection
      shall be deemed to include any legal or other fees or expenses reasonably
      incurred by such party in connection with investigating, preparing to
      defend or defending any Proceeding.

            (d) The Company and the Underwriters agree that it would not be just
      and equitable if contribution pursuant to this Section 9 were determined
      by pro rata allocation (even if the Underwriters were treated as one
      entity for such purpose) or by any other method of allocation that does
      not take account of the equitable considerations referred to in subsection
      (c) above. Notwithstanding the provisions of this Section 9, no
      Underwriter shall be required to contribute any amount in excess of the
      amount by which the total price at which the Shares underwritten by such
      Underwriter and distributed to the public were offered to the public
      exceeds the amount of any damage which such Underwriter has otherwise been
      required to pay by reason of such untrue statement or alleged untrue
      statement or omission or alleged omission. No person guilty of fraudulent
      misrepresentation (within the meaning of Section 11(f) of the Act) shall
      be entitled to contribution from any person who was not guilty of such
      fraudulent misrepresentation. The Underwriters' obligations to contribute
      pursuant to this Section 9 are several in proportion to their respective
      underwriting commitments and not joint.

            (e) The indemnity and contribution agreements contained in this
      Section 9 and the covenants, warranties and representations of the Company
      contained in this Agreement shall remain in full force and effect
      regardless of any investigation made by or on behalf of any Underwriter,
      its partners, directors or officers or any person (including each partner,
      officer or director of such person) who controls any Underwriter within
      the meaning of Section 15 of the Act or Section 20 of the Exchange Act, or
      by or on behalf of the Company, its directors or officers or any person
      who controls the Company within the meaning of Section 15 of the Act or
      Section 20 of the Exchange Act, and shall survive any termination of this
      Agreement or the issuance and delivery of the Shares. The Company and each
      Underwriter agree promptly to notify each other of the commencement of any
      Proceeding against it and, in the case of the Company, against any of the
      Company's officers or directors in connection with the issuance and sale
      of the Shares, or in connection with the Registration Statement or
      Prospectus.

            10. Notices. Except as otherwise herein provided, all statements,
requests, notices and agreements shall be in writing or by telegram and, if to
the Underwriters, shall be sufficient in all respects if delivered or sent to
UBS Warburg LLC, 299 Park Avenue, New York, New York 10171-0026, Attention:
Syndicate Department and, if to the Company, shall be sufficient in all respects
if delivered or sent to the Company at the offices of the Company at 10232 South
51st Street, Phoenix, Arizona 85044, Attention: Mr. Ricardo M. Ferreira.

            11. Information Furnished by the Underwriters. The statements set
forth in the fifth, sixth and eighth paragraphs under the caption "Underwriting"
in the Prospectus constitute


                                       26

the only information furnished by or on behalf of the Underwriters as such
information is referred to in Sections 3 and 9 hereof.

            12. Governing Law; Construction. This Agreement and any claim,
counterclaim or dispute of any kind or nature whatsoever arising out of or in
any way relating to this Agreement ("Claim"), directly or indirectly, shall be
governed by, and construed in accordance with, the laws of the State of New
York. The section headings in this Agreement have been inserted as a matter of
convenience of reference and are not a part of this Agreement.

            13. Submission to Jurisdiction. Except as set forth below, no Claim
may be commenced, prosecuted or continued in any court other than the courts of
the State of New York located in the City and County of New York or in the
United States District Court for the Southern District of New York, which courts
shall have jurisdiction over the adjudication of such matters, and the Company
consents to the jurisdiction of such courts and personal service with respect
thereto. The Company hereby consents to personal jurisdiction, service and venue
in any court in which any Claim arising out of or in any way relating to this
Agreement is brought by any third party against UBSW or any indemnified party.
Each of UBSW and the Company (on their respective behalfs and, to the extent
permitted by applicable law, on behalf of their respective stockholders and
affiliates) waives all right to trial by jury in any action, proceeding or
counterclaim (whether based upon contract, tort or otherwise) in any way arising
out of or relating to this Agreement. The Company agrees that a final judgment
in any such action, proceeding or counterclaim brought in any such court shall
be conclusive and binding upon the Company and may be enforced in any other
courts in the jurisdiction of which the Company is or may be subject, by suit
upon such judgment.

            14. Parties at Interest. The Agreement herein set forth has been and
is made solely for the benefit of the Underwriters and the Company and to the
extent provided in Section 9 hereof the controlling persons, directors and
officers referred to in such section, and their respective successors, assigns,
heirs, personal representatives and executors and administrators. No other
person, partnership, association or corporation (including a purchaser, as such
purchaser, from any of the Underwriters) shall acquire or have any right under
or by virtue of this Agreement.

            15. Counterparts. This Agreement may be signed by the parties in one
or more counterparts which together shall constitute one and the same agreement
among the parties. Delivery of an executed counterpart by facsimile shall be
effective as delivery of a manually executed counterpart thereof.

            16. Successors and Assigns. This Agreement shall be binding upon the
Underwriters, the Company and their successors and assigns and any successor or
assign of any substantial portion of the Company's, and any of the Underwriters'
respective businesses and/or assets.

            17. Miscellaneous. UBSW, an indirect, wholly owned subsidiary of UBS
AG, is not a bank and is separate from any affiliated bank, including any U.S.
branch or agency of UBS AG. Because UBSW is a separately incorporated entity, it
is solely responsible for its own contractual obligations and commitments,
including obligations with respect to sales and


                                       27

purchases of securities. Securities sold, offered or recommended by UBSW are not
deposits, are not insured by the Federal Deposit Insurance Corporation, are not
guaranteed by a branch or agency, and are not otherwise an obligation or
responsibility of a branch or agency.

            A lending affiliate of UBSW may have lending relationships with
issuers of securities underwritten or privately placed by UBSW. To the extent
required under the securities laws, prospectuses and other disclosure documents
for securities underwritten or privately placed by UBSW will disclose the
existence of any such lending relationships and whether the proceeds of the
issue will be used to repay debts owed to affiliates of UBSW.


                                       28

            If the foregoing correctly sets forth the understanding among the
Company and the Underwriters, please so indicate in the space provided below for
the purpose, whereupon this letter and your acceptance shall constitute a
binding agreement among the Company and the Underwriters, severally.

                                    Very truly yours,

                                    ALLIANCE MEDICAL CORPORATION

                                    By:____________________________________
                                       Name:
                                       Title:


Accepted and agreed to as of the
   date first above written, on behalf of
   themselves and the other several Underwriters
   named in Schedule A



UBS WARBURG LLC
RBC DAIN RAUSCHER INC.
SG COWEN SECURITIES CORPORATION



By:  UBS WARBURG LLC


By:__________________________________
   Name:
   Title:


By:__________________________________
   Name:
   Title:


                                       29

                                   SCHEDULE A




Underwriter                                                   Number of
- -----------                                                  Firm Shares
                                                             -----------
                                                         
UBS Warburg LLC........................................
RBC Dain Rauscher Inc. ................................
SG Cowen Securities Corporation........................


                                                             -----------
                  Total................................        4,000,000
                                                             ===========



                                       30

                                   SCHEDULE B



Name of Subsidiary and Ownership Interest*                  Jurisdiction of Incorporation
- ------------------------------------------                  -----------------------------
                                                         
Sterile Reprocessing Services, Inc.                         Texas

Crystal Medical Technologies, Inc. (dba ORRIS, Inc.)        Nevada

Applied Medical Recovery, Inc.                              Arizona

Arizona Medical Recovery & Reprocessing, L.L.C.(1)          Arizona

Applied Medical Technologies, L.L.C.(2)                     Arizona

Paragon Health Care Corporation                             South Carolina

Paragon Reprocessing Services, Inc.(3)                      Arkansas




- ------------------------------------

            * Unless otherwise indicated, all outstanding capital stock of
each of the Subsidiaries are owned by the Company.

           (1) All outstanding capital stock of the Subsidiary are owned by
Applied Medical Recovery, Inc., a wholly-owned Subsidiary of the Company.

           (2) Of this Subsidiary, 72% of the outstanding capital stock is owned
by Applied Medical Recovery, Inc., a wholly-owned Subsidiary of the Company and
28% of the outstanding capital stock is owned by Dr. Wade Hill.

           (3) All outstanding capital stock of the Subsidiary are owned by
Paragon Health Care Corporation, a wholly-owned Subsidiary of the Company.


                                       31


                                    EXHIBIT A


                         [FORM OF LOCK-UP AGREEMENT]






                                       32