SECURITIES PURCHASE AGREEMENT
                                    EX- 10.26

     THIS SECURITIES  PURCHASE AGREEMENT  (hereinafter this "Agreement") is made
and entered  into as of this 22nd day of March,  1996,  by and between  PRIMEDEX
HEALTH SYSTEMS, INC., a New York corporation (hereinafter "PHS"), and DIAGNOSTIC
IMAGING SERVICES, INC., a Delaware corporation (hereinafter "DIS").

                              W I T N E S S E T H:

     WHEREAS,  PHS desires to purchase  from DIS, and DIS desires to sell to PHS
shares of its common stock,  $.01 par value and a warrant to purchase  shares of
its common stock, subject to the terms and conditions set forth herein;

     NOW, THEREFORE, in consideration of the premises and agreements hereinafter
set forth, and other good and valuable  consideration,  the receipt and adequacy
of which is hereby acknowledged, the parties hereby agree as follows:

     1.  Sale and Purchase of the Shares.

         (a) Sale of  Shares.  Upon the terms  and  subject  to the  conditions,
representations,  warranties and agreements of this Agreement,  Purchaser hereby
purchases  2,747,493  shares of DIS common stock,  $.01 par value (the "Shares")
and a five  year  warrant  to  purchase  an  additional  1,521,739  Shares  (the
"Warrant") from DIS, and DIS hereby sells the Shares and Warrant to PHS free and
clear of all liens, charges,  encumbrances,  equities, claims and options of any
nature whatsoever. The Warrant shall be in the form of Exhibit 1 attached.

         (b)  Purchase  Price.  As full  payment  for the Shares and Warrant PHS
shall  pay  DIS  a  purchase  price  of  Three  Million   Dollars   ($3,000,000)
(hereinafter the "Purchase Price") at the Closing.

     2.  Conditions to Closing.

         (a) DIS, PHS and Norman  Hames shall have  entered into a  Stockholders
Agreement in the form of Exhibit 2(a) attached.

         (b) DIS and PHS shall have entered into a Management Services Agreement
in the form of Exhibit 2(b) attached.

         (c) DIS and PHS shall have entered into a loan agreement in the form of
Exhibit 2(c) attached  whereby PHS shall make available to DIS up to $1,000,000,
all of which shall be advanced to DIS at the Closing.

         (d) DVI Financial  Services,  Inc., or its affiliate  shall have loaned
PHS $5,000,000.

     3. Closing.  The Closing shall be held at 1516 Cotner Avenue,  Los Angeles,
California,  at 11:00 A.M. on March 22,  1996,  or at such other time or at such
other place as may be mutually  approved by the parties in writing  ("Closing").
At the  Closing  the  consideration  required  by  Section 1  together  with the
documents  required  by Section 2 shall be  delivered  whereupon  the Shares and
Warrant shall be delivered  together with the other  certificates  and materials
required by this Agreement to be exchanged at the Closing.

     4.  DIS  Representations.  As an  inducement  to PHS  to  enter  into  this
Agreement  and  consummate  the  transactions  contemplated  hereby,  DIS hereby
represents and warrants to PHS and agrees as follows:









         (a) Due  Organization.  DIS is a duly  organized  and validly  existing
corporation  under the laws of the Slate of Delaware and has the corporate power
and lawful authority to own its properties and to transact the business in which
it is currently  engaged.  DIS is not,  and is not required to be,  qualified to
transact business as a foreign corporation in any jurisdiction.  DIS is the sole
shareholder  of  Diagnostic  Imaging  Services,  Inc., a California  corporation
("DIS-CA").  DIS-CA is duly  organized  and validly  existing  under laws of the
State of California and has the corporate power and lawful  authority to own its
properties and to transact the business in which it is currently engaged. DIS-CA
is not and is not required to be,  qualified  to transact  business as a foreign
corporation in any other jurisdiction.

         (b) Power and  Authority.  DIS has full  corporate  power to enter into
this  Agreement and to carry out its  obligations  hereunder.  The execution and
delivery of this Agreement and the consummation of the transactions contemplated
hereby have been  authorized by the DIS Board of Directors.  No other  corporate
acts or  proceedings  on the part of DIS will be  necessary  to  authorize  this
Agreement or the transactions  contemplated hereby. This Agreement constitutes a
valid and legally  binding  obligation of DIS and is enforceable  against DIS in
accordance with its terms.

         (c)  Ownership  of Shares.  The  authorized  capital of DIS consists of
20,000,000  shares of common stock, $.01 par value of which 8,562,617 shares are
issued and  outstanding,  together with  2,482,000  shares of Series F Preferred
Stock and 2,000,000 shares of Series G Preferred Stock which are outstanding out
of an  authorized  5,000,000  shares of  Preferred  Stock.  All of the Shares of
capital stock of DIS are validly issued, fully paid and nonassessable. There are
no agreements,  arrangements, options, warrants, calls, rights or commitments of
any character relating to the issuance, sale, purchase, retirement or redemption
of any  Shares,  except as set forth in the Form 10-K for DIS for the year ended
December 31, 1994, a copy which is attached hereto and marked as Exhibit 4(c)-1,
or except as may be issued pursuant to a proposed Series H Preferred Stock to be
issued  in  connection  with  the  retirement  of  certain  debt  the  presently
contemplated particulars of which are attached hereto as Exhibit 4(c)-2.

         (d) Validity of Shares and Warrant. The Shares and Warrant, when issued
in accordance  with the terms of this Agreement will be duly and validly issued.
The issuance of the Shares and Warrant and any subsequent issuance of the shares
underlying the Warrant are not and will not be subject to any preemptive  rights
or rights of first refusal and, when issued,  sold,  and delivered in compliance
with the  provisions  of this  Agreement  and the terms of tile  Warrant  and in
accordance with the DIS Certificate of  Incorporation,  the Shares,  Warrant and
shares   underlying  the  Warrant  will  be  validly  issued,   fully  paid  and
nonassessable, and will be free of any liens with the shares of DIS common stock
issuable on exercise of the Warrant  having been duly reserved for issuance upon
exercise;  provided, however, that the Shares, Warrant and shares underlying the
Warrant will be subject to  restrictions  on transfer under state and/or federal
securities laws as set forth herein or as otherwise required by such laws at the
time a transfer is proposed.

         (e) Offering. Assuming the accuracy of the representations contained in
Section 5 hereof,  the offer,  issue and sale of the Shares and  Warrant are and
will be exempt from the  registration  requirements  of the 1933 Securities Act,
and have been  registered  or  qualified  (or are exempt from  registration  and
qualification) under the registration,  permit or qualification  requirements of
federal and California law.

         (f) No  Breach.  This  execution,  delivery  and  performance  of  this
Agreement and the consummation of the transactions contemplated hereby will not:

(i) violate any provision of the Certificate of Incorporation or By-Laws of DIS;

       (ii)violate any order,  judgment,  injunction,  award or decree of
any court,  arbitrator or governmental  or regulatory  body against,  or binding
upon DIS, or upon the properties or business of DIS; or

    (iii)violate any statute, law or regulation of any jurisdiction applicable 
to the transactions contemplated herein; or


                                        2







              (iv)conflict with, result in a breach of the terms,  conditions or
provisions of, or constitute a default, an event of default or an event creating
rights of acceleration,  termination,  or cancellation under, the Certificate of
Incorporation or Bylaws of DIS, or any note,  instrument,  agreement,  mortgage,
lease, license, permit,  judgment,  order, award, decree or other authorization,
right,  restriction  or  obligation  to  which  DIS  is a  party  or  any of its
properties is subject or by which any of them is bound or any statute, other law
or regulatory provision affecting any of them; or

              (v) requiring the approval,  consent or  authorization  of, or the
making of any declaration,  filing or registration  with, any third party or any
foreign,  federal,  state or local court,  governmental  authority or regulatory
body,  except  for such  filings  as are  required  pursuant  to the  Rules  and
Regulations of the Securities and Exchange Commission.

         (g) Financial Statements and Other Financial Information.  Exhibit 4(c)
hereto  contains:  (i) the audited balance sheet and statements of operations of
DIS as of December 3 1, 1994 (herein  sometimes  called the "Balance Sheet") and
the related  statements  of operations  and retained  earnings for the year then
ended,  together with appropriate  notes to such financial  statements.  Exhibit
4(g)  attached  hereto is the DIS Form 10-Q for the nine months ended  September
30, 1995 and contains the  unaudited  balance  sheet and statement of operations
for the nine month period then ended.  (the  "Interim  Statement").  The Balance
Sheet and Interim  Statement  are  hereinafter  collectively  referred to as the
"Financial  Statements." The financial  statements  present fairly the financial
condition,  results of operations and charges in financial position of DIS as at
the dates or for the periods  indicated  therein in  conformity  with  generally
accepted  accounting  principles  applied  on  a  consistent  basis  (except  as
otherwise indicated in such Financial Statements or the notes thereto), subject,
in the case of unaudited interim consolidated financial statements,  to year-end
adjustments consisting only of normal recurring accruals.

         (h)  Operations Since Interim Statement Date.

              (i) Since September 30, 1995, there has been,  except as otherwise
described in this Agreement:  (i) no material  adverse change (either in any one
case or in the  aggregate)  in the assets,  properties,  liabilities,  business,
prospects or in the  condition,  financial or  otherwise,  of DIS and no fact or
condition exists which might cause such a change in the future;  (ii) no damage,
destruction,  loss or claim, to assets, whether or not covered by insurance,  or
condemnation  or other  taking of  assets,  affecting  the  properties,  assets,
business or prospects of DIS; and (iii) no other occurrence,  event or condition
(either in one case or in the aggregate) which adversely affects the properties,
assets, business or prospects of DIS.

              (ii)Since September 30, 1995, DIS has not: (A) issued,  delivered,
agreed (actually or  contingently)  to issue or deliver,  or granted any option,
warrant or right to purchase,  any capital stock, or security  convertible  into
capital stock, or any bonds,  notes, or other securities,  or borrowed or agreed
to  borrow  any  funds;  (B) paid  any  obligation  or  liability  (absolute  or
contingent) other than current liabilities reflected in the Financial Statements
and current  liabilities  reasonably  incurred since  September 30, 1995, in the
ordinary course of business; (C) declared or made, or agreed to declare or make,
any payment of dividends or distributions to shareholders or purchased, retired,
redeemed or  otherwise  acquired,  or agreed to  purchase,  redeem or  otherwise
acquire  any,  of its  capital  stock;  (D)  except  in the  ordinary  course of
business,  mortgaged,  pledged or encumbered any assets; (E) except for its sale
of its mobile MRI in San Diego, sold, leased, abandoned or otherwise disposed of
any real  property  or  interest  therein or any  machinery  equipment  or other
operating  property  or  sold,  licensed,  assigned,  transferred  or  otherwise
disposed of any patent,  or  application  therefor  or any  invention,  process,
know-how,  formula,  pattern, design, trade secret or other intangible asset or,
except for fair value in the ordinary course of business, sold or transferred or
agreed to sell or transfer any other assets;  (F) otherwise than in the ordinary
course of business  canceled or agreed to cancel any debts or claims,  waived or
agreed to waive any  rights of value,  or  allowed to lapse or failed to keep in
force  any  franchise,  permit  or other  authorization  or  right;  (G) made or
permitted  any amendment or  termination  of any material  contract,  license or
other  agreement;  (H)  otherwise  than  in  the  ordinary  course  of  business
undertaken  or  committed  to  capital  expenditures  exceeding  $10,000  in the
aggregate; (I) other than in


                                        3







the ordinary course of business  instituted,  or made any material  increase in,
any salary, profit sharing, bonus, incentive, deferred compensation,  insurance,
pension, retirement,  medical, hospital,  disability,  welfare or other employee
benefit plan; (J) other than in the ordinary course of business made any accrual
or arrangement  for or payment of any bonus or special  compensation of any kind
or any severance or termination pay to any present or former officer or employee
during the past year; (K) made any change in the accounting policies, methods or
practices  followed  by  DIS  or  made  any  material  change  in  depreciation,
amortization  or inventory  valuation  policies or rates or methods  theretofore
used or adopted except as reflected in the Financial Statements; (L) amended its
Certificate of Incorporation or Bylaws;  or (M) entered into or become committed
to enter into any other material  transaction  except in the ordinary  course of
business.

         (i)  No  Undisclosed  Liabilities.  DIS is not  aware  of any  material
liability,  absolute or contingent,  accrued or unaccrued, which is not shown or
which is in excess of amounts shown or reserved for in the Financial  Statements
or referred to in the notes thereto,  other than  liabilities of the same nature
as those set forth in the Financial  Statements and notes thereto and reasonably
incurred in the ordinary course of its business after September 30, 1995.

         (j) Taxes. DIS has filed all federal,  state, county, local and foreign
income,  excise,  property,  sales and other tax returns which are required,  by
statute, other law, regulation or otherwise, to be filed up to and including the
date hereof and have paid all taxes (and any other governmental charges, duties,
penalties,  interest or fines) which have become due pursuant to such returns or
otherwise,  or  pursuant  to any  assessment  which has become  payable,  and no
extension of the time for filing any tax return is presently in effect. All such
returns  and the returns to be filed by DIS with  respect to any interim  period
thereafter are or will be true and correct to the extent filed prior to the date
of this  Agreement.  To the extent  that any tax  liability  or  assessment  had
accrued  but had not yet  become  payable at  September  30,  1995,  or has been
proposed for  assessment or  determined  but remains  unpaid,  the same has been
reflected  as a liability  on the books and records of DIS and in the  Financial
Statements  or referred to in the notes  thereto.  Tax reserves are adequate for
contingent  liabilities  which may arise after the date of this Agreement due to
events prior to the execution of this  Agreement.  No waiver or extension of the
statute of  limitations  relating to the  assessment  of any federal  income tax
against DIS is presently  in effect and DIS has not been  notified of any audit.
All payments for  withholding  taxes,  unemployment  insurance and other amounts
required to be paid to any governmental authority in respect of employees of DIS
have been  paid or duly  provided  for on their  respective  books and  records,
except for approximately  $400,000  presently due on unpaid  withholding  taxes,
which is in the  process of being  incrementally  paid and should be paid within
the next 24 months.

     The tax  returns  for DIS have  never  been  examined  by any  governmental
authority.

         (k)  Availability  and  Ownership  of Assets and  Legality of Use.  The
assets owned or leased by DIS  constitute  all of the assets used and needed for
its  business  as it has  historically  been  conducted  by it,  are in good and
serviceable  condition,  ordinary wear and tear  excepted,  and suitable for the
uses for which  intended;  and such assets and their use conform in all material
respects to all applicable laws, regulations, rules, ordinances, codes, licenses
and permits (including without limitation, building, business use, environmental
and occupational safety and health requirements),  and no notice of any material
violation of any applicable law, regulation,  rule, ordinance,  code, license or
permit relating to such assets and their use has been received by Seller.

         (l) Accounts  Receivable;  Inventories.  All accounts receivable of DIS
have  arisen  from a bona  fide  transactions  by it in the  ordinary  course of
business  and DIS has  received  no notice  that such  accounts  receivable  are
subject to defense, counterclaim or setoff or are in dispute except as otherwise
stated in this  Agreement.  All of such accounts are good and collectible at the
aggregate   recorded  amounts  thereof,   net  of  any  applicable  reserve  for
contractuals  and doubtful  accounts which reserves (i) with respect to accounts
receivable  shown in the Financial  Statements are reflected  thereon,  and (ii)
with respect to accounts  receivable  acquired  since  September  30, 1995,  are
reflected  on the books and records  and are not in excess of an amount  bearing
the same  proportion to such accounts  receivable as the applicable  reserves in
the Financial  Statements bear to the aggregate  recorded amount of the accounts
receivable shown on such Financial Statements.


                                        4







         (m) No Violation or  Litigation.  (i) DIS has received no notice of any
facts which would lead it to believe  DIS is in  material  violation  of, or has
violated, any law, regulation,  rule, writ,  injunction,  decree or order of any
court  or  any  foreign,   federal,   state,   municipal  or  other  government,
governmental  department,  commission,  board, bureau, agency or instrumentality
which will result in expense or interfere  with the business of DIS;  (ii) there
are no material lawsuits,  claims, suits,  proceedings or investigations pending
or to the  best of its  knowledge  threatened  against  or  affecting  DIS,  its
officers or  directors or its  properties,  operations,  or business;  and (iii)
there is no action,  suit or proceeding by any governmental agency pending or to
the best of its knowledge  threatened  which questions the legality or propriety
of this Agreement or the transactions  contemplated  hereby.  DIS is in material
compliance with all laws,  regulations,  rules, writs,  injunctions,  decrees or
orders  of  any  court  or any  foreign,  federal,  state,  municipal  or  other
government,  governmental  department,  commission,  board,  bureau,  agency  or
instrumentality which govern its business.

         (n) Insurance.  DIS keeps  insurance of a type and in amounts  standard
for its industry in full force and effect. DIS is not in default or breach under
any of such  insurance  policies or has not failed to give any notice or present
any claim thereunder in a due and timely manner.

         (o) Real Property. DIS owns no real property.

         (p) Real  Property;  Leases.  (i) a description  of each lease or other
agreement  (showing the annual rental,  the expiration date, option periods,  if
any, a street  address of the real property  covered and a brief  description of
the improvements thereon) under which DIS is lessee of, or holds or operates any
real  property,  (ii) a description  of all other  interests in real property of
DIS,  and  (iii)  a  description  of  any  other  contract,   agreement,  lease,
concession, or commitment relating to or affecting real property or any interest
therein  to which DIS is a party or by which DIS is bound has been  provided  to
PHS. All of said leases are valid and in full force and there does not exist any
default or event that with  notice or lapse of time or both would  constitute  a
default  under  any of those  leases.  None of the  rights of DIS under any such
leasehold  or  other  interest  in  such  real  property  will  be  impaired  by
consummation of the transactions contemplated by this Agreement.

         (q) Easement; Ingress;  Condemnation.  DIS has all easements and rights
for  ingress  and  egress  and for  utilities  and  services  necessary  for the
operations  presently conducted by it. Neither the whole or any part of any real
property  or  interest  therein  owned,  leased,  used  or  occupied  by  DIS is
threatened by condemnation.

         (r) Personal  Property.  DIS owns or leases all the  personal  property
used to conduct its business. DIS has good, indefeasible and marketable title to
all personal  property  that it purports to own,  free and clear of all security
interests,  liens,  encumbrances,  pledges,  defects in title,  restrictions and
other burdens, except as has previously been disclosed to PHS.

         (s)  Personal  Property;  Leases.  A  list  of  all  leased  machinery,
equipment,   vehicles  and  other  leased  tangible   personal  property  and  a
description of all other  interests,  of DIS in tangible  personal  property has
been  delivered  to PHS.  None of the rights of DIS under any such  leasehold or
other  interest  in  tangible   personal   property  will  be  impaired  by  the
consummation of the transactions contemplated by this Agreement.

         (t) Governmental and Other Authorizations. DIS has all governmental and
other licenses, permits, orders, certificates and other authorizations necessary
to own or lease its properties,  to operate its respective properties and assets
and to carry on its business as now  conducted  ("Permits").  All of the permits
are in full force and effect and constitute legal, valid and binding obligations
of the  respective  parties  hereto,  and will not be  materially  affected as a
result of the  execution of this  Agreement.  No  proceeding  or other action is
pending or  threatened  to revoke or limit any of the  Permits,  and there is no
basis for any such  revocation or limitation.  DIS has not breached or defaulted
under,  nor is it in breach or default under, nor is it alleged to have breached
or defaulted under, any of the Permits and no event has occurred which, with the
passage of time or the giving of notice or both, would constitute such a default
or breach.


                                        5







         (u) Patents, Trade Names,  Trademarks and Other Rights. DIS owns or has
the perpetual royalty free right to use all patents,  trademarks,  servicemarks,
copyrights, trade names, inventions,  improvements,  processes,  formulae, trade
secrets, know-how and proprietary or confidential information used in conducting
its business or which are necessary to continue such business hereafter. DIS has
no  knowledge  or notice  that any  infringement  of any patent,  patent  right,
trademark,  servicemark,  trade name,  brand name or copyright  or  registration
thereof has  occurred or results in any way from the  operations  or business of
DIS. DIS has had no notice of, or knowledge of any basis for, a claim against it
that  any of its  operations,  activities,  products,  equipment,  machinery  or
processes  infringes  the  patents,  trademarks,   servicemarks,   trade  names,
copyright or other property rights of others.

         (v)  Employees and Agents and Related Agreements.

              (i) DIS is not a party to or bound by any (A) employee  collective
bargaining  agreement,  employment  agreement,  consulting  agreement,  deferred
compensation  agreement,  or covenant not to compete except for those agreements
with  Norman  Hames and Daniel  Steinell;  (B)  contract or  agreement  with any
officer,  director shareholder or employee,  agent or  attorney-in-fact;  or (C)
employees'  pension,  profit  sharing,  stock option,  bonus,  incentive,  stock
purchase,  welfare,  life insurance,  hospital or medical benefit plan (DIS does
have a medical  benefit plan, the provisions of which have been provided to PHS)
or any other  employee  benefit  agreement  or plan.  DIS's  relations  with its
employees is satisfactory.

              (ii)No shareholder, director or officer of DIS, (A) owns, directly
or  indirectly,  any interest  in, or is a director,  officer or employee of, or
consultant  to, any entity which is a  competitor,  supplier or customer of DIS;
(B) owns directly or  indirectly,  in whole or in part,  any property,  asset or
right,  tangible  or  intangible  (including,  but not  limited  to, any patent,
trademark,  serviceman,  trade name, brand name, copyright,  pending application
for  any  patent,  trademark,  serviceman,  or  copyright,  invention,  process,
know-how,  formula,  design  or  trade  secret)  which  is  associated  with any
property,  asset or right owned by DIS or which DIS is  presently  operating  or
using or the use of which is necessary for its business;  (C) is, subject to any
agreement  with any  person  or entity  requiring  such  shareholder,  director,
officer or employee to assign any interest in any inventions or trade secrets or
to  keep   confidential  any  information  or  containing  any  prohibitions  or
restriction of competition or solicitation of customers.

         (w) Status of Contracts. Each of DIS' material contracts is a valid and
binding  obligation  of the parties  thereto.  DIS has not breached or defaulted
under,  nor is it in breach or  default  under,  or has  notice of any breach or
default under,  any of the contracts and, no other party to any of the contracts
has breached or defaulted under any of the contracts,  and no event has occurred
which,  with  the  passage  of time or the  giving  of  notice  or  both,  would
constitute  such a default or breach by DIS or, by any such otter party. In late
1995, DIS received a notice of default under a financing  arrangement with Sanwa
Bank.  The  financing is current and has been for sometimes  however,  Sanwa has
never withdrawn the default notice.

         (x) Use of Proceeds.  DIS will utilize the Purchase  Price and PHS loan
proceeds totalling$4,000,000 as payment against what is referred to as its "Loan
B" from DVI Financial Services, Inc.

         (y) Disclosure.  None of the information or documents  furnished to PHS
or any of its  representatives  and none of the  representations  or  warranties
contained  herein  is false or  misleading  or  omits to state a  material  fact
required to be stated therein or herein in order to make the statements  therein
or herein not misleading.

         (z) Actions and Proceedings.  There is no outstanding order,  judgment,
injunction,  award or decree of any court,  governmental  or regulatory  body or
arbitration tribunal against or involving DIS. There is no material action, suit
or claim or legal,  administrative  or arbitral  proceeding or any investigation
(whether  or not the  defense  thereof or  liabilities  in respect  thereof  are
covered by insurance)  pending or, to the best  knowledge of Seller,  threatened
against or involving DIS or any of its properties or assets.


                                        6







         (aa) Brokers or Finders. No broker's or finder's fee will be payable by
DIS in connection with the transactions contemplated by this Agreement, nor will
any such fee be incurred as a result of any actions by D IS.

     5.  PHS  Representations.  As an  inducement  for DIS to  enter  into  this
Agreement  and  consummate  the  transactions  contemplated  hereby,  PHS hereby
represents and warrants to DIS and agrees as follows:

         (a) PHS acknowledges that the Shares and Warrant, and shares underlying
the Warrant,  are being acquired solely by and for PHS for investment and not as
nominees or agents for the benefit of any other  person,  and PHS has no current
intention of distributing, reselling or assigning the Shares, Warrant, and hares
underlying  the Warrant,  other than in  accordance  with the  provisions of the
Securities  Act of 1933,  as amended (the "1933 Act"),  rules under the 1933 Act
and any other applicable laws.

         (b) PHS  understands  that neither the Shares,  Warrant,  or the shares
underlying the Warrant,  have been  registered  under the 1933 Act, or under the
laws of any  jurisdiction,  and that DIS is under no  obligation  to register or
assist PHS in  registering  the Shares,  Warrant,  or the shares  underlying the
Warrant. PHS understands and agrees further that (i) the Shares, Warrant, or the
shares  underlying the Warrant,  must be held indefinitely  unless  subsequently
registered under the 1933 Act or an exemption from  registration  under the 1933
Act  covering  the sale of the  Shares,  Warrant,  or he shares  underlying  the
Warrant, is available. PHS understands that legends stating that the Shares have
not been  registered  under the 1933 Act and  setting  out or  referring  to the
restrictions  on  transferability  and sale of the  Shares and  Warrant,  or the
shares underlying the Warrant,  will be placed on the  certificates,  evidencing
the Shares, and Warrant, or the shares underlying the Warrant.

         (c) PHS is aware that (i)  investment  in the Shares,  Warrant,  or the
shares  underlying  the  Warrant,  involves a possible  degree of risk,  lack of
liquidity and substantial  restrictions on transferability of interest, and (ii)
no federal  or state  agency has made any  finding  or  determination  as to the
fairness for investment in, nor has made any  recommendation  or endorsement of,
the Shares, Warrant, or the shares underlying the Warrant.

         (d) PHS has  sufficient  financial  resources  available to support the
loss of all or a portion of PHS's  investment in the Shares and Warrant,  has no
need for  liquidity in the  investment  in the Shares and Warrant and is able to
bear the economic risk of the investment.

         (e) PHS is  sophisticated  and  experienced in financial,  business and
investment  matters,  is in the same business as DIS, is aware of DIS' financial
condition  and  business  affairs,  and,  as a result,  PHS is in a position  to
evaluate the  merits-and  risks of an investment in the Shares and Warrant,  the
restrictions on transferability and the tax consequences of the investment.

         (f) PHS has been  furnished  any and all  materials  PHS has  requested
relating to DIS, the Shares,  Warrant,  or the shares underlying the Warrant, or
the purchase and sale of the Shares and Warrant hereby and PHS has been afforded
the  opportunity  to ask questions of DIS concerning the terms and conditions of
the purchase and sale hereby and to obtain any additional  information necessary
to verify the accuracy of any  representations or information  appearing in this
Agreement.  PHS,  either  alone or with  PHS's  professional  advisors,  has the
capacity to protect PHS's interests in connection with this transaction.

         (g) PHS has relied  solely  upon the advice of its  advisors  (if any),
advice of its tax experts and independent  investigations made by PHS and/or its
representative(s)  in deciding to invest in the Shares and Warrant,  and no oral
or other representations other than those explicitly in this Agreement have been
made to PHS regarding the Shares and Warrant.


                                        7







         (h) PHS is a duly organized and validly existing  corporation under the
laws of the State of New York and has the power and lawful  authority to own its
properties and to transact the business in which it is currently engaged. PHS is
not,  and is not  required to be,  qualified  to transact  business as a foreign
corporation in any jurisdiction where it is not so qualified.

         (i) PHS has full power to enter  into this  Agreement  and the  related
agreements  which are exhibits to this Agreement and to carry out its respective
obligations  hereunder  and  thereunder.  The  execution  and  delivery  of this
Agreement and the related  agreements and the  consummation of the  transactions
contemplated hereby and thereby have been or will be duly and validly authorized
by PHS's board of  directors.  No other acts or  proceedings  on the part Of PHS
will be necessary to authorize this  Agreement or the related  agreements or the
transactions contemplated hereby and thereby. This Agreement constitutes a valid
and  legally  binding  obligation  of PHS  and  is  enforceable  against  PHS in
accordance with its terms.

         (j)  No  Breach.  The  execution,  delivery  and  performance  of  this
Agreement and the related  agreements  which are exhibits to this  Agreement and
the consummation of the transactions contemplated hereby will not:

              (i) violate any provision of the articles of incorporation of PHS;

              (ii)violate any order,  judgment,  injunction,  award or decree of
any court,  arbitrator or governmental  or regulatory  body against,  or binding
upon PHS, or upon the properties or business of PHS;

 (iii) violate any statute,law or regulation of any jurisdiction applicable
      to the transactions contemplated herein;

              (iv)conflict with, result in a breach of the terms,  conditions or
provisions of, or constitute a default, an event of default or an event creating
rights  of  acceleration,   termination,   or  cancellation   under,  any  note,
instrument, agreement, mortgage, lease, license, permit, judgment, order, award,
decree or other authorization, right, restriction or obligation to which the PHS
is a par y or any of its properties is subject or by which any of them are bound
or any statute, other law or regulatory provision affecting any of them; or

              (v) requiring the approval,  consent or  authorization  of, or the
making of any declaration,  filing or registration  with, any third party or any
foreign,  federal,  state or local court,  governmental  authority or regulatory
body.

         (k) No Violation or Litigation. PHS has received no notice of any facts
which  would  lead it to believe  (i) PHS is in  material  violation  of, or has
violated, any law, regulation,  rule, writ,  injunction,  decree or order of any
court  or  any  foreign,   federal,   state,   municipal  or  other  government,
governmental  department,  commission,  board, bureau, agency or instrumentality
which will result in expense or  interfere  with the  business of PHS;  and (ii)
there is any action, suit or proceeding by any governmental agency pending or to
the best of its knowledge  threatened which question;  the legality or propriety
of this Agreement or the transactions  contemplated hereby. PHS is in compliance
with all laws, regulations, rules, writs, injunctions,  decrees or orders of any
court  or  any  foreign,   federal,   state,   municipal  or  other  government,
governmental  department  commission,  board, bureau,  agency or instrumentality
which govern its business.

         (l) Actions and Proceedings.  There is no outstanding order,  judgment,
injunction,  award or decree of any court,  governmental  or regulatory  body or
arbitration tribunal against or involving PHS.

         (m) Hames  Guaranty.  PHS will use its best efforts to promptly  remove
Norman  Hames from all personal  guarantees  which he has given in behalf of DIS
obligations.


                                        8







         (n) Brokers or Finders.  No broker's or finder's fee will be payable by
PHS in connection with the transactions contemplated by this Agreement, nor will
any such fee be incurred as a result of any actions by PHS.

         (o) Disclosure.  None of the information or documents  furnished to DIS
or any of its  representatives  and none of the  representations  or  warranties
contained  herein  is false or  misleading  or  omits to state a  material  fact
required to be stated therein or herein in order to make the statements  therein
or herein not misleading.

     6.  Post Execution Obligations.

         (a) Further  Assurances.  The parties shall execute such  documents and
other  papers and take such  further  actions as may be  reasonably  required or
desirable to carry out the provisions  hereof and the transactions  contemplated
hereby. PHS shall be bound by and shall implement the related agreements.

         (b)  Survival  of  Representations  and  Warranties  of  Parties.   All
representations  and  warranties  of DIS and PHS made herein  shall  survive the
execution and delivery hereof for one (1) year following the date hereof.

         (c)  Registration Rights.

              (i)  "Piggyback  Registration".  If DIS at any  time  proposes  to
register any of its common stock,  $.01 par value under the 1933 Act (other than
in connection with a merger or pursuant to Form S-8 or other  comparable  form),
DIS shall request that the managing  underwriter  (if any) of such  underwritten
offering  include  up to  1,000,000  shares  of  the  Shares  (the  "Registrable
Securities")  in such  registration  and DIS shall use its best efforts to cause
such managing  underwriter to grant such request so long as it doesn't  diminish
the  proceeds  to be  received  by DIS  from  such  offering.  If such  managing
underwriter  agrees to include the  Registrable  Securities in the  underwritten
offering,  DIS  shall at such  time  give  prompt  written  notice to PHS of its
intention  to effect such  registration  and of PHS' right  under such  proposed
registration,  and upon the request of 'HS  delivered to DIS within  twenty (20)
days after  giving such notice  (which  request  shall  specify the  Registrable
Securities  intended  to be  disposed  of by PHS  and  the  intended  method  of
Disposition thereof),  DIS shall include such Registrable Securities held by PHS
requested to be included in such registration; provided, however, that:

                  A. If, at any time after  giving such  written  notice of DIS'
intention  to  register  any of the  Registrable  Securities  and  prior  to the
effective  date of the  registration  statement  filed in  connection  with such
registration, DIS shall determine for any reason not to register or to delay the
registration of such Registrable Securities,  at its sole election, DIS may give
written notice of such  determination  to PHS and thereupon shall be relieved of
its  obligation  to register any  Registrable  Securities  issued or issuable in
connection  with  such   registration  (but  not  from  its  obligation  to  pay
registration  expenses in  connection  therewith or to register the  Registrable
Securities in a subsequent registration);  and in the case of a determination to
delay a  registration  shall  thereupon be permitted  to delay  registering  any
Registrable Securities for the same period as the delay in respect of securities
being registered for DIS' own account.

                  B. If the managing  underwriter in such underwritten  offering
shall advise DIS that it declines to include a portion or all of the Registrable
Securities requested by PHS to be included in the registration  statement,  then
distribution of all or a specified  portion of the Registrable  Securities shall
be excluded from such registration  statement.  In such event DIS shall give PHS
prompt  notice  of the  number  of  Registrable  Securities  excluded  from such
registration at the request of the managing underwriter. No such exclusion shall
reduce the  securities  being  offered by the  Company for its own account to be
included in such registration statement.


                                        9







              (ii)Option to Include  Registrable  Securities  in Offering.  PHS,
subject to the provisions of Section 6(c),  shall have the option to include the
Registrable  Securities in DIS' underwritten offering. DIS shall not be required
to include any of the Registrable Securities in an underwritten offering of DIS'
securities  unless PHS  accepts  the terms of the  underwriting  as agreed  upon
between DIS and the  underwriters  selected by it (provided such terms are usual
and customary for selling stockholders) and PHS agrees to execute and/or deliver
such  documents in  connection  with stock  registration  as DIS or the managing
underwriter may reasonably request.

              (iiiCooperation  with  DIS.  PHS  will  cooperate  with DIS in all
respects in connection with the registration rights, including, timely supplying
all  information  reasonably  requested by DIS and  executing  and returning all
documents  reasonably  requested in connection with the registration and sale of
the Registrable Securities.

         (d) Registration Procedures.  If and whenever DIS is required by any of
the  provisions  of this  Agreement  to use  its  best  efforts  to  effect  the
registration of any of the Registrable  Securities under the 1933 Act, DIS shall
(except as otherwise provided in this Agreement), as expeditiously as possible:

              (i) prepare and file with the Securities  and Exchange  Commission
(the  "Commission")  a registration  statement and shall use its best efforts to
cause such registration statement to become effective and remain effective until
all the Registrable Securities are sold or become capable of being publicly sold
without registration under the 1933 Act.

              (ii)prepare  and file  with the  Commission  such  amendments  and
supplements to such registration statement and the prospectus used in connection
therewith as may be necessary to keep such registration  statement effective and
to comply with the  provisions of the 1933 Act with respect to the sale or other
disposition of all securities  covered by such registration  statement  whenever
DIS shall desire to sell or otherwise dispose of the same (including  prospectus
supplements  with respect to sales of securities from time to time in connection
with a registration statement pursuant to Rule 415 of the Commission);

              (iiifurnish to PHS such numbers of copies of a summary  prospectus
or other  prospectus,  including a  preliminary  prospectus  or any amendment or
supplement to any prospectus,  in conformity  with the  requirements of the 1933
Act,  and  such  other  documents,  as PHS may  reasonably  request  in order to
facilitate the public sale or other disposition of the Registrable Securities;

              (iv)use its best  efforts to register  and qualify the  securities
covered by such  registration  statement under such other securities or blue sky
laws of such jurisdictions as the underwriter shall reasonably  request,  and do
any and all other acts and things which may be reasonably necessary or advisable
to  enable  PHS to  consummate  the  public  sale or other  disposition  in such
jurisdictions  of the securities owned by PHS, except that DIS shall not for any
such purpose be required to qualify to do business as a foreign  corporation  in
any  jurisdiction  wherein it is not so qualified or to file therein any general
consent to service of process;

              (v) use  its  best  efforts  to list  such  securities  on (x) any
securities  exchange  on which  any  securities  of DIS is then  listed,  if the
listing of such  securities is then  permitted  under the rules of such exchange
and/or (y) Nasdaq, if the securities are then traded or quoted thereon,  subject
to applicable Nasdaq rules;

              (vi)enter into and perform its  obligations  under an underwriting
agreement,  if the offering is an underwritten  offering, in usual and customary
form,  with  the  managing  underwriter  or  underwriters  of such  underwritten
offering;


                                       10







              (viinotify  PHS at any time  when a  prospectus  relating  thereto
covered by such  registration  statement is required to be  delivered  under the
1933 Act, of the happening of any event of which it has knowledge as a result of
which the prospectus included in such registration  statement, as then in effect
includes  an untrue  statement  of a material  fact or omits to state a material
fact required to be stated therein or necessary to make the  statements  therein
not misleading in the light of the circumstances then existing; and

              (viitake such other  actions as shall be  reasonably  requested by
PHS to  facilitate  the  registration  and sale of the  Registrable  Securities;
provided,  however,  that DIS shall not be  obligated  to take any  actions  not
specifically  required  elsewhere  herein which in the  aggregate  would cost in
excess of $5,000.

         (e)  Expenses.  All  expenses  incurred  in  any  registration  of  the
Registrable  Securities  under this Agreement  shall be paid by DIS,  including,
without  limitation,  printing  expenses,  fees and disbursements of counsel for
DIS, expenses of any audits to which DIS shall agree or which shall be necessary
to  comply  with  governmental  I  requirements  in  connection  with  any  such
registration,  all registration  and filing fees for the Registrable  Securities
under  federal and State  securities  laws,  and expenses of complying  with the
securities or blue sky laws of any  jurisdictions  pursuant to Section 6(d)(iv);
provided,  however, DIS shall not be liable for (i) any discounts or commissions
to any  underwriter;  (ii) any stock  transfer  taxes  incurred  with respect to
Registrable  Securities  sold in the  Offering or (iii) the fees and expenses of
counsel  for PHS,  provided  that DIS will pay the  costs  and  expenses  of DIS
counsel  when  the DIS  counsel  is  representing  any or all  selling  security
holders.

         (f)  Indemnification.  In the  event  any  Registrable  Securities  are
included in a registration statement pursuant to this Agreement:

              (i) Indemnity.  Without limitation of any other indemnity provided
to PHS,  either in  connection  with the  Offering or  otherwise,  to the extent
permitted by law, DIS shall  indemnify and hold  harmless  PHS, the  affiliates,
officers, directors and partners of PHS, any underwriter (as defined in the 1933
Act) for PHS, and each person,  if any, who controls PHS or underwriter  (within
the  meaning  of the  1933  Act or the  Securities  Exchange  Act of  1934  (the
"Exchange Act"),  against any losses,  claims,  damages or liabilities (joint or
several) to which they may become  subject  under the 1933 Act, the Exchange Act
or other  federal  or state  law,  insofar as such  losses,  claims,  damages or
liabilities  (or actions in respect  thereof) arise out of or are based upon any
of  the  following   statements,   omissions  or  violations   (collectively   a
"Violation"): (1) any untrue statement or alleged untrue statement of a material
fact  contained  in  any  registration   statement   including  any  preliminary
prospectus  or  final  prospectus   contained   therein  or  any  amendments  or
supplements  thereto,  (2) the omission or alleged  omission to state  therein 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,  (3) any violation or alleged  violation by DIS of the 1933 Act, the
Exchange Act, or any state securities law or any rule or regulation  promulgated
under the 1933 Act, the Exchange  Act or any state  securities  law, and in each
case,  the Company  shall  reimburse  PHS, and each such  affiliate,  officer or
director or partner,  underwriter or  controlling  person for any legal or other
expenses incurred by them in connection with investigating or defending any such
loss, claim, damage, liability or action; provided,  however, that DIS shall not
be liable to PHS or any other  party in any such case for any such loss,  claim,
damage, liability or action to the extent that it arises out of or is based upon
a  Violation  which  occurs in  reliance  upon and in  conformity  with  written
information  furnished expressly for use in connection with such registration by
PHS or any  underwriter  or any other officer,  director or  controlling  person
thereof.

              (ii)Indemnity.  PHS shall  indemnify  and hold  harmless  DIS, its
affiliates, its counsel, officers, directors,  shareholders and representatives,
any  underwriter  (as  defined  in the 1933 Act) and each  person,  if any,  who
controls  DIS or the  underwriter  (within  the  meaning  of the 1933 Act or the
Exchange Act),  against any losses,  claims,  damages,  or liabilities (joint or
several) to which they may become  subject  under the 1933 Act, the Exchange Act
or any  state  securities  law,  and  PHS  shall  reimburse  DIS and  each  such
affiliate, counsel, Officer, director, shareholder, partner, or representative,

                                       11







underwriter  or controlling  person for any legal or other expenses  incurred by
them in connection with investigating or defending any such loss, claim, damage,
liability or action;  insofar as such losses, claims, damages or liabilities (or
actions and respect  thereof)  arise out of or are based upon any  statements or
information  provided in writing by PHS to DIS in  connection  with the offer or
sale  of   Registrable   Securities.   Notwithstanding   the   above,   the  PHS
indemnification  shall be limited to an amount  equal to the  proceeds to PHS of
the Registrable Securities sold for the account of PHS.

              (iii  Notice;  Right  to  Defend.  Promptly  after  receipt  by an
indemnified  party under this Section 6(f) of notice of the  commencement of any
action (including any governmental  action),  such indemnified party shall, if a
claim in respect thereof is to be made against any indemnifying party under this
Section  6(f),  deliver  to the  indemnifying  party  a  written  notice  of the
commencement  thereof  and the  indemnifying  party  shall  have  the  right  to
participate in and if the  indemnifying  party agrees in writing that it will be
responsible for any costs or expenses, judgments, damages and losses incurred by
the  indemnified  party  with  respect  to such  claim,  jointly  with any other
indemnifying party similarly noticed, to assume the defense thereof with counsel
mutually  satisfactory to the parties;  provided,  however,  that an indemnified
party shall have the right to retain its own counsel, with the fees and expenses
to be  paid by the  indemnifying  party,  if the  indemnified  party  reasonably
believes that  representation  of such indemnified party by the counsel retained
by the  indemnifying  party would be  inappropriate  due to actual or  potential
differing   interests  between  such  indemnified  party  and  any  other  party
represented by such counsel in such  proceeding.  The failure to deliver written
notice to the indemnifying party within a reasonable time of the commencement of
any such action shall  relieve such  indemnifying  party of any liability to the
indemnified  party  under this  Agreement  only if and to the  extent  that such
failure is prejudicial to its ability to defend such action, and the omission so
to deliver written notice to the  indemnifying  party will not relieve it of any
liability that it may have to any  indemnified  party  otherwise than under this
Agreement.

              (iv)Contribution.  If the  indemnification  provided  for in  this
Agreement is held by a court of competent  jurisdiction  to be unavailable to an
indemnified party with respect to any loss, liability,  claim, damage or expense
referred to therein,  then the indemnifying  party, in lieu of indemnifying such
indemnified party thereunder,  shall contribute to the amount paid or payable by
such indemnified f arty as a result of such loss,  liability,  claim,  damage or
expense in such  proportion as is  appropriate  to reflect the relative fault of
the indemnifying party on the one hand and of the indemnified party on the other
hand in connection with the statements or omissions which resulted in such loss,
liability,  claim,  damage or  expense as well as any other  relevant  equitable
consideration.  The relevant fault of the indemnifying party and the indemnified
party shall be  determined  by  reference  to, among other  things,  whether the
untrue or alleged untrue statement of a material fact or the omission to state a
material fact relates to information  supplied by the  indemnifying  party or by
the indemnified  party and the parties'  relative intent,  knowledge,  access to
information  and  opportunity  to correct or prevent such statement or omission.
Notwithstanding  the foregoing,  the amount PHS shall be obligated to contribute
pursuant to the Agreement shall be limited to an amount equal to the proceeds to
PHS Of the Registrable  Securities sold pursuant to the  registration  statement
which gives rise to such obligation to contribute  (less the aggregate amount of
any  damages  which PHS has  otherwise  been  required to pay in respect of such
loss,  claim,  damage,  liability or action or any  substantially  similar loss,
claim,  damage,  liability or action  arising from the sale of such  Registrable
Securities).

              (v) Survival of Indemnity.  The  indemnification  provided by this
Agreement shall be a continuing right to  indemnification  and shall survive the
registration  and sale of any  Registrable  Securities by any person entitled to
indemnification hereunder and the expiration or termination of this Agreement.

         (g) Assignment of Registration  Rights. The registration  rights of PHS
under this  Agreement  may not be assigned  without the written prior consent of
DIS.



                                       12







     7.  Miscellaneous.

         (a) Entire  Agreement.  This Agreement  (including the Exhibits hereto)
represent the entire  understanding and agreement among the parties with respect
to  the  subject   matter  hereof,   and  supersedes  all  other   negotiations,
understandings and representations (if any) made by and among such parties.

         (b)  Amendments.  The  provisions of this Agreement may not be amended,
supplemented,  waived or  changed  orally,  but only by a writing  signed by the
party  as to whom  enforcement  of any such  amendment,  supplement,  waiver  or
modification is sought and making specific reference to this Agreement.

         (c) Binding Effect.  All of the terms and provisions of this Agreement,
whether so expressed or not,  shall be binding upon,  inure,  to the benefit of,
and  be  enforceable  by  the  parties  and  their  respective   administrators,
executors, legal representatives, heirs, successors and permitted assigns.

         (d)  Headings.  The  headings  contained  in  this  Agreement  are  for
convenience of reference  only, are not to be considered a part hereof and shall
not limit or otherwise affect in any way the meaning or  interpretation  of this
Agreement.

         (e) Notices. All notices,  requests,  consents and other communications
required or permitted under this Agreement shall be in writing  (including telex
and telefax  communication)  and shall be (as elected by the person  giving such
notice) hand  delivered by messenger or courier  service,  telecommunicated,  or
mailed  (airmail if  international)  by  registered  or certified  mail (postage
prepaid), return receipt requested, addressed to:

         To PHS:

         Primedex Health Systems, Inc.
         1516 Cotner Avenue
         Los Angeles, California 90025
         Attention: Steven Hirschtick, Senior Vice President
         Fax No.: (310) 478-5310

         To DIS:

         Diagnostic Imaging Services, Inc.
         5730 Uplander Way, Suite 101
         Culver City, CA 90230
         AttentionNorman Hames, President
         Fax No.: (310) 670-5644

or to such other address as any party may designate by notice complying with the
terms of this  Section.  Each such notice shall be deemed  delivered  (a) on the
date delivered if by personal  delivery;  (b) on the date of  transmission  with
confirmed answer back if by telex or telefax; and (c) on the date upon which the
return  receipt is signed or delivery is refused or the notice is  designated by
the postal authorities as not deliverable, as the case may be, if mailed.

         (f)  Severability.  If any  provision  of this  Agreement  or any other
agreement  entered into pursuant hereto is contrary to,  prohibited by or deemed
invalid under applicable law or regulation, such provision shall be inapplicable
and deemed  omitted to the extent so contrary,  prohibited  or invalid,  but the
remainder hereof shall not be invalidated  thereby and shall be given full force
and  effect  so far as  possible.  If any  provision  of this  Agreement  may be
construed in two or more ways,  one of which would render the provision  invalid
or  otherwise  voidable or  unenforceable  and another of which would render the
provision  valid and  enforceable,  such provision  shall have the meaning which
renders it valid and enforceable.


                                       13







         (g)  Waivers.  The failure or delay of any party at any time to require
performance by another party of any provision of this Agreement,  even if known,
shall  not  affect  the  right of such  party  to  require  performance  of that
provision or to exercise any right, power or remedy hereunder. Any waiver by any
party of any breach of any provision of this  Agreement  should not be construed
as a waiver of any continuing or succeeding  breach of such provision,  a waiver
of the provision  itself,  or a waiver of any right,  power or remedy under this
Agreement.  No notice to or demand or any party in any case  shall,  of  itself,
entitle such party to any other or further  notice or demand in similar or other
circumstances.

         (h) Governing Law. This Agreement and all transactions  contemplated by
this  Agreement  shall be governed by, and  construed and enforced in accordance
with, the internal laws of the State of California  without regard to principles
of conflicts of laws.

         (i)  Preparation of Agreement.  This  Agreement  shall not be construed
more  strongly  against  any  party  regardless  of who is  responsible  for its
preparation. The parties acknowledge each contributed and is equally responsible
for its preparation.

         (j) Execution in Counterparts. This Agreement may be executed in one or
more  counterparts,  each of which shall be deemed an original agreement but all
of which shall be  considered  one and the same  instrument,  and shall become a
binding  agreement when one or more counterparts have been signed by each of the
parties.

         (k) Parties in Interest. Nothing in this Agreement,  whether express or
implied, is intended to confer any right, or remedies under or by reason of this
Agreement  on any  persons  other  than the  parties  to t and their  respective
successors and assigns, nor is anything in this Agreement intended to relieve or
discharge the  obligation or liability of any third persons to any Party to this
Agreement,  nor  shall  any  provision  give  any  third  persons  any  right of
subrogation or action over against any party to this Agreement.

     IN WITNESS WHEREOF,  the parties of this Agreement have duly executed it on
the 22nd day of March, 1996.


                                       PRIMEDEX HEALTH SYSTEMS, INC.


                                       By:  /s/ Herm Rosenman
                            Herm Rosenman, President


                        DIAGNOSTIC IMAGING SERVICES, INC.



                                       By: /s/ Norman Hames
                             Norman Hames, President