Exhibit 4.1

                            Dated: September 7, 2005

         NEITHER THIS DEBENTURE NOR THE SECURITIES INTO WHICH THIS DEBENTURE IS
         CONVERTIBLE HAVE BEEN REGISTERED WITH THE SECURITIES AND EXCHANGE
         COMMISSION OR THE SECURITIES COMMISSION OF ANY STATE IN RELIANCE UPON
         AN EXEMPTION FROM REGISTRATION UNDER THE SECURITIES ACT OF 1933, AS
         AMENDED (THE "SECURITIES ACT"), AND, ACCORDINGLY, MAY NOT BE OFFERED OR
         SOLD EXCEPT PURSUANT TO AN EFFECTIVE REGISTRATION STATEMENT UNDER THE
         SECURITIES ACT OR PURSUANT TO AN AVAILABLE EXEMPTION FROM, OR IN A
         TRANSACTION NOT SUBJECT TO, THE REGISTRATION REQUIREMENTS OF THE
         SECURITIES ACT AND IN ACCORDANCE WITH APPLICABLE STATE SECURITIES LAWS.

  No. MEP                                                            1 $300,000

                      IN VERITAS MEDICAL DIAGNOSTICS, INC.

                          Secured Convertible Debenture


                              Due September 7, 2006

     This Secured Convertible Debenture (the "Debenture") is issued by IN
VERITAS MEDICAL DIAGNOSTICS, INC., a Colorado corporation (the "Obligor"), to
MONTGOMERY EQUITY PARTNERS, LTD. (the "Holder"), pursuant to that certain
Securities Purchase Agreement (the "Securities Purchase Agreement") of even date
herewith.

     FOR VALUE RECEIVED, the Obligor hereby promises to pay to the Holder or its
successors and assigns the principal sum of Three Hundred Thousand Dollars
($300,000), together with accrued but unpaid interest on or before the one year
anniversary of the date hereof (the "Maturity Date") in accordance with the
following terms:

     Payments. Interest on the outstanding principal balance hereof shall be due
and payable monthly, in arrears, commencing on the one month anniversary of the
date hereof and shall continue on the same day of each subsequent calendar month
thereafter that any amounts under this Debenture are due and payable until the
first Principal Payment Date (each, an "Interest Payment Date"). Principal shall
be due and payable in monthly installments of not less than $35,000 each, a
redemption premium equal to 12% ("Redemption Premium") of each such principal
installment, and plus accrued and unpaid interest, or the highest rate permitted
by applicable law, if lower. The installments of principal shall be due and
payable commencing on the date six (6) months from the date hereof and
subsequent installments shall be due and payable on the same day of each
subsequent calendar month thereafter ("Principal Payment Date") until the
outstanding principal balance is paid in full or the Maturity Date. All payments
in respect of the indebtedness evidenced hereby shall be made in collected




funds, and shall be applied to principal, accrued interest and charges and
expenses owing under or in connection with this Debenture in such order as the
Holder elects, except that payments shall be applied to accrued interest before
principal. Notwithstanding the foregoing, this Debenture shall become due and
immediately payable, including all accrued but unpaid interest pursuant to an
Event of Default (as defined in Section 2 hereof).

     Interest. Interest shall accrue on the outstanding principal balance hereof
at an annual rate equal to 18%. Interest shall be calculated on the basis of a
360-day year and the actual number of days elapsed, to the extent permitted by
applicable law. Interest hereunder will be paid to the Holder or its assignee
(as defined in Section 4) in whose name this Debenture is registered on the
records of the Obligor regarding registration and transfers of Debentures (the
"Debenture Register"). On the date hereof, the Obligor shall prepay $22,500 of
interest, which shall be applied to the first two months of interest on the
first two Interest Payment Dates.

         Right of Redemption. The Company at its option shall have the right,
with three (3) business days advance written notice ("Redemption Notice"), to
redeem a portion or all amounts outstanding under this Debenture prior to the
Maturity Date or any Principal Payment date. The Redemption Premium shall apply
to any such early redemptions whether on, before, or after any Principal Payment
Date or the Maturity Date. The Holder shall retain all its rights to convert
this Debenture pursuant to Section 3 hereof after receipt of a Redemption
Notice.

     Security Agreement. This Debenture is secured by a Security Agreement (the
"Security Agreement") of even date herewith between the Obligor and the Holder.

     Consent of Holder to Sell Capital Stock or Grant Security Interests. Except
as set forth in Schedule 4(k) of the Securities Purchase Agreement and except
for the capital stock to be issued pursuant to the Standby Equity Distribution
Agreement of even date herewith between the Obligator and Cornell Capital
Partners, LP, so long as any of the principal amount or interest on this
Debenture remains unpaid and unconverted, the Obligor shall not, without the
prior consent of the Holder, (i) issue or sell any common stock or preferred
stock without consideration or for a consideration per share less than the bid
price of common stock determined immediately prior to its issuance, (ii) issue
or sell any preferred stock, warrant, option, right, contract, call, or other
security or instrument granting the holder thereof the right to acquire common
stock without consideration or for a consideration per share less than the bid
price of common stock determined immediately prior to its issuance, (iii) enter
into any security instrument granting the holder a security interest in any of
the assets of the Obligor, or (iv) file any registration statements on Form S-8.

     This Debenture is subject to the following additional provisions:

     Section 1.
     ----------

This Debenture is exchangeable for an equal aggregate principal
amount of Debentures of different authorized denominations, as requested by the
Holder surrendering the same. No service charge will be made for such
registration of transfer or exchange.

     Section 2.   Events of Default.
     -------------------------------

          (a) An "Event of Default", wherever used herein, means any one of the
     following events (whatever the reason and whether it shall be voluntary or
     involuntary or effected by operation of law or pursuant to any judgment,
     decree or order of any court, or any order, rule or regulation of any
     administrative or governmental body):

                                        2


               (i) Any default in the payment of the principal of, interest on
          or other charges in respect of this Debenture, free of any claim of
          subordination, as and when the same shall become due and payable
          (whether on an installment, a Principal Payment Date, an Interest
          Payment Date, a Conversion Date or the Maturity Date or by
          acceleration or otherwise);

               (ii) The Obligor shall fail to observe or perform any other
          covenant, agreement or warranty contained in, or otherwise commit any
          breach or default of any provision of this Debenture (except as may be
          covered by Section 2(a)(i) hereof) or any Transaction Document (as
          defined in Section 4) which is not cured with in the time prescribed;

               (iii) The Obligor or any subsidiary of the Obligor shall
          commence, or there shall be commenced against the Obligor or any
          subsidiary of the Obligor under any applicable bankruptcy or
          insolvency laws as now or hereafter in effect or any successor
          thereto, or the Obligor or any subsidiary of the Obligor commences any
          other proceeding under any reorganization, arrangement, adjustment of
          debt, relief of debtors, dissolution, insolvency or liquidation or
          similar law of any jurisdiction whether now or hereafter in effect
          relating to the Obligor or any subsidiary of the Obligor or there is
          commenced against the Obligor or any subsidiary of the Obligor any
          such bankruptcy, insolvency or other proceeding which remains
          undismissed for a period of 61 days; or the Obligor or any subsidiary
          of the Obligor is adjudicated insolvent or bankrupt; or any order of
          relief or other order approving any such case or proceeding is
          entered; or the Obligor or any subsidiary of the Obligor suffers any
          appointment of any custodian, private or court appointed receiver or
          the like for it or any substantial part of its property which
          continues undischarged or unstayed for a period of sixty one (61)
          days; or the Obligor or any subsidiary of the Obligor makes a general
          assignment for the benefit of creditors; or the Obligor or any
          subsidiary of the Obligor shall fail to pay, or shall state that it is
          unable to pay, or shall be unable to pay, its debts generally as they
          become due; or the Obligor or any subsidiary of the Obligor shall call
          a meeting of its creditors with a view to arranging a composition,
          adjustment or restructuring of its debts; or the Obligor or any
          subsidiary of the Obligor shall by any act or failure to act expressly
          indicate its consent to, approval of or acquiescence in any of the
          foregoing; or any corporate or other action is taken by the Obligor or
          any subsidiary of the Obligor for the purpose of effecting any of the
          foregoing;

               (iv) The Obligor or any subsidiary of the Obligor shall default
          in any of its obligations under any other debenture or any mortgage,
          credit agreement or other facility, indenture agreement, factoring
          agreement or other instrument under which there may be issued, or by
          which there may be secured or evidenced any indebtedness for borrowed
          money or money due under any long term leasing or factoring
          arrangement of the Obligor or any subsidiary of the Obligor in an
          amount exceeding $100,000, whether such indebtedness now exists or
          shall hereafter be created and such default shall result in such
          indebtedness becoming or being declared due and payable prior to the
          date on which it would otherwise become due and payable;

               (v) The Common Stock shall cease to be quoted for trading or
          listed for trading on either the Nasdaq OTC Bulletin Board ("OTC"),
          Nasdaq SmallCap Market, New York Stock Exchange, American Stock
          Exchange or the Nasdaq National Market (each, a "Subsequent Market")
          and shall not again be quoted or listed for trading thereon within
          five (5) Trading Days of such delisting;

                                        3


               (vi) The Obligor or any subsidiary of the Obligor shall be a
          party to any Change of Control Transaction (as defined in Section 4);

               (vii) The Obligor shall fail to file the Underlying Shares
          Registration Statement (as defined in Section 4) with the Commission
          (as defined in Section 4), or the Underlying Shares Registration
          Statement shall not have been declared effective by the Commission, in
          each case within the time periods set forth in the Registration Rights
          Agreement of even date herewith between the Obligor and the Holder;

               (viii) If the effectiveness of the Underlying Shares Registration
          Statement lapses for any reason or the Holder shall not be permitted
          to resell the shares of Common Stock underlying this Debenture under
          the Underlying Shares Registration Statement, in either case, for more
          than five (5) consecutive Trading Days or an aggregate of eight
          Trading Days (which need not be consecutive Trading Days);

               (ix) The Obligor shall fail for any reason to deliver Common
          Stock certificates to a Holder prior to the fifth (5th) Trading Day
          after a Conversion Date or the Obligor shall provide notice to the
          Holder, including by way of public announcement, at any time, of its
          intention not to comply with requests for conversions of this
          Debenture in accordance with the terms hereof;

               (x) The Obligor shall fail for any reason to deliver the payment
          in cash pursuant to a Buy-In (as defined herein) within three (3) days
          after notice is claimed delivered hereunder;

          (b) During the time that any portion of this Debenture is outstanding,
     if any Event of Default has occurred, the full principal amount of this
     Debenture, together with interest and other amounts owing in respect
     thereof, to the date of acceleration shall become at the Holder's election,
     immediately due and payable in cash, provided however, the Holder may
     request (but shall have no obligation to request) payment of such amounts
     in Common Stock of the Obligor. In addition to any other remedies, the
     Holder shall have the right (but not the obligation) to convert this
     Debenture at any time after (x) an Event of Default or (y) the Maturity
     Date at the Conversion Price then in-effect. The Holder need not provide
     and the Obligor hereby waives any presentment, demand, protest or other
     notice of any kind, and the Holder may immediately and without expiration
     of any grace period enforce any and all of its rights and remedies
     hereunder and all other remedies available to it under applicable law. Such
     declaration may be rescinded and annulled by Holder at any time prior to
     payment hereunder. No such rescission or annulment shall affect any
     subsequent Event of Default or impair any right consequent thereon. Upon an
     Event of Default, notwithstanding any other provision of this Debenture or
     any Transaction Document, the Holder shall have no obligation to comply
     with or adhere to any limitations, if any, on the conversion of this
     Debenture or the sale of the Underlying Shares.


     Section 3.   Conversion.
     -----------------------

     (a)   (i) Conversion at Option of Holder.

                                        4


                    (A) This Debenture shall be convertible into shares of
               Common Stock at the option of the Holder, in whole or in part at
               any time and from time to time, after the Original Issue Date (as
               defined in Section 4) (subject to the limitations on conversion
               set forth in Section 3(a)(ii) hereof). The number of shares of
               Common Stock issuable upon a conversion hereunder equals the
               quotient obtained by dividing (x) the outstanding amount of this
               Debenture to be converted by (y) the Conversion Price (as defined
               in Section 3(c)(i)). The Obligor shall deliver Common Stock
               certificates to the Holder prior to the Fifth (5th) Trading Day
               after a Conversion Date.

                    (B) Notwithstanding anything to the contrary contained
               herein, if on any Conversion Date: (1) the number of shares of
               Common Stock at the time authorized, unissued and unreserved for
               all purposes, or held as treasury stock, is insufficient to pay
               principal and interest hereunder in shares of Common Stock; (2)
               the Common Stock is not listed or quoted for trading on the OTC
               or on a Subsequent Market; (3) the Obligor has failed to timely
               satisfy its conversion; or (4) the issuance of such shares of
               Common Stock would result in a violation of Section 3(a)(ii),
               then, at the option of the Holder, the Obligor, in lieu of
               delivering shares of Common Stock pursuant to Section 3(a)(i)(A),
               shall deliver, within three (3) Trading Days of each applicable
               Conversion Date, an amount in cash equal to the product of the
               outstanding principal amount to be converted plus any interest
               due therein divided by the Conversion Price and multiplied by the
               highest closing price of the stock from date of the conversion
               notice till the date that such cash payment is made.

               Further, if the Obligor shall not have delivered any cash due in
               respect of conversion of this Debenture or as payment of interest
               thereon by the fifth (5th) Trading Day after the Conversion Date,
               the Holder may, by notice to the Obligor, require the Obligor to
               issue shares of Common Stock pursuant to Section 3(c), except
               that for such purpose the Conversion Price applicable thereto
               shall be the lesser of the Conversion Price on the Conversion
               Date and the Conversion Price on the date of such Holder demand.
               Any such shares will be subject to the provisions of this
               Section.

                    (C) The Holder shall effect conversions by delivering to the
               Obligor a completed notice in the form attached hereto as Exhibit
               A (a "Conversion Notice"). The date on which a Conversion Notice
               is delivered is the "Conversion Date." Unless the Holder is
               converting the entire principal amount outstanding under this
               Debenture, the Holder is not required to physically surrender
               this Debenture to the Obligor in order to effect conversions.
               Conversions hereunder shall have the effect of lowering the
               outstanding principal amount of this Debenture plus all accrued
               and unpaid interest thereon in an amount equal to the applicable
               conversion. The Holder and the Obligor shall maintain records
               showing the principal amount converted and the date of such
               conversions. In the event of any dispute or discrepancy, the
               records of the Holder shall be controlling and determinative in
               the absence of manifest error.

          (ii) Certain Conversion Restrictions.

                    (A) A Holder may not convert this Debenture or receive
               shares of Common Stock as payment of interest hereunder to the
               extent such conversion or receipt of such interest payment would
               result in the Holder, together with any affiliate thereof,
               beneficially owning (as determined in accordance with Section
               13(d) of the Exchange Act and the rules promulgated thereunder)
               in excess of 4.9% of the then issued and outstanding shares of
               Common Stock, including shares issuable upon conversion of, and
               payment of interest on, this Debenture held by such

                                        5



               Holder after application of this Section. Since the Holder will
               not be obligated to report to the Obligor the number of shares of
               Common Stock it may hold at the time of a conversion hereunder,
               unless the conversion at issue would result in the issuance of
               shares of Common Stock in excess of 4.9% of the then outstanding
               shares of Common Stock without regard to any other shares which
               may be beneficially owned by the Holder or an affiliate thereof,
               the Holder shall have the authority and obligation to determine
               whether the restriction contained in this Section will limit any
               particular conversion hereunder and to the extent that the Holder
               determines that the limitation contained in this Section applies,
               the determination of which portion of the principal amount of
               this Debenture is convertible shall be the responsibility and
               obligation of the Holder. If the Holder has delivered a
               Conversion Notice for a principal amount of this Debenture that,
               without regard to any other shares that the Holder or its
               affiliates may beneficially own, would result in the issuance in
               excess of the permitted amount hereunder, the Obligor shall
               notify the Holder of this fact and shall honor the conversion for
               the maximum principal amount permitted to be converted on such
               Conversion Date in accordance with the periods described in
               Section 3(a)(i)(A) and, at the option of the Holder, either
               retain any principal amount tendered for conversion in excess of
               the permitted amount hereunder for future conversions or return
               such excess principal amount to the Holder. The provisions of
               this Section may be waived by a Holder (but only as to itself and
               not to any other Holder) upon not less than 65 days prior notice
               to the Obligor. Other Holders shall be unaffected by any such
               waiver.

          (b) (i) Nothing herein shall limit a Holder's right to pursue actual
     damages or declare an Event of Default pursuant to Section 2 herein for the
     Obligor 's failure to deliver certificates representing shares of Common
     Stock upon conversion within the period specified herein and such Holder
     shall have the right to pursue all remedies available to it at law or in
     equity including, without limitation, a decree of specific performance
     and/or injunctive relief, in each case without the need to post a bond or
     provide other security. The exercise of any such rights shall not prohibit
     the Holder from seeking to enforce damages pursuant to any other Section
     hereof or under applicable law.

               (ii) In addition to any other rights available to the Holder, if
          the Obligor fails to deliver to the Holder such certificate or
          certificates pursuant to Section 3(a)(i)(A) by the fifth (5th) Trading
          Day after the Conversion Date, and if after such fifth (5th) Trading
          Day the Holder purchases (in an open market transaction or otherwise)
          Common Stock to deliver in satisfaction of a sale by such Holder of
          the Underlying Shares which the Holder anticipated receiving upon such
          conversion (a "Buy-In"), then the Obligor shall (A) pay in cash to the
          Holder (in addition to any remedies available to or elected by the
          Holder) the amount by which (x) the Holder's total purchase price
          (including brokerage commissions, if any) for the Common Stock so
          purchased exceeds (y) the product of (1) the aggregate number of
          shares of Common Stock that such Holder anticipated receiving from the
          conversion at issue multiplied by (2) the market price of the Common
          Stock at the time of the sale giving rise to such purchase obligation
          and (B) at the option of the Holder, either reissue a Debenture in the
          principal amount equal to the principal amount of the attempted
          conversion or deliver to the Holder the number of shares of Common
          Stock that would have been issued had the Obligor timely complied with
          its delivery requirements under Section 3(a)(i)(A). For example, if
          the Holder purchases Common Stock having a total purchase price of
          $11,000 to cover a Buy-In with respect to an attempted conversion of
          Debentures with respect to which the market price of the Underlying
          Shares on the date of conversion was a total of $10,000 under clause
          (A) of the immediately preceding sentence, the Obligor shall be
          required to pay the Holder $1,000. The Holder shall provide the
          Obligor written notice indicating the amounts payable to the Holder in
          respect of the Buy-In.

                                        6


          (c) (i) The conversion price (the "Conversion Price") in effect on any
     Conversion Date shall be equal to $0.144, which may be adjusted pursuant to
     the other terms of this Debenture.

               (ii) If the Obligor, at any time while this Debenture is
          outstanding, shall (a) pay a stock dividend or otherwise make a
          distribution or distributions on shares of its Common Stock or any
          other equity or equity equivalent securities payable in shares of
          Common Stock, (b) subdivide outstanding shares of Common Stock into a
          larger number of shares, (c) combine (including by way of reverse
          stock split) outstanding shares of Common Stock into a smaller number
          of shares, or (d) issue by reclassification of shares of the Common
          Stock any shares of capital stock of the Obligor, then the Conversion
          Price shall be multiplied by a fraction of which the numerator shall
          be the number of shares of Common Stock (excluding treasury shares, if
          any) outstanding before such event and of which the denominator shall
          be the number of shares of Common Stock outstanding after such event.
          Any adjustment made pursuant to this Section shall become effective
          immediately after the record date for the determination of
          stockholders entitled to receive such dividend or distribution and
          shall become effective immediately after the effective date in the
          case of a subdivision, combination or re-classification.

               (iii) If the Obligor, at any time while this Debenture is
          outstanding, shall issue rights, options or warrants to all holders of
          Common Stock (and not to the Holder) entitling them to subscribe for
          or purchase shares of Common Stock at a price per share less than the
          Closing Bid Price at the record date mentioned below, then the
          Conversion Price shall be multiplied by a fraction, of which the
          denominator shall be the number of shares of the Common Stock
          (excluding treasury shares, if any) outstanding on the date of
          issuance of such rights or warrants (plus the number of additional
          shares of Common Stock offered for subscription or purchase), and of
          which the numerator shall be the number of shares of the Common Stock
          (excluding treasury shares, if any) outstanding on the date of
          issuance of such rights or warrants, plus the number of shares which
          the aggregate offering price of the total number of shares so offered
          would purchase at such Closing Bid Price. Such adjustment shall be
          made whenever such rights or warrants are issued, and shall become
          effective immediately after the record date for the determination of
          stockholders entitled to receive such rights, options or warrants.
          However, upon the expiration of any such right, option or warrant to
          purchase shares of the Common Stock the issuance of which resulted in
          an adjustment in the Conversion Price pursuant to this Section, if any
          such right, option or warrant shall expire and shall not have been
          exercised, the Conversion Price shall immediately upon such expiration
          be recomputed and effective immediately upon such expiration be
          increased to the price which it would have been (but reflecting any
          other adjustments in the Conversion Price made pursuant to the
          provisions of this Section after the issuance of such rights or
          warrants) had the adjustment of the Conversion Price made upon the
          issuance of such rights, options or warrants been made on the basis of
          offering for subscription or purchase only that number of shares of
          the Common Stock actually purchased upon the exercise of such rights,
          options or warrants actually exercised.

                                        7


               (iv) If the Obligor or any subsidiary thereof, as applicable, at
          any time while this Debenture is outstanding, shall issue shares of
          Common Stock or rights, warrants, options or other securities or debt
          that are convertible into or exchangeable for shares of Common Stock
          ("Common Stock Equivalents") entitling any Person to acquire shares of
          Common Stock, at a price per share less than the Conversion Price (if
          the holder of the Common Stock or Common Stock Equivalent so issued
          shall at any time, whether by operation of purchase price adjustments,
          reset provisions, floating conversion, exercise or exchange prices or
          otherwise, or due to warrants, options or rights per share which is
          issued in connection with such issuance, be entitled to receive shares
          of Common Stock at a price per share which is less than the Conversion
          Price, such issuance shall be deemed to have occurred for less than
          the Conversion Price), then, at the sole option of the Holder, the
          Conversion Price shall be adjusted to mirror the conversion, exchange
          or purchase price for such Common Stock or Common Stock Equivalents
          (including any reset provisions thereof) at issue. Such adjustment
          shall be made whenever such Common Stock or Common Stock Equivalents
          are issued. The Obligor shall notify the Holder in writing, no later
          than one (1) business day following the issuance of any Common Stock
          or Common Stock Equivalent subject to this Section, indicating therein
          the applicable issuance price, or of applicable reset price, exchange
          price, conversion price and other pricing terms. This adjustment shall
          apply whether or not any such issuances are permitted under the
          Section entitled "Consent of Holder to Sell Capital Stock or Grant
          Security Interests" hereto, except that no adjustment under this
          Section shall be made as a result of issuances and exercises of
          options to purchase shares of Common Stock issued for compensatory
          purposes to employees, officers, or directors pursuant to any of the
          Obligor's stock option or stock purchase plans which have been
          approved by the Board of Directors.

               (v) If the Obligor, at any time while this Debenture is
          outstanding, shall distribute to all holders of Common Stock (and not
          to the Holder) evidences of its indebtedness or assets or rights or
          warrants to subscribe for or purchase any security, then in each such
          case the Conversion Price at which this Debenture shall thereafter be
          convertible shall be determined by multiplying the Conversion Price in
          effect immediately prior to the record date fixed for determination of
          stockholders entitled to receive such distribution by a fraction of
          which the denominator shall be the Closing Bid Price determined as of
          the record date mentioned above, and of which the numerator shall be
          such Closing Bid Price on such record date less the then fair market
          value at such record date of the portion of such assets or evidence of
          indebtedness so distributed applicable to one outstanding share of the
          Common Stock as determined by the Board of Directors in good faith. In
          either case the adjustments shall be described in a statement provided
          to the Holder of the portion of assets or evidences of indebtedness so
          distributed or such subscription rights applicable to one share of
          Common Stock. Such adjustment shall be made whenever any such
          distribution is made and shall become effective immediately after the
          record date mentioned above.

               (vi) In case of any reclassification of the Common Stock or any
          compulsory share exchange pursuant to which the Common Stock is
          converted into other securities, cash or property, the Holder shall
          have the right thereafter to, at its option, (A) convert the then
          outstanding principal amount, together with all accrued but unpaid
          interest and any other amounts then owing hereunder in respect of this
          Debenture into the shares of stock and other securities, cash and
          property receivable upon or deemed to be held by holders of the Common
          Stock following such reclassification or share exchange, and the
          Holder of this Debenture shall be entitled upon such event to receive
          such amount of securities, cash or property as the shares of the

                                        8


          Common Stock of the Obligor into which the then outstanding principal
          amount, together with all accrued but unpaid interest and any other
          amounts then owing hereunder in respect of this Debenture could have
          been converted immediately prior to such reclassification or share
          exchange would have been entitled, or (B) require the Obligor to
          prepay the outstanding principal amount of this Debenture, plus all
          interest and other amounts due and payable thereon. The entire
          prepayment price shall be paid in cash. This provision shall similarly
          apply to successive reclassifications or share exchanges.

               (vii) The Obligor shall maintain a share reserve of not less than
          100% of the shares of Common Stock issuable upon conversion of this
          Debenture; and within three (3) Business Days following the receipt by
          the Obligor of a Holder's notice that such minimum number of
          Underlying Shares is not so reserved, the Obligor shall promptly
          reserve a sufficient number of shares of Common Stock to comply with
          such requirement.

               (viii) All calculations under this Section 3 shall be rounded up
          to the nearest $0.001 of a share.

               (ix) Whenever the Conversion Price is adjusted pursuant to
          Section 3 hereof, the Obligor shall promptly mail to the Holder a
          notice setting forth the Conversion Price after such adjustment and
          setting forth a brief statement of the facts requiring such
          adjustment.

               (x) If (A) the Obligor shall declare a dividend (or any other
          distribution) on the Common Stock; (B) the Obligor shall declare a
          special nonrecurring cash dividend on or a redemption of the Common
          Stock; (C) the Obligor shall authorize the granting to all holders of
          the Common Stock rights or warrants to subscribe for or purchase any
          shares of capital stock of any class or of any rights; (D) the
          approval of any stockholders of the Obligor shall be required in
          connection with any reclassification of the Common Stock, any
          consolidation or merger to which the Obligor is a party, any sale or
          transfer of all or substantially all of the assets of the Obligor, of
          any compulsory share exchange whereby the Common Stock is converted
          into other securities, cash or property; or (E) the Obligor shall
          authorize the voluntary or involuntary dissolution, liquidation or
          winding up of the affairs of the Obligor; then, in each case, the
          Obligor shall cause to be filed at each office or agency maintained
          for the purpose of conversion of this Debenture, and shall cause to be
          mailed to the Holder at its last address as it shall appear upon the
          stock books of the Obligor, at least twenty (20) calendar days prior
          to the applicable record or effective date hereinafter specified, a
          notice stating (x) the date on which a record is to be taken for the
          purpose of such dividend, distribution, redemption, rights or
          warrants, or if a record is not to be taken, the date as of which the
          holders of the Common Stock of record to be entitled to such dividend,
          distributions, redemption, rights or warrants are to be determined or
          (y) the date on which such reclassification, consolidation, merger,
          sale, transfer or share exchange is expected to become effective or
          close, and the date as of which it is expected that holders of the
          Common Stock of record shall be entitled to exchange their shares of
          the Common Stock for securities, cash or other property deliverable
          upon such reclassification, consolidation, merger, sale, transfer or
          share exchange, provided, that the failure to mail such notice or any
          defect therein or in the mailing thereof shall not affect the validity
          of the corporate action required to be specified in such notice. The
          Holder is entitled to convert this Debenture during the 20-day
          calendar period commencing the date of such notice to the effective
          date of the event triggering such notice.

                                        9


               (xi) In case of any (1) merger or consolidation of the Obligor or
          any subsidiary of the Obligor with or into another Person, or (2) sale
          by the Obligor or any subsidiary of the Obligor of more than one-half
          of the assets of the Obligor in one or a series of related
          transactions, a Holder shall have the right to (A) exercise any rights
          under Section 2(b), (B) convert the aggregate amount of this Debenture
          then outstanding into the shares of stock and other securities, cash
          and property receivable upon or deemed to be held by holders of Common
          Stock following such merger, consolidation or sale, and such Holder
          shall be entitled upon such event or series of related events to
          receive such amount of securities, cash and property as the shares of
          Common Stock into which such aggregate principal amount of this
          Debenture could have been converted immediately prior to such merger,
          consolidation or sales would have been entitled, or (C) in the case of
          a merger or consolidation, require the surviving entity to issue to
          the Holder a convertible Debenture with a principal amount equal to
          the aggregate principal amount of this Debenture then held by such
          Holder, plus all accrued and unpaid interest and other amounts owing
          thereon, which such newly issued convertible Debenture shall have
          terms identical (including with respect to conversion) to the terms of
          this Debenture, and shall be entitled to all of the rights and
          privileges of the Holder of this Debenture set forth herein and the
          agreements pursuant to which this Debentures were issued. In the case
          of clause (C), the conversion price applicable for the newly issued
          shares of convertible preferred stock or convertible Debentures shall
          be based upon the amount of securities, cash and property that each
          share of Common Stock would receive in such transaction and the
          Conversion Price in effect immediately prior to the effectiveness or
          closing date for such transaction. The terms of any such merger, sale
          or consolidation shall include such terms so as to continue to give
          the Holder the right to receive the securities, cash and property set
          forth in this Section upon any conversion or redemption following such
          event. This provision shall similarly apply to successive such events.

          (d) The Obligor covenants that it will at all times reserve and keep
     available out of its authorized and unissued shares of Common Stock solely
     for the purpose of issuance upon conversion of this Debenture and payment
     of interest on this Debenture, each as herein provided, free from
     preemptive rights or any other actual contingent purchase rights of persons
     other than the Holder, not less than such number of shares of the Common
     Stock as shall (subject to any additional requirements of the Obligor as to
     reservation of such shares set forth in this Debenture) be issuable (taking
     into account the adjustments and restrictions of Sections 2(b) and 3(c))
     upon the conversion of the outstanding principal amount of this Debenture
     and payment of interest hereunder. The Obligor covenants that all shares of
     Common Stock that shall be so issuable shall, upon issue, be duly and
     validly authorized, issued and fully paid, nonassessable and, if the
     Underlying Shares Registration Statement has been declared effective under
     the Securities Act, registered for public sale in accordance with such
     Underlying Shares Registration Statement.

          (e) Upon a conversion hereunder the Obligor shall not be required to
     issue stock certificates representing fractions of shares of the Common
     Stock, but may if otherwise permitted, make a cash payment in respect of
     any final fraction of a share based on the Closing Bid Price at such time.
     If the Obligor elects not, or is unable, to make such a cash payment, the
     Holder shall be entitled to receive, in lieu of the final fraction of a
     share, one whole share of Common Stock.

                                       10


          (f) The issuance of certificates for shares of the Common Stock on
     conversion of this Debenture shall be made without charge to the Holder
     thereof for any documentary stamp or similar taxes that may be payable in
     respect of the issue or delivery of such certificate, provided that the
     Obligor shall not be required to pay any tax that may be payable in respect
     of any transfer involved in the issuance and delivery of any such
     certificate upon conversion in a name other than that of the Holder of such
     Debenture so converted and the Obligor shall not be required to issue or
     deliver such certificates unless or until the person or persons requesting
     the issuance thereof shall have paid to the Obligor the amount of such tax
     or shall have established to the satisfaction of the Obligor that such tax
     has been paid.

          (g) Any notices, consents, waivers or other communications required or
     permitted to be given under the terms hereof must be in writing and will be
     deemed to have been delivered: (i) upon receipt, when delivered personally;
     (ii) upon receipt, when sent by facsimile (provided confirmation of
     transmission is mechanically or electronically generated and kept on file
     by the sending party); or (iii) one (1) Trading Day after deposit with a
     nationally recognized overnight delivery service, in each case properly
     addressed to the party to receive the same. The addresses and facsimile
     numbers for such communications shall be:


           If to the Company, to:  In Veritas Medical Diagnostics, inc.
                                   The Green House
                                   Beechwood Business Park North
                                   Inverness - Scotland L2 IV2 3BL
                                   Telephone: +44 (0) 146-366-7347
                                   Facsimile: +44 (0) 146-366-7310

           With a copy to:         Sichenzia Ross Friedman Ference LLP
                                   1065 Avenue of the Americas
                                   New York, NY 10018
                                   Attention:  Richard Friedman, Esq
                                   Telephone:  (212) 930-9700
                                   Facsimile:  (212) 930-9725

           If to the Holder:      Cornell Capital Partners, LP
                                  101 Hudson Street, Suite 3700
                                  Jersey City, NJ 07303
                                  Attention: Mark Angelo
                                  Telephone:   (201) 985-8300

           With a copy to:                                  David Gonzalez, Esq.
                                  101 Hudson Street - Suite 3700
                                  Jersey City, NJ 07302
                                  Telephone:   (201) 985-8300
                                  Facsimile:   (201) 985-8266

                                       11



or at such other address and/or facsimile number and/or to the attention of such
other person as the recipient party has specified by written notice given to
each other party three (3) business days prior to the effectiveness of such
change. Written confirmation of receipt (i) given by the recipient of such
notice, consent, waiver or other communication, (ii) mechanically or
electronically generated by the sender's facsimile machine containing the time,
date, recipient facsimile number and an image of the first page of such
transmission or (iii) provided by a nationally recognized overnight delivery
service, shall be rebuttable evidence of personal service, receipt by facsimile
or receipt from a nationally recognized overnight delivery service in accordance
with clause (i), (ii) or (iii) above, respectively.


     Section 4. Definitions.
     -----------------------
     For the purposes hereof, the following terms shall have the following
meanings:

     "Business Day" means any day except Saturday, Sunday and any day which
shall be a federal legal holiday in the United States or a day on which banking
institutions are authorized or required by law or other government action to
close.

     "Change of Control Transaction" means the occurrence of (a) an acquisition
after the date hereof by an individual or legal entity or "group" (as described
in Rule 13d-5(b)(1) promulgated under the Exchange Act) of effective control
(whether through legal or beneficial ownership of capital stock of the Obligor,
by contract or otherwise) of in excess of fifty percent (50%) of the voting
securities of the Obligor (except that the acquisition of voting securities by
the Holder shall not constitute a Change of Control Transaction for purposes
hereof), (b) a replacement at one time or over time of more than one-half of the
members of the board of directors of the Obligor which is not approved by a
majority of those individuals who are members of the board of directors on the
date hereof (or by those individuals who are serving as members of the board of
directors on any date whose nomination to the board of directors was approved by
a majority of the members of the board of directors who are members on the date
hereof), (c) the merger, consolidation or sale of fifty percent (50%) or more of
the assets of the Obligor or any subsidiary of the Obligor in one or a series of
related transactions with or into another entity, or (d) the execution by the
Obligor of an agreement to which the Obligor is a party or by which it is bound,
providing for any of the events set forth above in (a), (b) or (c).

     "Commission" means the Securities and Exchange Commission.


     "Common Stock" means the common stock, par value $0.001, of the Obligor and
stock of any other class into which such shares may hereafter be changed or
reclassified.

     "Exchange Act" means the Securities Exchange Act of 1934, as amended.

     "Original Issue Date" shall mean the date of the first issuance of this
Debenture regardless of the number of transfers and regardless of the number of
instruments, which may be issued to evidence such Debenture.

     "Closing Bid Price" means the price per share in the last reported trade of
the Common Stock on the OTC or on the exchange which the Common Stock is then
listed as quoted by Bloomberg, LP.

                                       12



     "Person" means a corporation, an association, a partnership, organization,
a business, an individual, a government or political subdivision thereof or a
governmental agency.

     "Securities Act" means the Securities Act of 1933, as amended, and the
rules and regulations promulgated thereunder.

     "Trading Day" means a day on which the shares of Common Stock are quoted on
the OTC or quoted or traded on such Subsequent Market on which the shares of
Common Stock are then quoted or listed; provided, that in the event that the
shares of Common Stock are not listed or quoted, then Trading Day shall mean a
Business Day.

     "Transaction Documents" means the Securities Purchase Agreement or any
other agreement delivered in connection with the Securities Purchase Agreement,
including, without limitation, the Security Agreement, the Pledge and Escrow
Agreement, and the Investor Registration Rights Agreement.

     "Underlying Shares" means the shares of Common Stock issuable upon
conversion of this Debenture or as payment of interest in accordance with the
terms hereof.

     "Underlying Shares Registration Statement" means a registration statement
meeting the requirements set forth in the Registration Rights Agreement,
covering among other things the resale of the Underlying Shares and naming the
Holder as a "selling stockholder" thereunder.


     Section 5.
     ----------
     Except as expressly provided herein, no provision of this Debenture shall
alter or impair the obligations of the Obligor, which are absolute and
unconditional, to pay the principal of, interest and other charges (if any) on,
this Debenture at the time, place, and rate, and in the coin or currency, herein
prescribed. This Debenture is a direct obligation of the Obligor. This Debenture
ranks pari passu with all other Debentures now or hereafter issued under the
terms set forth herein. As long as this Debenture is outstanding, the Obligor
shall not and shall cause their subsidiaries not to, without the consent of the
Holder, (i) amend its certificate of incorporation, bylaws or other charter
documents so as to adversely affect any rights of the Holder; (ii) repay,
repurchase or offer to repay, repurchase or otherwise acquire shares of its
Common Stock or other equity securities other than as to the Underlying Shares
to the extent permitted or required under the Transaction Documents; or (iii)
enter into any agreement with respect to any of the foregoing.


     Section 6.
     ----------
     This Debenture shall not entitle the Holder to any of the rights of a
stockholder of the Obligor, including without limitation, the right to vote, to
receive dividends and other distributions, or to receive any notice of, or to
attend, meetings of stockholders or any other proceedings of the Obligor, unless
and to the extent converted into shares of Common Stock in accordance with the
terms hereof.


     Section 7.
     ----------
     If this Debenture is mutilated, lost, stolen or destroyed, the Obligor
shall execute and deliver, in exchange and substitution for and upon
cancellation of the mutilated Debenture, or in lieu of or in substitution for a
lost, stolen or destroyed Debenture, a new Debenture for the principal amount of
this Debenture so mutilated, lost, stolen or destroyed but only upon receipt of
evidence of such loss, theft or destruction of such Debenture, and of the
ownership hereof, and indemnity, if requested, all reasonably satisfactory to
the Obligor.

                                       13


     Section 8.
     ----------
     No indebtedness of the Obligor is senior to this Debenture in right of
payment, whether with respect to interest, damages or upon liquidation or
dissolution or otherwise. Without the Holder's consent, the Obligor will not and
will not permit any of their subsidiaries to, directly or indirectly, enter
into, create, incur, assume or suffer to exist any indebtedness of any kind, on
or with respect to any of its property or assets now owned or hereafter acquired
or any interest therein or any income or profits there from that is senior in
any respect to the obligations of the Obligor under this Debenture.


     Section 9.
     ----------
     This Debenture shall be governed by and construed in accordance with the
laws of the State of New Jersey, without giving effect to conflicts of laws
thereof. Each of the parties consents to the jurisdiction of the Superior Courts
of the State of New Jersey sitting in Hudson County, New Jersey and the U.S.
District Court for the District of New Jersey sitting in Newark, New Jersey in
connection with any dispute arising under this Debenture and hereby waives, to
the maximum extent permitted by law, any objection, including any objection
based on forum non conveniens to the bringing of any such proceeding in such
jurisdictions.


     Section 10.
     -----------
     If the Obligor fails to strictly comply with the terms of this Debenture,
then the Obligor shall reimburse the Holder promptly for all fees, costs and
expenses, including, without limitation, attorneys' fees and expenses incurred
by the Holder in any action in connection with this Debenture, including,
without limitation, those incurred: (i) during any workout, attempted workout,
and/or in connection with the rendering of legal advice as to the Holder's
rights, remedies and obligations, (ii) collecting any sums which become due to
the Holder, (iii) defending or prosecuting any proceeding or any counterclaim to
any proceeding or appeal; or (iv) the protection, preservation or enforcement of
any rights or remedies of the Holder.


     Section 11.
     -----------
     Any waiver by the Holder of a breach of any provision of this Debenture
shall not operate as or be construed to be a waiver of any other breach of such
provision or of any breach of any other provision of this Debenture. The failure
of the Holder to insist upon strict adherence to any term of this Debenture on
one or more occasions shall not be considered a waiver or deprive that party of
the right thereafter to insist upon strict adherence to that term or any other
term of this Debenture. Any waiver must be in writing.

     Section 12.
     -----------
     If any provision of this Debenture is invalid, illegal or unenforceable,
the balance of this Debenture shall remain in effect, and if any provision is
inapplicable to any person or circumstance, it shall nevertheless remain
applicable to all other persons and circumstances. If it shall be found that any
interest or other amount deemed interest due hereunder shall violate applicable
laws governing usury, the applicable rate of interest due hereunder shall
automatically be lowered to equal the maximum permitted rate of interest. The
Obligor covenants (to the extent that it may lawfully do so) that it shall not
at any time insist upon, plead, or in any manner whatsoever claim or take the
benefit or advantage of, any stay, extension or usury law or other law which
would prohibit or forgive the Obligor from paying all or any portion of the
principal of or interest on this Debenture as contemplated herein, wherever
enacted, now or at any time hereafter in force, or which may affect the
covenants or the performance of this indenture, and the Obligor (to the extent
it may lawfully do so) hereby expressly waives all benefits or advantage of any
such law, and covenants that it will not, by resort to any such law, hinder,
delay or impeded the execution of any power herein granted to the Holder, but
will suffer and permit the execution of every such as though no such law has
been enacted.

                                       14



     Section 13.
     -----------
     Whenever any payment or other obligation hereunder shall be due on a day
other than a Business Day, such payment shall be made on the next succeeding
Business Day.

     Section 14.
     -----------
     THE PARTIES HEREBY KNOWINGLY, VOLUNTARILY AND INTENTIONALLY WAIVE THE RIGHT
ANY OF THEM MAY HAVE TO A TRIAL BY JURY IN RESPECT OF ANY LITIGATION BASED
HEREON OR ARISING OUT OF, UNDER OR IN CONNECTION WITH THIS AGREEMENT OR ANY
TRANSACTION DOCUMENT OR ANY COURSE OF CONDUCT, COURSE OF DEALING, STATEMENTS
(WHETHER VERBAL OR WRITTEN) OR ACTIONS OF ANY PARTY. THIS PROVISION IS A
MATERIAL INDUCEMENT FOR THE PARTIES' ACCEPTANCE OF THIS AGREEMENT.

                   [REMAINDER OF PAGE INTENTIONLLY LEFT BLANK]

                                       15




     IN WITNESS WHEREOF, the Obligor has caused this Secured Convertible
Debenture to be duly executed by a duly authorized officer as of the date set
forth above.

                                          IN VERITAS MEDICAL DIAGNOSTICS, INC.

                                          By:      /s/ John Fuller
                                                  ----------------------------
                                          Name:    John Fuller
                                          Title:   Chief Executive Officer

                                       16



                                   EXHIBIT "A"
                                   -----------


                              NOTICE OF CONVERSION
                              --------------------


        (To be executed by the Holder in order to convert the Debenture)



TO:

     The undersigned hereby irrevocably elects to convert $______________ of the
principal amount of the above Debenture into Shares of Common Stock of In
Veritas Medical Diagnostics, inc., according to the conditions stated therein,
as of the Conversion Date written below.

Conversion Date:
- -------------------------------------------------------------------------------
Applicable Conversion Price:
- -------------------------------------------------------------------------------
Signature:
- -------------------------------------------------------------------------------
Name:
- -------------------------------------------------------------------------------
Address:
- -------------------------------------------------------------------------------
Amount to be converted:                         $
- -------------------------------------------------------------------------------
Amount of Debenture unconverted:                $
- -------------------------------------------------------------------------------
Conversion Price per share:                     $
- -------------------------------------------------------------------------------
Number of  shares of Common  Stock to be
issued:
- -------------------------------------------------------------------------------
Please  issue the shares of Common Stock
in  the   following   name  and  to  the
following address:
- -------------------------------------------------------------------------------
Issue to:
Authorized Signature:
- -------------------------------------------------------------------------------
Name:
- -------------------------------------------------------------------------------
Title:
- -------------------------------------------------------------------------------
Phone Number:
- -------------------------------------------------------------------------------
Broker DTC Participant Code:
- -------------------------------------------------------------------------------
Account Number:
- -------------------------------------------------------------------------------