Document:

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                                                                   Exhibit 10.29

                                    AGREEMENT
                                       FOR
                              PET IMAGING SERVICES

THIS AGREEMENT is made to (Redwood Regional Medical Group referred to as
"Client") by MOBILE PET SYSTEMS, Inc., a Delaware Corporation (hereinafter
referred to as "MPET"), headquartered at 2240 Shelter Island, San Diego, CA.
92106 (619-226-6738)

Client has indicated a specific need for POSITRON EMISSION TOMOGRAPHY (PET)
services and MPET is prepared to meet those needs as follows:

1.       SERVICES

         1.01     MPET shall provide a CTI-SIEMENS ECAT EXACT P.E.T. system
                  housed in an 8' x 40' Calumet Coach at Client's site.

2.       MAINTENANCE

         2.01     MPET shall be responsible for the maintenance and repair of
                  the PET system in accordance with the manufacturer's
                  specifications. MPET will utilize Siemens factory authorized
                  and trained service engineers.

         8.1      MPET shall be responsible for Quality Assurance testing to
                  maintain the PET system in peak operating condition in
                  accordance with manufacturer's specifications.

3.       SITE

         3.01     Client shall make available an appropriate, safe, convenient
                  site in accordance with the manufacturer's guidelines on
                  Client's premises for the proper performance of PET studies on
                  the PET system.

4.       MATERIALS, SUPPLIES AND PERSONNEL

         4.01     MPET shall provide all PET Technologists required to operate
                  the PET system and perform the PET studies.

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         4.02     Client shall provide radiopharmaceutical agents, needles,
                  linen, film, and all patient supplies, etc., necessary for the
                  performance of PET studies.

         8.1      MPET shall provide an on-board generator to operate PET
                  system.

         4.04     Client shall pay for fuel associated with operation of PET
                  system.

5.       COMPENSATION

         5.01     As compensation for services performed under the Agreement,
                  Client shall compensate MPET as listed:

                  FEE FOR SERVICE:

                  First Four (4) PET Exams per day of service  $ 800.00 per Exam
                  Next Four (4) PET Exams per day of service   $ 700.00 per Exam
                  Additional PET Exams per day of service      $ 600.00 per Exam

                  A minimum of four (4) exams per day for 2 service days per
                  week is required with an option for a 3rd day per week.

                  Fee does not include FDG radiopharmaceuticals.

                  FEE FOR SERVICE OPTION: (may be exercised after 1st month)

                  Daily Flat Rate:  $4,600.00 a day.

                  ALL FEES FOR SERVICE DUE MPET WITHIN 45 DAYS OF INVOICE DATE.

6.       PRIMARY TERM

         6.01     The primary term of the agreement shall terminate June 30,
                  2000 with an option to renew monthly at client's request.

7.       INSURANCE

         8.1      Throughout the term of this Agreement, MPET shall maintain
                  reasonable amounts of commercial insurance covering:

                  I.       Comprehensive general and professional liability not
                           to exceed $1,000,000 per occurrence and $3,000,000
                           aggregate.

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                  II.      All risks of physical damage or loss to the equipment
                           provided by SERVICE hereunder; and

                  III.     Worker's Compensation coverage for employees of
                           SERVICE, if any, provided hereunder.

8.       TRAINING / MISC.

         8.1      MPET shall assist Client in:

                  1.       Providing first 20 over reads from UCLA / USC at
                           MPET's expense.

                  2.       Providing a one week preceptorship program for
                           Physician.

                  3.       Providing information regarding PET billing protocols
                           and insurance company reimbursement data.

                  4.       Providing a guest PET lecturer for Client's medical
                           staff meeting to advise referring physicians on the
                           benefits of PET.

AS AGREED UPON BY:

------------------------------                  --------------------------------
Mobile P.E.T. Systems, Inc                      Redwood Regional Medical Group
San Diego, CA                                   Murray Wood, MBA
                                                121 Sotoyome St.
                                                Santa Rosa,CA 95405

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                                    AMENDMENT
                                       TO
                                AGREEMENT BETWEEN
                          MOBILE P.E.T. SYSTEMS, INC.
                                       AND
                         REDWOOD REGIONAL MEDICAL GROUP

         WHEREAS, Mobile P.E.T. Systems, Inc. ("Mobile PET") and, REDWOOD
REGIONAL MEDICAL GROUP ("Client") (hereinafter referred to as the "Parties")
have entered into an Agreement dated ___________, 2000;

         WHEREAS, the Parties agree to amend said Agreement, in part, pursuant
to Paragraph 6.7 of the GENERAL PROVISIONS. THEREFORE, said Agreement shall be
amended, in part, by this Amendment, as follows:

         1)       Paragraph 5. TERM, RENEWAL AND TERMINATION is modified to a
                  "Three Year Term" from the commencement date and the term will
                  not automatically renew for an additional three years without
                  your written approval.

         2)       Paragraph 5.2.2. shall be amended as follows:

                  a.       The "right of first refusal" shall be non-binding.

         3)       Schedule "A" shall be amended as follows:

                  a.       Mobile PET will agree to provide two complete sets of
                           Med Image Work Station software and the Ethernet
                           connection to mobile coach. This software is
                           currently offered only on the Windows 98 platform.

         4)       Paragraph 3.1 shall be amended as follows:

                  a.       Mobile PET will agree to modify or replace with new
                           the existing "Russell Stole" receptacle to accept the
                           480 VAC//3Phase//85KVA fused at 100 Amps power
                           requirements of our coach.

                  b.       Mobile PET will pay for the trenching to the new
                           location of the PET System Trailer, located in the
                           front parking lot between the two trees.

                  c.       Price of this modification will not exceed $2,500.00.

                  d.       Connection of the (2) telephone lines and Ethernet
                           service will remain your responsibility as these are
                           within your building and should be easily handled by
                           your facility engineer.

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         5)       Schedule E shall be partially amended as follows:

                  a.       Mobile PET will agree to convert this agreement at
                           any one time with a 30 day written notice to a daily
                           flat rate of $4,500 for 8 Hours and $525.00 for each
                           additional hour per day.

                  b.       Mobile PET will agree to modify the required minimums
                           to reflect the following "Ramp up" service schedule:

                           i.       (1) One per day for the first (30) thirty
                                    days.

                           ii.      (2) Two per day for the next (30) thirty
                                    days.

                           iii.     (3) Three per day for the next (30) thirty
                                    days.

                           iv.      (4) Four per day minimum for the balance of
                                    the agreement.

         6)       Paragraph 2.4 "Training" of MOBILE PET SERVICES shall be
                  modified as follows:

                  a.       Mobile PET will agree to pay for the tuition expenses
                           for Dr. Morehead and (1) additional member of your
                           group to attend a preceptor at UCLA Medical Center.
                           Total cost not to exceed $3,000.00.

                  b.       There will be no charge for the training at the
                           London PET Centre for Dr. Morehead during his visit
                           to London on May 30th - June 2nd, 2000.

All other terms and conditions of the Agreement shall continue in full force and
effect.

                                  Executed this ___ day of ___________, 2000.

                                  MOBILE P.E.T. SYSTEMS, INC.
                                  a Delaware corporation

                                  By:____________________________
                                     Paul J. Crowe
                                     President

                                  Executed this ___ day of ___________, 2000.

                                  REDWOOD REGIONAL MEDICAL GROUP

                                  By:____________________________
                                  Name:__________________________
                                  Title:___________________________

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                                                                   Exhibit 10.30

                          SECURITIES PURCHASE AGREEMENT

                  THIS SECURITIES PURCHASE AGREEMENT, dated as of September 21,
2000, is entered into by and between MOBILE P.E.T. SYSTEMS, INC., a Delaware
corporation, with headquarters located at 2240 Shelter Island Drive, San Diego,
CA 92106, (the "Company"), and York, LLC, a Cayman Islands limited liability
company (the "Buyer").

                              W I T N E S S E T H:

                  WHEREAS, the Company and the Buyer are executing and
delivering this Agreement in accordance with and in reliance upon the exemption
from securities registration afforded, INTER ALIA, by Rule 506 under Regulation
D ("Regulation D") as promulgated by the United States Securities and Exchange
Commission (the "SEC") under the Securities Act of 1933, as amended (the "1933
Act"), and/or Section 4(2) of the 1933 Act;

                  WHEREAS, in consideration of the foregoing, the Buyer wishes
to purchase, upon the terms and subject to the conditions of this Agreement, 8%
Cumulative Convertible Redeemable Preferred Stock, Series B, $50,000 liquidation
value per share (the "Preferred Stock"), of the Company which will be
convertible into shares of Common Stock, par value $0.0001 per share, of the
Company (the "Common Stock"), together with the Common Stock Purchase Warrants
described herein, upon the terms and subject to the conditions of such Preferred
Stock, and subject to acceptance of this Agreement by the Company;

                  NOW THEREFORE, in consideration of the premises and the mutual
covenants contained herein and other good and valuable consideration, the
receipt and sufficiency of which are hereby acknowledged, the parties agree as
follows:

                  1. AGREEMENT TO PURCHASE; PURCHASE PRICE.

                  a. PURCHASE; CERTAIN DEFINITIONS. (i) The Buyer hereby agrees
to purchase from the Company 30 shares of the Preferred Stock at a price per
share of $50,000, for an aggregate purchase price of $1,500,000 (the "Purchase
Price") for all 30 shares, and having the terms and conditions set forth in the
Certificate of Designation, attached hereto as ANNEX I (the "Certificate of
Designation"). The Preferred Stock shall be purchased in two tranches. The
closing of the first tranche ("Tranche I") of twenty (20) shares of the
Preferred Stock for $1,000,000 (the "Tranche I Preferred") shall, subject to the
terms and conditions hereof, be funded $500,000 upon the Closing Date (as
defined below) and thereafter as the parties have agreed. The funding of the
second tranche ("Tranche II") consisting of ten (10) shares of the Preferred
Stock for $500,000 (the "Tranche II Preferred") shall be subject to the terms
and conditions of Section 4.g. hereof. The Purchase Price shall be payable in
United States Dollars.

                           (ii) As used herein, the term "Preferred Stock"
         includes all Series B preferred shares, if any, issued as dividends
         thereon, unless the context otherwise requires.

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                           (iii) As used herein, the term "Securities" means the
         Preferred Stock and the Common Stock issuable upon conversion of the
         Preferred Stock.

                  b. FORM OF PAYMENT. Except as set forth in the last sentence
of this paragraph, the Buyer shall pay the purchase price for the Preferred
Stock by delivering immediately available good funds in United States Dollars to
the escrow agent (the "Escrow Agent") identified in the Joint Escrow
Instructions attached hereto as ANNEX II (the "Joint Escrow Instructions"). No
later than the Closing Date (as defined below), the Company shall deliver one or
more certificates representing the Preferred Stock duly executed on behalf of
the Company (collectively, the "Certificate") to the Escrow Agent. By signing
this Agreement, the Buyer and the Company, and subject to acceptance by the
Escrow Agent, each agrees to all of the terms and conditions of, and becomes a
party to, the Joint Escrow Instructions, all of the provisions of which are
incorporated herein by this reference as if set forth in full. Notwithstanding
anything to the contrary in this Agreement or the Joint Escrow Instructions, the
Company hereby acknowledges that on September 5, 2000, it received $500,000 from
the Buyer towards the Tranche I purchase of the Preferred Stock and that on
September 15, 2000, it received in additional $485,000 from the Buyer towards
the Tranche I purchase of the Preferred Stock. Accordingly, in connection with
the funding of Tranche I the aggregate funds Buyer shall be obligated to wire to
the Escrow Agent shall equal $15,000, to be disbursed pursuant the Joint Escrow
Instructions.

                  c. METHOD OF PAYMENT. Except as set forth in paragraph 1b
above, payment into escrow of the Purchase Price for the Preferred Stock shall
be made by wire transfer of funds as instructed in the Joint Escrow
Instructions. Not later than 1:00 p.m., PST time, on the date which is one (1)
New York Stock Exchange trading day after the Company shall have accepted this
Agreement and returned a signed counterpart of this Agreement to the Escrow
Agent by facsimile, the Buyer shall deposit with the Escrow Agent the aggregate
purchase price for the Preferred Stock, less any amounts thereof paid directly
to the Buyer as set forth in the preceding paragraph, in immediately available
funds. Time is of the essence with respect to such payment, and failure by the
Buyer to make such payment shall allow the Company to cancel this Agreement.

                  d. ESCROW PROPERTY. The Purchase Price and the Certificate
delivered to the Escrow Agent as contemplated by Sections 1(b) and (c) hereof
are referred to as the "Escrow Property."

                  2. BUYER REPRESENTATIONS, WARRANTIES, ETC.; ACCESS TO
INFORMATION; INDEPENDENT INVESTIGATION.

                  Buyer represents and warrants to, and covenants and agrees
with, the Company as follows:

                  a. Without limiting Buyer's right to sell the Common Stock
pursuant to the

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Registration Statement (as that term is defined in the Registration Rights
Agreement defined below), the Buyer is purchasing the Preferred Stock and will
be acquiring the shares of Common Stock issuable upon conversion of the
Preferred Stock (the "Converted Shares") for its own account for investment, and
not with a view towards the public sale or distribution thereof and not with a
view to or for sale in connection with any distribution thereof.

                  b. The Buyer is (i) an "accredited investor" as that term is
defined in Rule 501 of the General Rules and Regulations under the 1933 Act by
reason of Rule 501(a)(3), (ii) experienced in making investments of the kind
described in this Agreement and the related documents, (iii) able, by reason of
the business and financial experience of its officers (if an entity) and
professional advisors (who are not affiliated with or compensated in any way by
the Company or any of its affiliates or selling agents), to protect its own
interests in connection with the transactions described in this Agreement, and
the related documents, and (iv) able to afford the entire loss of its investment
in the Securities.

                  c. All subsequent offers and sales of the Preferred Stock and
the shares of Common Stock representing the Converted Shares (such Common Stock
sometimes referred to as the "Shares") by the Buyer shall be made pursuant to
registration of the Shares under the 1933 Act or pursuant to an exemption from
registration.

                  d. The Buyer understands that the Preferred Stock are being
offered and sold to it in reliance on specific exemptions from the registration
requirements of United States federal and state securities laws and that the
Company is relying upon the truth and accuracy of, and the Buyer's compliance
with, the representations, warranties, agreements, acknowledgments and
understandings of the Buyer set forth herein in order to determine the
availability of such exemptions and the eligibility of the Buyer to acquire the
Preferred Stock.

                  e. The Buyer and its advisors, if any, have been furnished
with all materials relating to the business, finances and operations of the
Company and materials relating to the offer and sale of the Preferred Stock and
the offer of the Shares which have been requested by the Buyer, including ANNEX
V hereto. The Buyer and its advisors, if any, have been afforded the opportunity
to ask questions of the Company and have received complete and satisfactory
answers to any such inquiries. Without limiting the generality of the foregoing,
the Buyer has also had the opportunity to obtain and to review the Company's
annual report on Form 10-KSB for the year ending December 31, 1999, and all
other statements, reports and other documents filed by the Company with the SEC
and publicly available on EDGAR (the "SEC Reports");

                  f. The Buyer understands that its investment in the Securities
involves a high degree of risk.

                  g. The Buyer understands that no United States federal or
state agency or any other government or governmental agency has passed on or
made any recommendation or endorsement of the Securities.

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                  h. This Agreement has been duly and validly authorized,
executed and delivered on behalf of the Buyer and is a valid and binding
agreement of the Buyer enforceable in accordance with its terms, subject as to
enforceability to general principles of equity and to bankruptcy, insolvency,
moratorium and other similar laws affecting the enforcement of creditors' rights
generally.

                  i. Notwithstanding the provisions hereof or of the Preferred
Stock, in no event (except with respect to an automatic conversion of the
Preferred Stock as provided in the Certificate of Designations) shall any Buyer
be entitled to convert any Preferred Stock to the extent that, after such
conversion, the sum of (1) the number of shares of Common Stock beneficially
owned by such Buyer and its affiliates (other than shares of Common Stock which
may be deemed beneficially owned through the ownership of the unconverted
portion of the Preferred Stock), and (2) the number of shares of Common Stock
issuable upon the conversion of the Preferred Stock with respect to which the
determination of this proviso is being made, would result in beneficial
ownership by such Buyer and its affiliates of more than 4.99% of the outstanding
shares of Common Stock. For purposes of the proviso to the immediately preceding
sentence, beneficial ownership shall be determined in accordance with Section
13(d) of the Securities Exchange Act of 1934, as amended (the "1934 Act"). Any
issuance by the Company to the Buyer in excess of the limit contained in this
Paragraph 3.i. shall be null and void, AB INITIO, and upon notice of such
invalid issuance, the Company shall correct its books and cause its transfer
agent's books to be corrected forthwith to reflect that the Buyer's ownership of
Common Stock is within the limit set forth herein. Buyer shall immediately
deliver any certificates for invalidly issued Common Stock to the Company's
transfer agent. The Company further agrees to (i) immediately reissue
certificates for Common Stock to the extent that a portion of the Common Stock
represented by said certificates have been validly issued and (ii) immediately
reissue all or a portion of those shares which were deemed invalidly issued (at
a price set forth in the original conversion notices applicable to such shares)
upon notice from the Buyer that the reissuance of such shares would not cause
such Buyer to have a beneficial ownership interest in excess of 4.99%. The
Company hereby indemnifies and holds each holder free and harmless from and
against any and all liabilities, losses, costs and expenses, including, without
limitation, attorneys' fees and costs (collectively "Liabilities") arising from
or relating to claims made by any third parties with respect to any and all
purported violations by each holder under Sections 13(d) and/or 16 resulting
from a conversion(s) of the Preferred Stock, unless such claim arises from such
holder's default of its obligations hereunder, or representations or warranties
contained herein. The foregoing indemnity shall exclude Liabilities incurred by
any holder in connection with any violation of Sections 13(d) and/or 16 to the
extent arising from or are related to such holder's beneficial ownership of
shares of Common Stock (i) which are not acquired by conversion of Preferred
Stock, or (ii) deemed beneficially owned through the ownership of the
unconverted shares of the Preferred Stock.

                  j. Buyer represents that it neither is nor will be obligated
for any finders' fee or commission nor is it aware of any such fee or commission
payable in connection with this transaction other than as set forth on the Joint
Escrow Instructions (attached hereto as Annex II). Buyer agrees to indemnify and
to hold harmless the Company from any liability for any

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commission or compensation in the nature of a finders' fee (and the costs and
expenses of defending against such liability or asserted liability) for which
such Buyer or any of its officers, partners, employees, or representatives is
responsible. Buyer represents and warrants that neither the Company, nor any
persons or entities representing or purporting to represent the Company have
made any representation or warranty which is not contained expressly in this
Agreement or any other agreements referred to herein.

                  3. COMPANY REPRESENTATIONS, ETC.

                  The Company represents and warrants and hereby covenants and
agrees with Buyer that:

                  a. CONCERNING THE PREFERRED STOCK AND THE SHARES. The
Preferred Stock has been duly authorized and, when issued and paid for, will be
duly and validly issued, fully paid and non-assessable and will not subject the
holder thereof to personal liability for the obligations of the Company by
reason of being such holder. There are no preemptive rights of any stockholder
of the Company, as such, to acquire the Preferred Stock or the Shares.

                  b. REPORTING COMPANY STATUS. The Company is a corporation duly
organized, validly existing and in good standing under the laws of the State of
Delaware and has the requisite corporate power to own its properties and to
carry on its business as now being conducted. The Company is duly qualified as a
foreign corporation to do business and is in good standing in each jurisdiction
where the nature of the business conducted or property owned by it makes such
qualification necessary, other than those jurisdictions in which the failure to
so qualify would not have a material adverse effect on the business, operations
or prospects or condition (financial or otherwise) of the Company and its
subsidiaries, taken as a whole. The Company has registered its Common Stock
pursuant to Section 12 of the 1934 Act, and the Common Stock is listed and
traded on the OTC Bulletin Board. The Company has received no notice, either
oral or written, with respect to the continued eligibility of the Common Stock
for such listing, and the Company has maintained all requirements for the
continuation of such listing.

                  c. AUTHORIZED SHARES. The Company has at August 31, 2000,
14,994,658 shares of Common Stock outstanding, and has sufficient authorized and
unissued Shares as may be reasonably necessary to effect the conversion of the
Preferred Stock and the preferred stock purchased by Buyer pursuant to the March
Purchase Agreement, as defined in Section 4.g. hereof (assuming all future
conversions occurred are based upon an average 5-day closing bid of the Common
Stock, as reported by Bloomberg, LP which was one-half (1/2) of the closing bid
price of the Common Stock on the Closing Date [the "Closing Date Bid"]) and
exercise of the Warrants (as defined in Section 4.j.), and the warrants issued
in connection with the March Purchase Agreement, at the Closing Date Bid. The
Common Stock has been duly authorized and, when issued upon conversion of the
Preferred Stock in accordance with its terms, will be duly and validly issued,
fully paid and non-assessable and will not subject the holder thereof to
personal liability by reason of being such holder.

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                  d. SECURITIES PURCHASE AGREEMENT; REGISTRATION RIGHTS
AGREEMENT AND STOCK. This Agreement and the Registration Rights Agreement, the
form of which is attached hereto as ANNEX IV (the "Registration Rights
Agreement"), and the transactions contemplated hereby and thereby, have been
duly and validly authorized by the Company, this Agreement has been duly
executed and delivered by the Company and this Agreement is, and the Preferred
Stock, and the Registration Rights Agreement, when executed and delivered by or
on behalf of the Company, will be, valid and binding agreements of the Company
enforceable in accordance with their respective terms, subject, as to
enforceability, to general principles of equity and to bankruptcy, insolvency,
moratorium, and other similar laws affecting the enforcement of creditors'
rights generally.

                  e. NON-CONTRAVENTION. The execution and delivery of this
Agreement and the Registration Rights Agreement by the Company, the issuance of
the Securities, and the consummation by the Company of the other transactions
contemplated by this Agreement, the Registration Rights Agreement, and the
Preferred Stock do not and will not conflict with or result in a breach by the
Company of any of the terms or provisions of, or constitute a default under (i)
the articles of incorporation or by-laws of the Company, each as currently in
effect, (ii) except as disclosed in ANNEX V, any indenture, mortgage, deed of
trust, or other material agreement or instrument to which the Company is a party
or by which it or any of its properties or assets are bound, including any
listing agreement for the Common Stock (except as herein set forth), (iii) to
its knowledge, any existing applicable law, rule, or regulation or any
applicable decree, judgment, or order of any court, United States federal or
state regulatory body, administrative agency, or other governmental body having
jurisdiction over the Company or any of its properties or assets, or (iv) any
listing agreement for its Common Stock, except such conflict, breach or default
which would not have a material adverse effect on the transactions contemplated
herein.

                  f. APPROVALS. No authorization, approval or consent of any
court, governmental body, regulatory agency, self-regulatory organization, or
stock exchange or market or the stockholders of the Company is required to be
obtained by the Company for the issuance and sale of the Securities to the Buyer
as contemplated by this Agreement, except such authorizations, approvals and
consents that have been obtained.

                  g. SEC FILINGS. None of the Company's SEC Reports contained,
at the time they were filed, any untrue statement of a material fact or omit to
state any material fact required to be stated therein or necessary to make the
statements made therein in light of the circumstances under which they were
made, not misleading, except as corrected by an amended filing made prior to the
date hereof. Except as set forth on ANNEX V hereto, the Company has since
October, 1999 timely filed all requisite forms, reports and exhibits thereto
with the SEC.

                  h. ABSENCE OF CERTAIN CHANGES. Since March 31, 2000, there has
been no material adverse change in the business, properties, operations,
condition (financial or otherwise), or results of operations of the Company and
its subsidiaries, taken as a whole, except as disclosed in ANNEX V or in the
Company's SEC Reports. Since March 31, 2000, the Company has not (i) incurred

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or become subject to any material liabilities (absolute or contingent) except
liabilities incurred in the ordinary course of business consistent with past
practices; (ii) discharged or satisfied any material lien or encumbrance or paid
any material obligation or liability (absolute or contingent), other than
current liabilities paid in the ordinary course of business consistent with past
practices; (iii) declared or made any payment or distribution of cash or other
property to stockholders with respect to its capital stock, or purchased or
redeemed, or made any agreements to purchase or redeem, any shares of its
capital stock; (iv) sold, assigned or transferred any other tangible assets, or
canceled any debts or claims, except in the ordinary course of business
consistent with past practices; (v) suffered any substantial losses or waived
any rights of material value, whether or not in the ordinary course of business,
or suffered the loss of any material amount of existing business; (vi) made any
changes in employee compensation, except in the ordinary course of business
consistent with past practices; or (vii) experienced any material problems with
labor or management in connection with the terms and conditions of their
employment.

                  i. FULL DISCLOSURE. There is no fact known to the Company
(other than general economic conditions known to the public generally or as
disclosed in the Company's SEC Reports), that has not been disclosed in writing
to the Buyer that (i) would reasonably be expected to have a material adverse
effect on the business or financial condition of the Company or (ii) would
reasonably be expected to materially and adversely affect the ability of the
Company to perform its obligations pursuant to this Agreement or any of the
agreements contemplated hereby (collectively, including this Agreement, the
"Transaction Agreements").

                  j. ABSENCE OF LITIGATION. Except as set forth in ANNEX V
hereto, and in the Company's SEC Reports, which the Buyer has reviewed, there is
no action, suit, proceeding, inquiry or investigation before or by any court,
public board or body pending or, to the knowledge of the Company, threatened
against or affecting the Company, wherein an unfavorable decision, ruling or
finding would have a material adverse effect on the properties, business or
financial condition. results of operation or prospects of the Company and its
subsidiaries taken as a whole or the transactions contemplated by any of the
Transaction Agreements or which would adversely affect the validity or
enforceability of, or the authority or ability of the Company to perform its
obligations under, any of the Transaction Agreements.

                  k. ABSENCE OF EVENTS OF DEFAULT. Except as set forth in ANNEX
V hereto, no Event of Default (or its equivalent term), as defined in the
respective agreement to which the Company is a party, and no event which, with
the giving of notice or the passage of time or both, would become an Event of
Default (or its equivalent term) (as so defined in such agreement), has occurred
and is continuing, which would have a material adverse effect on the Company's
financial condition or results of operations.

                   l. PRIOR ISSUES. Except as set forth in ANNEX V, during the
twelve (12) months preceding the date hereof, the Company has not issued any
Common Stock or convertible securities in capital transactions which have not
been fully disclosed in the Company's filings with the SEC.

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Except as set forth in ANNEX V, all such issuances (except for issuances to
Buyer) have been fully converted into shares of common stock and there are no
outstanding unconverted debt or convertible securities from those transactions.

                  m. NO UNDISCLOSED LIABILITIES OR EVENTS. Except as set forth
in ANNEX V, the Company has no liabilities or obligations other than those
disclosed in the Company's SEC Reports or those incurred in the ordinary course
of the Company's business since March 31, 2000, and which, individually or in
the aggregate, do not or would not have a material adverse effect on the
properties, business, condition (financial or otherwise), results of operations
or prospects of the Company and its subsidiaries, taken as a whole. No event or
circumstances has occurred or exists with respect to the Company or its
properties, business, condition (financial or otherwise), results of operations
or prospects, which, under applicable law, rule or regulation, requires public
disclosure or announcement prior to the date hereof by the Company but which has
not been so publicly announced or disclosed.

                  n. NO DEFAULT. Except as disclosed in ANNEX V, hereto, the
Company is not in default in the performance or observance of any material
obligation, agreement, covenant or condition contained in any indenture,
mortgage, deed of trust or other material instrument or agreement to which it is
a party or by which it or its property is bound.

                  o. NO INTEGRATED OFFERING. Neither the Company nor any of its
affiliates nor any person acting on its or their behalf has, directly or
indirectly, made any offer or sales of any security or solicited any offers to
buy any security under circumstances that would eliminate the availability of
the exemption from registration under Regulation D in connection with the offer
and sale of the Securities as contemplated hereby.

                  p. DILUTION. The number of Shares issuable upon conversion of
the Preferred Stock may increase substantially in certain circumstances,
including, but not necessarily limited to, the circumstance wherein the trading
price of the Common Stock declines prior to the conversion of the Preferred
Stock. The Company's executive officers and directors have studied and fully
understand the nature of the Securities being sold hereby and recognize that
they have a potential dilutive effect. The board of directors of the Company has
concluded that, in its good faith business judgment, such issuance is in the
best interests of the Company. The Company specifically acknowledges that its
obligation to issue the Shares upon conversion of the Preferred Stock is binding
upon the Company and enforceable regardless of the dilution such issuance may
have on the ownership interests of other shareholders of the Company.

                  q. ACKNOWLEDGMENT BY COMPANY. Company represents and warrants
that neither the Buyer, nor any persons or entities representing or purporting
to represent the Buyer have made any representation or warranty which is not
contained expressly in this Agreement or any other agreements referred to
herein. Without limiting the foregoing, Company specifically acknowledges that
the Buyer has made no representations that it is a "long term" investor in the
Company, or that it intends to hold the Preferred Stock or shares of stock in
the Company (obtained by conversions

                                       8
<PAGE>

of the Preferred Stock) for any period beyond that which is required under the
Securities Act. Company further acknowledges that the Buyer may hedge the shares
of stock in the Company prior to or after the conversions of any of the
Preferred Stock, provided that such hedging is done in compliance with the
Securities Act, Securities Exchange Act, any rules applicable to securities
traded on the OTC - Bulletin Board (if applicable) and the express terms of this
Agreement, the Certificate of Designation for the Preferred Stock and the
Registration Rights Agreement.

                  r. BROKERS FEE. The Company represents that it neither is nor
will be obligated for any finders' fee or commission nor is it aware of any such
fee or commission payable in connection with this transaction other than as set
forth on the Joint Escrow Instructions (attached hereto as Annex II). The
Company agrees to indemnify and to hold harmless the Buyer from any liability
for any commission or compensation in the nature of a finders' fee (and the
costs and expenses of defending against such liability or asserted liability)
for which the Company or any of its officers, partners, employees, or
representatives is responsible.

                  4. CERTAIN COVENANTS AND ACKNOWLEDGMENTS.

                  a. TRANSFER RESTRICTIONS. The Buyer acknowledges that (1) the
Preferred Stock has not been and is not being registered under the provisions of
the 1933 Act and, except as provided in the Registration Rights Agreement, the
Shares have not been and are not being registered under the 1933 Act, and may
not be transferred unless (A) subsequently registered thereunder or (B) the
Buyer shall have delivered to the Company an opinion of counsel, reasonably
satisfactory in form, scope and substance to the Company and its legal counsel,
to the effect that the Securities to be sold or transferred may be sold or
transferred pursuant to an exemption from such registration; (2) any sale of the
Securities made in reliance on Rule 144 promulgated under the 1933 Act may be
made only in accordance with the terms of said Rule and further, if said Rule is
not applicable, any resale of such Securities under circumstances in which the
seller, or the person through whom the sale is made, may be deemed to be an
underwriter, as that term is used in the 1933 Act, may require compliance with
some other exemption under the 1933 Act or the rules and regulations of the SEC
thereunder; and (3) neither the Company nor any other person is under any
obligation to register the Securities (other than pursuant to the Registration
Rights Agreement) under the 1933 Act or to comply with the terms and conditions
of any exemption thereunder.

                  b. RESTRICTIVE LEGEND. The Buyer acknowledges and agrees that
the Preferred Stock and, until such time as the Common Stock has been issued or
resold pursuant to an effective registration statement under the 1933 Act as
contemplated by the Registration Rights Agreement and sold pursuant to an
effective Registration Statement, certificates and other instruments
representing any of the Securities shall bear a restrictive legend in
substantially the following form (and a stop-transfer order may be placed
against transfer of any such Securities):

                  THESE SECURITIES (THE "SECURITIES") HAVE NOT BEEN REGISTERED
                  UNDER THE SECURITIES ACT OF 1933, AS AMENDED (THE "SECURITIES
                  ACT"), OR THE SECURITIES LAWS OF ANY

                                       9
<PAGE>

                  STATE AND MAY NOT BE SOLD OR OFFERED FOR SALE IN THE ABSENCE
                  OF AN EFFECTIVE REGISTRATION STATEMENT FOR THE SECURITIES OR
                  AN OPINION OF COUNSEL OR OTHER EVIDENCE ACCEPTABLE TO THE
                  CORPORATION THAT SUCH REGISTRATION IS NOT REQUIRED.

                  c. REGISTRATION RIGHTS AGREEMENT. The parties hereto agree to
enter into the Registration Rights Agreement on or before the Closing Date.

                  d. FILINGS. The Company undertakes and agrees to make all
necessary filings in connection with the sale of the Preferred Stock to the
Buyer under any United States laws and regulations, or by any domestic
securities exchange or trading market, and to provide a copy thereof to the
Buyer promptly after such filing.

                  e. REPORTING STATUS. So long as the Buyer beneficially owns
any of the Preferred Stock, the Company shall file all reports required to be
filed with the SEC pursuant to Section 13 or 15(d) of the 1934 Act, and the
Company shall not terminate its status as an issuer required to file reports
under the 1934 Act even if the 1934 Act or the rules and regulations thereunder
would permit such termination.

                  f. USE OF PROCEEDS. The Company will use the proceeds from the
sale of the Preferred Stock (excluding amounts paid by the Company for legal
fees, finder's fees and escrow agent fees in connection with the sale of the
Preferred Stock) for general capital purposes and, without limiting the
foregoing, shall not, directly or indirectly, use any of such proceeds for
investment in any other affiliate which is not majority owned by the Company.

                  g. FUTURE PURCHASES. (i) Pursuant to Section 4.g. of that
certain Securities Purchase Agreement, dated as of March 3, 2000, by and between
the Company and Buyer (the "March Purchase Agreement"), Buyer agreed to purchase
Additional Common Stock (as defined in Section 4.g. of the March Purchase
Agreement) for an aggregate purchase price of up to $10,000,000.

                  (ii) Within three (3) business days after the Effective Date
of a Registration Statement covering both (A) the Registrable Securities
applicable to both the Tranche I Preferred (and Warrants issued in connection
therewith) and the Tranche II Preferred (and the Warrants issuable in connection
therewith) and (B) the Registrable Securities applicable to the preferred stock
and warrants purchased pursuant to the March Purchase Agreement, the Company
shall give a notice (the "Tranche II Notice") to the Buyer, with a copy to the
Escrow Agent, stating that said Registration Statement has been declared
effective. The date of the Tranche II (the "Tranch II Closing Date") shall be
five (5) business days after the date of the Tranche II Notice. If the Tranch II
Notice is not delivered to Buyer within 180 days after the date of this
Agreement, the Buyer's obligation to purchase the Tranche II Preferred shall
terminate.

                                       10
<PAGE>

                  (iii) Except as specifically provided in this Section 4(g),
the purchase and sale of Tranche II Preferred shall be conducted as if it were
the transactions referred to in the Transaction Agreements (other than this
Section 4(g)). By way of illustration, and not in limitation, of the foregoing,
each of the Company and the Buyer shall be deemed to have made all of the
representations, warranties and covenants set forth in the Transaction
Agreements as of the Tranche II Closing Date, all of the closing conditions set
forth in Sections 8 and 9 shall be satisfied and the terms of the Registration
Rights Agreement will apply to the Tranche II Preferred and the related
Warrants.

                  (iv) It shall be a condition to the Buyer's obligation to
purchase the Tranche II Preferred that, as of both the Tranche II Notice Date
and the Tranche II Closing Date, (A) the Registration Statement required to be
filed under the Registration Rights Agreement for all of the Registrable
Securities referred to in subsection (ii) above shall have been declared
effective and shall continue to be effective (and the Company's issuance of the
Tranche II Preferred shall constitute the Company's confirmation thereof as of
such date), (B) the representations and warranties of the Company contained in
Section 3 hereof shall be true and correct in all material respects (and the
Company's issuance of the Tranche II Preferred shall constitute the Company's
making each such representation and warranty as of such date) and there shall
have been no material adverse changes (financial or otherwise) in the business
or conditions of the Company from the initial Closing Date through and including
the Tranche II Closing Date (and the Company's issuance of the Tranche II
Preferred Stock shall constitute the Company's making such representation and
warranty as of such date) and (C) the Company shall cause its legal counsel to
issued an opinion letter substantially in the form of Annex III hereto.

                  (v) Except to the extent specifically contemplated by the
provisions of this Section 4(g), the closing of each Additional Tranche shall be
conducted upon the same terms and conditions as those applicable to the closing
held on the initial Closing Date.

                  (vi) The Buyer's obligation to purchase Tranche II Preferred
pursuant to this Section 4(g) shall be subject to the provisions of Section
2.i.

                  (vii) As of each Additional Closing Date, the Common Stock
shall be listed and traded on a national exchange, the "NASDAQ - Small Cap" or
"OTC - Bulletin Board."

                  h. CERTAIN AGREEMENTS. (i) The Company covenants and agrees
that it will not, without the prior written consent of the Buyer, enter into any
subsequent or further offer or sale of Common Stock or securities convertible
into Common Stock with any third party until one hundred eighty (180) days after
the Effective Date (as defined below).

                  (ii) The provisions of subparagraph (h)(i) will not apply to
(w) Common Stock issued as "restricted stock" as defined in SEC Rule 144,
provided the holder thereof holds such Common Stock for at least one year from
the date of issuance; (x) a secondary public offering of shares of Common Stock
at market; (y) an offering of convertible debentures or preferred stock at

                                       11
<PAGE>

market or above; or (z) the issuance of securities (other than for cash) in
connection with a merger, consolidation, sale of assets, disposition or the
exchange of the capital stock for assets, stock or other joint venture
interests; provided, such securities would not be included in the Registration
Statement relating to the Shares and a registration statement in respect of such
stock shall not be filed prior to sixty (60) days after the Effective Date.

                  (iii) The term "Effective Date" means the effective date of
the Registration Statement covering the Registrable Securities (as defined in
the Registration Rights Agreement).

                  (iv) In the event the Company breaches the provisions of this
Paragraph 4(h), the Conversion Price shall be amended to be the lessor of (i)
70% of the five (5) day average closing bid price for the five (5) consecutive
days immediately prior to the Conversion Notice, (ii) the five (5) day average
closing bid price for the five (5) consecutive days prior to Closing, and Buyer
may, within thirty (30) days after it receives written notice of such breach
from the Company, require the Company to immediately redeem all outstanding
Preferred Stock in accordance with Section 4(k)(y).

                  i. AVAILABLE SHARES. The Company shall have at all times
authorized and reserved for issuance, free from preemptive rights, shares of
Common Stock equal to two hundred percent (200%) of the number of shares of
Common Stock issuable upon conversion of all of the outstanding Preferred Stock,
and the exercise of the Warrants (as defined below).

                  j. WARRANTS. The Company agrees to issue to Buyer at the
Closing for (i) Tranche I, transferable divisable warrants with a "cashless"
exercise provision, for 50,000 shares of Common Stock (the "Tranche I
Warrants"), and (ii) Tranche II, transferable divisable warrants with a
"cashless" exercise provision (the "Tranche II Warrants"), for that number of
shares of Common Stock determined by (A) dividing 500,000 by an amount equal to
120% of the closing bid price of the Common Stock on the Closing Date (for
Tranche II), and rounding, if necessary, to the nearest whole number, and (B)
multiplying the result so obtained by 0.15. The Tranche I Warrants and the
Tranche II Warrants are sometimes hereinafter collectively referred to as the
"Warrants." The Tranche I Warrants shall bear an exercise price of $3.00 per
shares and the Tranche II Warrants shall bear an exercise price per share equal
to 120% of the closing bid price of the Common Stock on the Closing Date (for
Tranche II). The Warrants shall be exercisable immediately upon issuance, and
for a period of five (5) years thereafter, in the form annexed hereto as ANNEX
VI, together with piggy-back registration rights, and demand registration rights
under the Registration Rights Agreement.

                  k. LIMITATION ON ISSUANCE OF SHARES. The Certificate of
Designation for the Preferred Stock shall provide that the Company shall take
all steps reasonably necessary to be in a position to issue shares of Common
Stock on conversion of the Preferred Stock without violating the "Cap
Regulations". If despite taking such steps, the Company is limited in the number
of shares of Common Stock it may issue by the "Cap Regulations," to the extent
that the Company cannot issue such shares of Common Stock, due upon a Notice of
Conversion, without violating the Cap Regulations, the Company shall immediately
notify Buyer the number of shares of the Preferred Stock which are not
convertible as a result of said Cap Regulations (the "Unconverted Preferred

                                       12
<PAGE>

Stock") and within five (5) business days of the applicable Notice of Conversion
redeem the Unconverted Preferred Stock for an amount in cash (the "Redemption
Amount") equal to the "Economic Benefit" of such Unconverted Preferred Stock.
"ECONOMIC BENEFIT" for purposes of this Section 4.k. shall mean the dollar value
derived if such Unconverted Preferred Stock were converted into Common Stock as
set forth in the Notice of Conversion and the Common Stock was sold on the date
of the Notice of Conversion at the closing bid price of the Common Stock on the
date of the Notice of Conversion. The Certificate of Designation for the
Preferred Stock shall contain provisions substantially consistent with the above
terms, with such additional provisions as may be consented to by the Buyer. The
provisions of this section are not intended to limit the scope of the provisions
otherwise included in the Certificate of Designation.

                  L. RIGHT OF FIRST REFUSAL, SPECIAL DILUTION PROTECTION.

                  (i) The Company covenants and agrees that if during the period
from the date hereof through and including the date which is one hundred twenty
(120) days after the Effective Date of the First Registration Statement, the
Company offers to enter into any transaction (a "New Transaction") for the sale
of securities convertible into Company's Common Stock (or issues shares of
Common Stock with a "reset" provision whereby the Company issues additional
Common Stock depending on the future per share price of the Common Stock), the
Company shall notify the Buyer in writing of all of the terms of such offer (a
"New Transaction Offer"). The Buyer shall have the right (the "Right of First
Refusal"), exercisable by written notice given to the Company by the close of
business on the fifth business day after the Buyer's receipt of the New
Transaction Offer (the "Right of First Refusal Expiration Date"), to participate
in all or any part of the New Transaction Offer on the terms so specified.

                  (ii) If, and only if, the Buyer does not exercise the Right of
First Refusal in full, the Company may consummate the remaining portion of the
New Transaction with any New Investor on the terms specified in the New
Transaction Offer within thirty (30) days of the Right of First Refusal
Expiration Date.

                  (iii) If the terms of the New Transaction to be consummated
with such other party differ from the terms specified in the New Transaction
Offer so that the terms are more beneficial in any respect to the New Investor,
the Company shall give the Buyer a New Transaction Offer relating to the terms
of the New Transaction, as so changed, and the Buyer's Right of First Refusal
and the preceding terms of this paragraph (l) shall apply with respect to such
changed terms.

                  (iv) If there is more than one Buyer signatory to this
Agreement, the preceding provisions of this paragraph (l) shall apply pro rata
among them (based on their relative Buyer's Allocable Shares), except that, to
the extent any such Buyer does not exercise its Right of First Refusal in full
(a "Declining Buyer"), the remaining Buyer or Buyers who or which have exercised
their own Right of First Refusal in full, shall have the right (pro rata among
them based on their relative Buyer's Allocable Shares, if more than one) to
exercise all or a portion of such Declining Buyer's unexercised Right of
Refusal. Nothing in this paragraph (l) shall be deemed to permit a transaction
not otherwise permitted by subparagraph (g)(i), as modified by the provisions of
subparagraph (g)(ii).

                                       13
<PAGE>

                  (v) In the event the New Transaction is consummated with such
other third party on terms providing for (x) either a sale price equal to or
computed based on, or a determination of a conversion price based on, a lower
percentage of the then current market price (howsoever defined or computed) than
provided in the Certificate of Designation for determining the Conversion Rate
or a lower Base Price (howsoever defined or computed) and/or (y) the issuance of
warrants at an exercise price lower than that provided in the Warrants, the
terms of any unissued or unconverted Preferred Stock or any unissued or
unexercised Warrants shall be modified to reduce the relevant Conversion Rate,
Base Price or Warrant exercise price to be equal to that provided in the New
Transaction as so consummated.

                  m. REIMBURSEMENT. If (i) any Buyer, other than by reason of
its gross negligence or willful misconduct, becomes involved in any capacity in
any action, proceeding or investigation brought by any stockholder of the
Company, in connection with or as a result of the consummation of the
transactions contemplated by the Transaction Agreements, or if such Buyer is
impleaded in any such action, proceeding or investigation by any Person, or (ii)
any Buyer, other than by reason of its gross negligence or willful misconduct or
by reason of its trading of the Common Stock in a manner that is illegal under
the federal securities laws, becomes involved in any capacity in any action,
proceeding or investigation brought by the SEC against or involving the Company
or in connection with or as a result of the consummation of the transactions
contemplated by the Transaction Agreements, or if such Buyer is impleaded in any
such action, proceeding or investigation by any Person, then in any such case,
the Company will reimburse such Buyer for its reasonable legal and other
expenses (including the cost of any investigation and preparation) incurred in
connection therewith, as such expenses are incurred. In addition, other than
with respect to any matter in which such Buyer is a named party, the Company
will pay such Buyer the charges, as reasonably determined by such Buyer, for the
time of any officers or employees of such Buyer devoted to appearing and
preparing to appear as witnesses, assisting in preparation for hearings, trials
or pretrial matters, or otherwise with respect to inquiries, hearing, trials,
and other proceedings relating to the subject matter of this Agreement. The
reimbursement obligations of the Company under this paragraph shall be in
addition to any liability which the Company may otherwise have, shall extend
upon the same terms and conditions to any Affiliates of the Buyers who are
actually named in such action, proceeding or investigation, and partners,
directors, agents, employees and controlling persons (if any), as the case may
be, of the Buyers and any such Affiliate, and shall be binding upon and inure to
the benefit of any successors, assigns, heirs and personal representatives of
the Company, the Buyers and any such Affiliate and any such Person. The Company
also agrees that neither any Buyer nor any such Affiliate, partners, directors,
agents, employees or controlling persons shall have any liability to the Company
or any person asserting claims on behalf of or in right of the Company in
connection with or as a result of the consummation of the Transaction Agreements
except to the extent that any losses, claims, damages, liabilities or expenses
incurred by the Company result from the gross negligence or willful misconduct
of such Buyer.

                  5. TRANSFER AGENT INSTRUCTIONS.

                                       14
<PAGE>

                   a. Promptly following the delivery by the Buyer of the
aggregate purchase price for the Preferred Stock in accordance with Section 1(c)
hereof, the Company will irrevocably instruct its transfer agent to issue Common
Stock from time to time upon conversion of the Preferred Stock in such amounts
as specified from time to time by the Company to the transfer agent, bearing the
restrictive legend specified in Section 4(b) of this Agreement prior to
registration of the Shares under the 1933 Act, registered in the name of the
Buyer or its nominee and in such denominations to be specified by the Buyer in
connection with each conversion of the Preferred Stock. The Company warrants
that no instruction other than such instructions referred to in this Section 5
and stop transfer instructions to give effect to Section 4(a) hereof prior to
registration and sale of the Shares under the 1933 Act will be given by the
Company to the transfer agent and that the Shares shall otherwise be freely
transferable on the books and records of the Company as and to the extent
provided in this Agreement, the Registration Rights Agreement, and applicable
law. Nothing in this Section shall affect in any way the Buyer's obligations and
agreement to comply with all applicable securities laws upon resale of the
Securities. If the Buyer provides the Company with an opinion of counsel
reasonably satisfactory to the Company that registration of a resale by the
Buyer of any of the Securities in accordance with clause (1)(B) of Section 4(a)
of this Agreement is not required under the 1933 Act, the Company shall (except
as provided in clause (2) of Section 4(a) of this Agreement) permit the transfer
of the Securities and, in the case of the Shares, promptly instruct the
Company's transfer agent to issue one or more certificates for Common Stock
without legend in such name and in such denominations as specified by the Buyer.

                  b. (i) The Company will permit the Buyer to exercise its right
to convert the Preferred Stock by telecopying an executed and completed Notice
of Conversion (as defined in the Certificate of Designation) to the Company and
delivering within three (3) business days thereafter, the original Notice of
Conversion, together with the original share certificate, by express courier.

                           (ii) The term "Conversion Date" means, with respect
to any conversion elected by the holder of the Preferred Stock after the
Effective Date, the date specified in the Notice of Conversion, provided the
copy of the Notice of Conversion is telecopied to or otherwise delivered to the
Company in accordance with the provisions hereof so that is received by the
Company on or before such specified date. The Conversion Date for any mandatory
conversion at maturity shall be the Maturity Date of the Preferred Stock.

                           (iii) The Company shall, at its expense, take all
actions and use all means necessary and diligent to cause its transfer agent to
transmit the certificates representing the Shares issuable upon conversion of
any Preferred Stock (together with Preferred Stock not being so converted) to
the Buyer via express courier, by electronic transfer or otherwise, within three
(3) business days after receipt by the Company of the later of (i) receipt by
the Company of the copy of the original Notice of Conversion and share
certificate, and (ii) the Conversion Date (the "Delivery Date").

                  c. The Company understands that a delay in the issuance of the
Shares of Common Stock beyond the Delivery Date could result in economic loss to
the Buyer. As

                                       15
<PAGE>

compensation to the Buyer for such loss, the Company agrees to pay late payments
to the Buyer in the event that due entirely to the Company's failure to issue
and deliver the Shares upon Conversion in accordance with the following schedule
(where "No. Business Days Late" is defined as the number of business days beyond
five (5) business days from Delivery Date):

<TABLE>
<CAPTION>

                                                           Late Payment For Each $10,000
                                                          of Preferred Stock Liquidation
                           No. Business Days Late             Amount Being Converted
                           ----------------------         ------------------------------
                           <S>                            <C>
                                    1                             $100
                                    2                             $200
                                    3                             $300
                                    4                             $400
                                    5                             $500
                                    >5                            $500 +$200 for each Business
                                                                  Day Late beyond 5 days from
                                                                  The Delivery Date

</TABLE>

                  The Company shall pay any payments incurred under this Section
in immediately available funds upon demand. Nothing herein shall limit the
Buyer's right to pursue actual damages or to cause the Company to redeem the
Preferred Shares as provided below for the Company's actions or inactions
resulting in the transfer agent's failure to issue and deliver the Common Stock
to the Buyer. Furthermore, in addition to any other remedies which may be
available to the Buyer, in the event that the Company fails to deliver such
shares of Common Stock within five (5) business days after the Delivery Date,
the Buyer will be entitled to revoke the relevant Notice of Conversion by
delivering a notice to such effect to the Company whereupon the Company and the
Buyer shall each be restored to their respective positions immediately prior to
delivery of such Notice of Conversion. In the event the Company's actions or
inactions result in the transfer agent's failure to issue and deliver the Common
Stock to the Buyer within ten (10) days after the Delivery Date, Buyer may, at
its option, require the Company (without limiting its other remedies hereunder)
to immediately redeem all outstanding Preferred Stock in accordance with Section
4(k)(y).

                  d. If, by the relevant Delivery Date, the Company fails for
any reason to deliver the Shares to be issued upon conversion of the Preferred
Stock and after such Delivery Date, the holder of the Preferred Stock being
converted (a "Converting Holder") purchases, in an open market transaction or
otherwise, shares of Common Stock (the "Covering Shares") in order to make
delivery in satisfaction of a sale of Common Stock by the Converting Holder made
after a Conversion Date (the "Sold Shares"), which delivery such Converting
Holder anticipated to make using the Shares to be issued upon such conversion (a
"Buy-In"), the Company shall pay to the Converting Holder, in addition to all
other amounts contemplated in other provisions of the Transaction Agreements,
and not in lieu thereof, the Buy-In Adjustment Amount (as defined below). The
"Buy-In Adjustment Amount" is the amount equal to the excess, if any, of (x) the
Converting Holder's total purchase price (including brokerage commissions, if
any) for the Covering Shares over (y) the net proceeds (after

                                       16
<PAGE>

brokerage commissions, if any) received by the Converting Holder from the sale
of the Sold Shares. The Company shall pay the Buy-In Adjustment Amount to the
Buyer in immediately available funds immediately upon demand by the Converting
Holder. By way of illustration and not in limitation of the foregoing, if the
Converting Holder purchases shares of Common Stock having a total purchase price
(including brokerage commissions) of $11,000 to cover a Buy-In with respect to
shares of Common Stock it sold for net proceeds of $10,000, the Buy-In
Adjustment Amount which Company will be required to pay to the Converting Holder
will be $1,000. The remedies set forth in paragraphs 5(c) and (d) shall be
cumulative.

                  e. In lieu of delivering physical certificates representing
the unlegended securities issuable upon conversion, provided the Company's
transfer agent is participating in the Depository Trust Company ("DTC") Fast
Automated Securities Transfer program, upon request of the Buyer and its
compliance with the provisions contained in this paragraph, so long as the
certificates therefor do not bear a legend and the Buyer thereof is not
obligated to return such certificate for the placement of a legend thereon, the
Company shall use its best efforts to cause its transfer agent to electronically
transmit the Common Stock issuable upon conversion to the Buyer by crediting the
account of Buyer's Prime Broker with DTC through its Deposit Withdrawal Agent
Commission system.

                  f. The original certificate representing the Preferred Stock
shall be delivered by the Buyer to the Company simultaneous with the final
Notice of Conversion.

                  6. DELIVERY INSTRUCTIONS.

                  The Preferred Stock shall be delivered by the Company to the
Escrow Agent pursuant to Section 1(b) hereof, on a delivery against payment
basis, no later than on the Closing Date.

                  7. CLOSING DATE.

                  (i) The closing of the issuance and sale of the Preferred
Stock shall occur on the date (the "Closing Date") which is the first NYSE
trading day after the fulfillment or waiver of all closing conditions pursuant
to Sections 8 and 9 hereof or such other date and time as is mutually agreed
upon by the Company and the Buyer.

                  (ii) The closing of the purchase and issuance of Preferred
Stock shall occur on the Closing Date, at the offices of the Escrow Agent and
shall take place no later than 12:00 Noon, PST, on such day or such other time
as is mutually agreed upon by the Company and the Buyer.

                  (iii) Notwithstanding anything to the contrary contained
herein, the Escrow Agent will be authorized to release the Escrow Property (as
defined in the Escrow Agreement) only upon satisfaction of the conditions set
forth in Sections 8 and 9 hereof.

                  8. CONDITIONS TO THE COMPANY'S OBLIGATION TO SELL.

                                       17
<PAGE>

                  The Buyer understands that the Company's obligation to sell
the Preferred Stock on the Closing Date and to the Buyer pursuant to this
Agreement is conditioned upon:

                  a. The receipt and acceptance by the Buyer of this Agreement
as evidenced by execution of this Agreement by the Buyer for One Million Five
Hundred Thousand Dollars ($1,500,000) in principal amount of the Preferred
Stock;

                  b. Delivery by the Buyer to the Escrow Agent of good funds as
payment in full of an amount equal to the Purchase Price for the Tranche I
Preferred in accordance with Section 1(c) hereof (less $1,000,000 previously
delivered to Company by Buyer);

                  c. The accuracy on the Closing Date of the representations and
warranties of the Buyer contained in this Agreement as if made on the Closing
Date, and the performance by the Buyer on or before the Closing Date of all
covenants and agreements of the Buyer required to be performed on or before the
Closing Date;

                  d. There shall not be in effect any law, rule or regulation
prohibiting or restricting the transactions contemplated hereby, or requiring
any consent or approval which shall not have been obtained.

                  9. CONDITIONS TO THE BUYER'S OBLIGATION TO PURCHASE.

                  The Company understands that the Buyer's obligation to
purchase the Preferred Stock on the Closing Date is conditioned upon:

                  a. Acceptance by the Company of this Agreement for the sale of
Preferred Stock, as indicated by execution of this Agreement;

                  b. Delivery by the Company to the Escrow Agent of the
appropriate Preferred Stock in accordance with this Agreement;

                  c. The accuracy in all material respects on the Closing Date
of the representations and warranties of the Company contained in this Agreement
as if made on the Closing Date and the performance by the Company on or before
the Closing Date of all covenants and agreements of the Company required to be
performed on or before the Closing Date and as to Preferred Stock, the
conditions set forth in Paragraph 4g; and

                  d. On the Closing Date, Buyer having received (i) an opinion
of counsel for the Company, dated the Closing Date, in form, scope and substance
reasonably satisfactory to the Buyer, to the effect set forth in ANNEX III
attached hereto, (ii) the Registration Rights Agreement annexed hereto as ANNEX
IV and the Warrants.

                                       18
<PAGE>

                  e. No statute, rule, regulation, executive order, decree,
ruling or injunction shall be enacted, entered, promulgated or endorsed by any
court or governmental authority of competent jurisdiction which prohibits or
adversely effects any of the transactions contemplated by this Agreement or the
Transaction Documents, and no proceeding or investigation shall have been
commenced or threatened which may have the effect of prohibiting or adversely
effecting any of the transactions contemplated by this Agreement or the
Transaction Documents.

                  f. From and after the date hereof to and including the Closing
Date, the trading of the Common Stock shall not have been suspended by the SEC,
or the NASD and trading in securities generally on the New York Stock Exchange,
NASDAQ/Small Cap, or Bulletin Board, as applicable, shall not have been
suspended or limited, nor shall minimum prices been established for securities
traded on NASDAQ/Small Cap or Bulletin Board, as applicable, nor shall there be
any outbreak or escalation of hostilities involving the United States or any
material adverse change in any financial market that in either case in the
reasonable judgment of the Buyer makes it impracticable or inadvisable to
purchase the Preferred Stock.

                  10. GOVERNING LAW;  MISCELLANEOUS.

                  a. This Agreement and all agreements entered into in
connection herewith shall be governed by and interpreted in accordance with the
laws of the State of California for contracts to be wholly performed in such
state and without giving effect to the principles thereof regarding the conflict
of laws. Any litigation based thereon, or arising out of, under, or in
connection with, this agreement or any course of conduct, course of dealing,
statements (whether oral or written) or actions of the Company or Buyer shall be
brought and maintained exclusively in the state or Federal courts of the State
of California, sitting in the City of Los Angeles. The Company hereby expressly
and irrevocably submits to the jurisdiction of the state and federal Courts of
the State of California for the purpose of any such litigation as set forth
above and irrevocably agrees to be bound by any final judgment rendered thereby
in connection with such litigation. The Company further irrevocably consents to
the service of process by registered mail, postage prepaid, or by personal
service within or without the State of California. The Company hereby expressly
and irrevocably waives, to the fullest extent permitted by law, any objection
which it may have or hereafter may have to the laying of venue of any such
litigation brought in any such court referred to above and any claim that any
such litigation has been brought in any inconvenient forum. To the extent that
the Company has or hereafter may acquire any immunity from jurisdiction of any
court or from any legal process (whether through service or notice, attachment
prior to judgment, attachment in aid of execution or otherwise) with respect to
itself or its property, the Company hereby irrevocably waives such immunity in
respect of its obligations under this Agreement and the related agreements
entered into in connection herewith.

                  b. A facsimile transmission of this signed Agreement shall be
legal and binding on all parties hereto.

                  c. This Agreement may be signed in one or more counterparts,
each of which shall be deemed an original.

                                       19
<PAGE>

                  d. The headings of this Agreement are for convenience of
reference and shall not form part of, or affect the interpretation of, this
Agreement.

                  e. If any provision of this Agreement shall be invalid or
unenforceable in any jurisdiction, such invalidity or unenforceability shall not
affect the validity or enforceability of the remainder of this Agreement or the
validity or enforceability of this Agreement in any other jurisdiction.

                   f. This Agreement may be amended only by an instrument in
writing signed by the party to be charged with enforcement thereof.

                  g. This Agreement supersedes all prior agreements and
understandings among the parties hereto with respect to the subject matter
hereof.

                  h. Except as otherwise set forth herein, all costs and
expenses, including reasonable attorneys' fees, incurred by the Buyer in the
enforcement of this Agreement or any agreements related thereto, shall be paid
by the Company upon demand.

                  11. NOTICES. Any notice or communication required or permitted
by this Agreement shall be given in writing addressed as follows:

         COMPANY:          Mobile P.E.T. Systems, Inc.
                           2240 Shelter Island Drive
                           San Diego, CA  92106
                           ATTN: CEO
                           Telephone No.: (619) 226-6738
                           Telecopier No.: (619) 226-6889

                           with a copy to:

                           John Mann, Esq.
                           1330 Post Oak Boulevard, Suite 2800
                           Houston, Texas  77056
                           Telephone: (713) 622-7114
                           Facsimile: (713) 622-8281

         BUYER:            At the address set forth on the signature page of
                           this Agreement.

                                       20
<PAGE>

         ESCROW AGENT:     Law Offices of Michael S. Rosenblum
                           1875 Century Park East, Suite 700
                           Los Angeles, CA  90067
                           Telecopier No. (310) 286-3010
                           Telephone No. (310) 286-2100

All notices shall be served personally by telecopy, by telex, by overnight
express mail service or other overnight courier, or by first class registered or
certified mail, postage prepaid, return receipt requested. If served personally,
or by telecopy, notice shall be deemed delivered upon receipt (provided that if
served by telecopy, sender has written confirmation of delivery); if served by
overnight express mail or overnight courier, notice shall be deemed delivered
forty-eight (48) hours after deposit; and if served by first class mail, notice
shall be deemed delivered seventy-two (72) hours after mailing. Any party may
give written notification to the other parties of any change of address for the
sending of notices, pursuant to any method provided for herein.

                  12. SURVIVAL OF REPRESENTATIONS AND WARRANTIES. The Company's
representations and warranties herein shall survive the execution and delivery
of this Agreement and the delivery of the Preferred Stock and the Purchase
Price, and shall inure to the benefit of the Buyer and its successors and
assigns.

                  [REMAINDER OF PAGE INTENTIONALLY LEFT BLANK]

                                       21
<PAGE>

NUMBER OF SHARES OF PREFERRED STOCK TO BE PURCHASED:          30*

AGGREGATE PURCHASE PRICE OF SUCH PREFERRED STOCK:    $1,500,000*
*20 shares in the Tranche I Closing and 10 shares in the Tranche II Closing

                             SIGNATURES FOR ENTITIES

         IN WITNESS WHEREOF, the undersigned represents that the foregoing
statements are true and correct and that it has caused this Securities Purchase
Agreement to be duly executed on its behalf as of this 25th day of
September, 2000.

                                       Printed Names of Buyers

                                       By: See Annexed
                                       -------------------------------------
                                       (Signature of Authorized Person)

                                       -------------------------------------
                                       Printed Name and Title

 As of the date set forth below, the undersigned hereby accepts this Agreement
and represents that the foregoing statements are true and correct and that it
has caused this Securities Purchase Agreement to be duly executed on its behalf.

MOBILE P.E.T. SYSTEMS, INC., a Delaware corporation

By:       /s/ Paul Crowe
         -----------------------------
          President/CEO
Title:   -----------------------------

Date:     September 25, 2000
         -----------------------------

<PAGE>

                             ANNEX TO SIGNATURE PAGE

AMOUNT            SHARES

$1,500,000        30                        York, LLC, a Cayman Islands
                                            limited liability company

                                            By:
                                               ---------------------------------
                                                           Manager

ADDRESS:   c/o Thomson Kernaghan & Co.
           365 Bay Street, Suite 1000, 10th Fl.
           Toronto, Ontario M5H 2V2
           Telephone No.:  (416) 860-4160
           Telecopier No.: (416) 860-8313

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