BORROWER SECURITY AGREEMENT
      THIS BORROWER SECURITY AGREEMENT, dated as of September [A], 1999 is
executed by ADAC LABORATORIES, a California corporation ("Borrower"), in favor
of ABN AMRO BANK N.V., a Netherlands public company acting through its San
Francisco Representative Office, acting as agent (in such capacity, "Agent") for
the financial institutions which are from time to time parties to the Credit
Agreement referred to in Recital A below (collectively, the "Lenders").
                                     RECITALS
      A. Pursuant to an Amended and Restated Credit Agreement, dated as of March
29, 1999, as amended by that certain First Amendment to Amended and Restated
Credit Agreement dated as of August 17, 1999 (as amended, and as further amended
from time to time, the "Credit Agreement"), among Borrower, the Lenders and
Agent, the Lenders have agreed to extend certain credit facilities to Borrower
upon the terms and subject to the conditions set forth therein.
      B. The Lenders' obligations to continue extend the credit facilities to
Borrower under the Credit Agreement are subject, among other conditions, to
receipt by Agent of this Security Agreement, duly executed by Borrower.
                                     AGREEMENT
      NOW, THEREFORE, in consideration of the above recitals and for other good
and valuable consideration, the receipt and adequacy of which are hereby
acknowledged, Borrower hereby agrees with Agent, for the ratable benefit of the
Lenders and Agent, as follows:
      1. Definitions and Interpretation. When used in this Security Agreement,
the following terms shall have the following respective meanings:
           "Account Debtor" shall have the meaning given to that term in
      subparagraph 3(g) hereof.
           "Agent" shall have the meaning given to that term in the introductory
      paragraph hereof.
           "Borrower" shall have the meaning given to that term in the
      introductory paragraph hereof.
           "Collateral" shall have the meaning given to that term in paragraph 2
      hereof.
                                       H-1-1
           "Collateral Certificate" shall have the meaning given to that term in
      the Credit Agreement.
           "Credit Agreement" shall have the meaning given to that term in
      Recital A hereof.
           "Depositary Bank" shall have the meaning given to that term in
      subparagraph 4(e) hereof.
"Equipment" shall have the meaning given to that term in Attachment 1
      hereto.
           "Intermediary" shall have the meaning given to that term in
      subparagraph 4(f) hereof.
           "Inventory" shall have the meaning given to that term in Attachment 1
      hereto.
           "Lenders" shall have the meaning given to that term in the
      introductory paragraph hereof.
           "Receivables" shall have the meaning given to that term in Attachment
      1 hereto.
           "Related Contracts" shall have the meaning given to that term in
      Attachment 1 hereto.
           "Secured Obligations" shall have the meaning given to that term in the
      Credit Agreement.
           "UCC" shall mean the Uniform Commercial Code as in effect in the State
      of California from time to time.
Unless otherwise defined herein, all other capitalized terms used herein and
defined in the Credit Agreement shall have the respective meanings given to
those terms in the Credit Agreement, and all terms defined in the UCC shall have
the respective meanings given to those terms in the UCC.  The rules of
construction set forth in Section I of the Credit Agreement shall, to the extent
not inconsistent with the terms of this Security Agreement, apply to this
Security Agreement and are hereby incorporated by reference.
      2. Grant of Security Interest. As security for the Secured Obligations,
Borrower hereby pledges and assigns to Agent (for the ratable benefit of the
Lenders and Agent) and grants to Agent (for the ratable benefit of the Lenders
and Agent) a security interest in all right, title and interest of Borrower in
and to the property described in Attachment 1 hereto, whether now owned or
hereafter
                                      H-1-2
acquired (collectively and severally, the "Collateral"), which Attachment 1 is
incorporated herein by this reference.
      3. Representations and Warranties. Borrower represents and warrants to the
Lenders and Agent as follows:
           (a) Borrower is the legal and beneficial owner of the Collateral (or,
      in the case of after-acquired Collateral, at the time Borrower acquires
      rights in the Collateral, will be the legal and beneficial owner thereof).
      No other Person has (or, in the case of after-acquired Collateral, at the
      time Borrower acquires rights therein, will have) any right, title, claim
      or interest (by way of Lien, purchase option or otherwise) in, against or
      to the Collateral, other than Permitted Liens.
           (b) Agent has (or in the case of after-acquired Collateral, at the
time Borrower acquires rights therein, will have) a first priority
      perfected security interest in the Collateral to the extent that a security
      interest in such Collateral can be perfected by the filing of a financing
      statement, and a security interest in all other Collateral, subject to no
      other Liens except for Permitted Liens.
           (c) All Equipment and Inventory are (i) located at the locations
      indicated in item 8 of the Collateral Certificate, (ii) in transit to such
      locations or (iii) in transit to a third party purchaser which will become
      obligated on a Receivable to Borrower upon receipt. Except for Equipment
      and Inventory referred to in clauses (ii) and (iii) of the preceding
      sentence, Borrower has exclusive possession and control of the Inventory
      and Equipment.
           (d) All Inventory has been (or, in the case of hereafter produced
      Inventory, will be) produced in compliance with all applicable Governmental
      Rules, including the Fair Labor Standards Act (if applicable).
           (e) Borrower keeps all records concerning the Receivables and the
      originals of all Related Contracts at its chief executive office located at
      the address set forth in item 2 of the Collateral Certificate.
           (f) Each Receivable is genuine and enforceable against the party
      obligated to pay the same (an "Account Debtor") free from any right of
      rescission, defense, setoff or discount.
           (g) Each insurance policy maintained by Borrower is validly existing
      and is in full force and effect. Borrower is not in default in any material
      respect under the provisions of any insurance policy, and there are no
      facts which, with the giving of notice or passage of time (or both), would
      result in such a default under any provision of any such insurance policy.
                                      H-1-3
           (h) The information set forth in the Collateral Certificate is true,
      correct and accurate.
      4. Covenants. Borrower hereby agrees as follows:
           (a) Borrower, at Borrower's expense, shall promptly procure, execute
      and deliver to Agent all documents, instruments and agreements and perform
      all acts which are necessary, or which Agent may reasonably request, to
      establish, maintain, preserve, protect and perfect the Collateral, the Lien
      granted to Agent therein and the first priority of such Lien (subject to
      Permitted Liens) or to enable Agent to exercise and enforce its rights and
      remedies hereunder with respect to any Collateral. Without limiting the
      generality of the preceding sentence, Borrower shall (i) procure, execute
      and deliver to Agent all stock powers, endorsements, assignments, financing
      statements and other instruments of transfer requested by Agent, (ii)
      deliver to Agent promptly upon receipt all originals of Collateral
      consisting of instruments, documents and chattel paper in amounts exceeding
      $1,000,000 (provided, however that upon the occurrence of a Default, if
      requested by Agent, Borrower shall deliver to Agent promptly upon receipt
      all originals of Collateral consisting of instruments, documents and
      chattel paper in amounts of less than $1,000,000 but exceeding $100,000)
      and (iii) take such actions as may be necessary or reasonably requested by
Agent to perfect the Lien of Agent in any Collateral consisting of
      investment property (including taking the actions required by Subparagraph
      4(f) hereof and, in those jurisdictions where appropriate, causing such
      Liens to be recorded or registered in the books of any financial
      intermediary or clearing corporation requested by Agent).
           (b) Borrower shall not use or permit any Collateral to be used in
      violation of (i) any provision of the Credit Agreement, this Security
      Agreement or any other Security Document, (ii) any applicable Governmental
      Rule where such use might have a Material Adverse Effect, or (iii) any
      policy of insurance covering the Collateral.
           (c) Borrower shall pay promptly when due all taxes and other
      governmental charges, all Liens and all other charges now or hereafter
      imposed upon, relating to or affecting any Collateral.
           (d) Without thirty (30) days prior written notice to Agent, Borrower
      shall not (i) change Borrower's name or place of business (or, if Borrower
      has more than one place of business, its chief executive office), or the
      office in which Borrower's records relating to Receivables or the originals
      of Related Contracts are kept, (ii) keep Collateral consisting of chattel
      paper and documents at any location other than its chief executive office
      set forth in item 2 of the Collateral Certificate, or (iii) keep Collateral
                                      H-1-4
      consisting of Equipment, Inventory or other goods at any location other
      than the locations set forth in item 8 of the Collateral Certificate.
           (e) For each deposit account maintained by Borrower, Borrower shall
      (i) execute and deliver to the bank or other depository institution at
      which such deposit account is maintained (the "Depositary Bank") a Notice
      of Security Interest in the form of Attachment 2 hereto and (ii) use its
      best efforts to cause the Depositary Bank to execute and deliver to Agent
      an Acknowledgment and Agreement in the form set forth in such Notice of
      Security Interest (or in any other form acceptable to Agent in its sole
      discretion). Without ten (10) days prior written notice to Agent, Borrower
      shall not establish any deposit account not set forth in item 15 of the
      Collateral Certificate.
           (f) For each securities account and commodity account maintained by
      Borrower, Borrower shall (i) complete, execute and deliver to the bank,
      broker or other Person at which such account is maintained (the
      "Intermediary") a Notice of Security Interest in the form of Attachment 3
      hereto and (ii) cause the Intermediary to execute and deliver to Agent an
      Acknowledgment and Agreement in the form set forth in such Notice of
      Security Interest (or in any other form acceptable to Agent in its sole
      discretion). Without thirty (30) days prior written notice to Agent,
      Borrower shall not establish any securities account or commodity account
      not set forth in item 16 of the Collateral Certificate.
           (g) If requested by Agent, Borrower shall deposit, or cause to be
      deposited, all remittances, checks and other funds (in whatever form)
      received with respect to Receivables to a deposit account for which
      Borrower has complied with subparagraph 4(e) above and in which Agent has a
      first priority perfected security interest.
(h) Borrower shall appear in and defend any action or proceeding which
      may affect its title to or Agent's interest in the Collateral if an adverse
      decision is reasonably likely to have a Material Adverse Effect.
           (i) If Agent gives value to enable Borrower to acquire rights in or
      the use of any Collateral, Borrower shall use such value for such purpose.
           (j) Borrower shall keep separate, accurate and complete records of the
      Collateral and shall provide Agent with such records and such other reports
      and information relating to the Collateral as Agent may reasonably request
      from time to time.
           (k) Borrower shall not surrender or lose possession of (other than to
      Agent), sell, encumber, lease, rent, option, or otherwise dispose of or
      transfer any Collateral or right or interest therein except as permitted in
      the
                                      H-1-5
      Credit Agreement, and Borrower shall keep the Collateral free of all Liens
      except Permitted Liens.
           (l) Borrower shall, if requested by Agent, type, print or stamp
      conspicuously on the face of all original copies of all Collateral
      consisting of chattel paper and documents in excess of $100,000 not in the
      possession of Agent a legend satisfactory to Agent indicating that such
      chattel paper and documents are subject to the security interest granted
      hereby.
           (m) Borrower shall collect, enforce and receive delivery of the
      Receivables in accordance with past practice until otherwise notified by
      Agent.
           (n) Borrower shall comply with all material Requirements of Law
      applicable to Borrower which relate to the production, possession,
      operation, maintenance and control of the Collateral (including, without
      limitation, the Fair Labor Standards Act).
           (o) Borrower shall (i) carry and maintain insurance on the Collateral
      as required pursuant to Subparagraph 5.01(c) of the Credit Agreement, (ii)
      deliver to Agent from time to time, as Agent may request, schedules setting
      forth all insurance then in effect, and (iii) deliver to Agent copies of
      each policy of insurance which replaces, or evidences the renewal of, each
      existing policy of insurance at least fifteen (15) days prior to the
      expiration of such policy. Agent shall be named as additional insured or
      additional loss payee, as appropriate, on all liability and property
      insurance of Borrower and such policies shall contain such additional
      endorsements as shall be required by Agent. Prior to the occurrence and the
      continuance of an Event of Default, all proceeds of any property insurance
      paid as a result of any event or occurrence shall be paid to Borrower. All
      proceeds of any property insurance paid after the occurrence and during the
      continuance of an Event of Default shall be paid to Agent to be held as
      Collateral and applied as provided in the Credit Agreement or, at the
      election of the Required Lenders, returned to Borrower.
5. Authorized Action by Agent. Borrower hereby irrevocably appoints Agent
as its attorney-in-fact and agrees that Agent may perform (but Agent shall not
be obligated to and shall incur no liability to Borrower or any third party for
failure so to do) any act which Borrower is obligated by this Security Agreement
to perform, and to exercise such rights and powers as Borrower might exercise
with respect to the Collateral, including, without limitation, the right to (a)
collect by legal proceedings or otherwise and endorse, receive and receipt for
all dividends, interest, payments, proceeds and other sums and property now or
hereafter payable on or on account of the Collateral; (b) enter into any
extension, reorganization, deposit, merger, consolidation or other agreement
pertaining to, or deposit,
                                      H-1-6
surrender, accept, hold or apply other property in exchange for the Collateral;
(c) insure, process, preserve and enforce the Collateral; (d) make any
compromise or settlement, and take any action it deems advisable, with respect
to the Collateral; (e) pay any Indebtedness of Borrower relating to the
Collateral; and (f) execute UCC financing statements and other documents,
instruments and agreements required hereunder; provided, however, that Agent
shall not act pursuant to this appointment or otherwise hereunder unless an
Event of Default has occurred and is continuing. Borrower agrees to reimburse
Agent upon demand for all reasonable costs and expenses, including attorneys'
fees, Agent may incur while acting as Borrower's attorney-in-fact hereunder, all
of which costs and expenses are included in the Secured Obligations. Borrower
agrees that such care as Agent gives to the safekeeping of its own property of
like kind shall constitute reasonable care of the Collateral when in Agent's
possession; provided, however, that Agent shall not be required to make any
presentment, demand or protest, or give any notice and need not take any action
to preserve any rights against any prior party or any other Person in connection
with the Secured Obligations or with respect to the Collateral.
      6. Default and Remedies. Borrower shall be deemed in default under this
Security Agreement upon the occurrence and during the continuance of an Event of
Default, as that term is defined in the Credit Agreement. In addition to all
other rights and remedies granted to Agent by this Security Agreement, the
Credit Agreement, the other Credit Documents, the UCC and other applicable
Governmental Rules, Agent may, upon the occurrence and during the continuance of
any Event of Default, exercise any one or more of the following rights and
remedies: (a) collect, receive, appropriate or realize upon the Collateral or
otherwise foreclose or enforce Agent's security interests in any or all
Collateral in any manner permitted by applicable Governmental Rules or in this
Security Agreement; (b) notify any or all Account Debtors to make payments on
Receivables directly to Agent; (c) direct any Depositary Bank or Intermediary to
liquidate the account(s) maintained by it, pay all amounts payable in connection
therewith to Agent and/or deliver any proceeds thereof to Agent; (d) sell or
otherwise dispose of any or all Collateral at one or more public or private
sales, whether or not such Collateral is present at the place of sale, for cash
or credit or future delivery, on such terms and in such manner as Agent may
determine; (e) require Borrower to assemble the Collateral and make it available
to Agent at a place to be designated by Agent; (f) enter onto any property where
any Collateral is located and take possession thereof with or without judicial
process; and (g) prior to the disposition of the Collateral, store, process,
repair or recondition any Collateral consisting of goods, perform any
obligations and enforce any rights of Borrower under any Related Contracts or
otherwise prepare and preserve Collateral for disposition in any manner and to
the extent Agent deems appropriate. In furtherance of Agent's rights hereunder,
Borrower hereby grants to Agent an irrevocable, non-exclusive license
(exercisable without royalty or other payment by Agent) to use, license or
sublicense any patent, trademark, tradename, copyright or other intellectual
property in which Borrower now or hereafter has any right, title or interest,
together with the right of access to
                                      H-1-7
all media in which any of the foregoing may be recorded or stored. In any case
where notice of any sale or disposition of any Collateral is required, Borrower
hereby agrees that seven (7) days notice of such sale or disposition is
reasonable.
      7. MISCELLANEOUS.
           (a) Notices. Except as otherwise specified herein, all notices,
      requests, demands, consents, instructions or other communications to or
      upon Borrower or Agent under this Security Agreement shall be given as
      provided in Paragraph 8.01 of the Credit Agreement.
           (b) Waivers; Amendments. Any term, covenant, agreement or condition of
      this Security Agreement may be amended or waived only as provided in the
      Credit Agreement. No failure or delay by Agent or any Lender in exercising
      any right hereunder shall operate as a waiver thereof or of any other right
      nor shall any single or partial exercise of any such right preclude any
      other further exercise thereof or of any other right. Unless otherwise
      specified in any such waiver or consent, a waiver or consent given
      hereunder shall be effective only in the specific instance and for the
      specific purpose for which given.
           (c) Successors and Assigns. This Security Agreement shall be binding
      upon and inure to the benefit of Agent, the Lenders and Borrower and their
      respective successors and assigns; provided, however, that Agent, the
      Lenders and Borrower may sell, assign and delegate their respective rights
      and obligations hereunder only as permitted by the Credit Agreement. Agent
      and the Lenders may disclose this Security Agreement as provided in the
      Credit Agreement.
           (d) Partial Invalidity. If at any time any provision of this Security
      Agreement is or becomes illegal, invalid or unenforceable in any respect
      under the law or any jurisdiction, neither the legality, validity or
      enforceability of the remaining provisions of this Security Agreement nor
      the legality, validity or enforceability of such provision under the law of
      any other jurisdiction shall in any way be affected or impaired thereby.
           (e) Cumulative Rights, etc. The rights, powers and remedies of Agent
      and the Lenders under this Security Agreement shall be in addition to all
      rights, powers and remedies given to Agent and the Lenders by virtue of any
      applicable Governmental Rule, the Credit Agreement, any other Credit
      Document or any other agreement, all of which rights, powers, and remedies
      shall be cumulative and may be exercised successively or concurrently
      without impairing Agent's rights hereunder. Borrower waives any right to
      require Agent or any Lender to proceed against any Person or to exhaust any
      Collateral or to pursue any remedy in Agent's or such Lender's power.
H-1-8
           (f) Payments Free of Taxes, Etc. All payments made by Borrower under
      this Security Agreement shall be made by Borrower free and clear of and
      without deduction for any and all present and future taxes, levies,
      charges, deductions and withholdings. In addition, Borrower shall pay upon
      demand any stamp or other taxes, levies or charges of any jurisdiction with
      respect to the execution, delivery, registration, performance and
      enforcement of this Security Agreement. Upon request by Agent, Borrower
      shall furnish evidence satisfactory to Agent that all requisite
      authorizations and approvals by, and notices to and filings with,
      governmental authorities and regulatory bodies have been obtained and made
      and that all requisite taxes, levies and charges have been paid.
           (g) Borrower's Continuing Liability. Notwithstanding any provision of
      this Security Agreement or any other Credit Document or any exercise by
      Agent of any of its rights hereunder or thereunder (including, without
      limitation, any right to collect or enforce any Collateral), (i) Borrower
      shall remain liable to perform its obligations and duties in connection
      with the Collateral (including, without limitation, the Related Contracts
      and all other agreements relating to the Collateral) and (ii) neither Agent
      nor any Lender shall assume any liability to perform such obligations and
      duties or to enforce any of Borrower's rights in connection with the
      Collateral (including, without limitation, the Related Contracts and all
      other agreements relating to the Collateral).
           (h) Governing Law. This Security Agreement shall be governed by and
      construed in accordance with the laws of the State of California without
      reference to conflicts of law rules (except to the extent otherwise
      provided in the UCC).
                                      H-1-9
      IN WITNESS WHEREOF, Borrower has caused this Security Agreement to be
executed as of the day and year first above written.
                                    ADAC LABORATORIES
                                    By:
                                       ------------------------------------------
                                         Name:
                                              -----------------------------------
                                         Title:
                                               ----------------------------------
                                      H-1-10
                                   ATTACHMENT 1
                               TO SECURITY AGREEMENT
      All right, title and interest of Borrower, whether now owned or hereafter
acquired, in and to the following:
(a) All equipment and fixtures (including, without limitation, all
diagnostic imaging equipment, furniture, vehicles and other machinery and office
equipment), together with all additions and accessions thereto and replacements
therefor (collectively, the "Equipment");
      (b) All inventory (including, without limitation, (i) all raw materials,
work in process and finished goods and (ii) all such goods which are returned to
or repossessed by Borrower), together with all additions and accessions thereto,
replacements therefor, products thereof and documents therefor (collectively,
the "Inventory");
      (c) All accounts, chattel paper, instruments, deposit accounts and other
rights to the payment of money (including, without limitation, general
intangibles and contract rights) (collectively, the "Receivables") and all
contracts, security agreements, leases, guaranties and other agreements
evidencing, securing or otherwise relating to the Receivables (collectively, the
"Related Contracts");
      (d) All certificated and uncertificated securities, security entitlements,
securities accounts, commodity contracts, commodity accounts and other
investment property;
      (e) All other general intangibles and contract rights not otherwise
described above (including, without limitation, (i) customer and supplier lists
and contracts, books and records, insurance policies, tax refunds, contracts for
the purchase of real or personal property; (ii) all patents, copyrights,
trademarks, tradenames and service marks, (iii) all licenses to use,
applications for, and other rights to, such patents, copyrights, trademarks,
tradenames and service marks, and (iv) all goodwill of Borrower);
      (f) All other property not otherwise described above (including, without
limitation, all money, letters of credit, documents and goods); and
      (g) All proceeds of the foregoing (including, without limitation, whatever
is receivable or received when Collateral or proceeds is sold, collected,
exchanged, returned, substituted or otherwise disposed of, whether such
disposition is voluntary or involuntary, including rights to payment and return
premiums and insurance proceeds under insurance with respect to any Collateral,
and all rights to payment with respect to any cause of action affecting or
relating to the Collateral).
                                     H-1[1]-1
                                   ATTACHMENT 2
                               TO SECURITY AGREEMENT
                            NOTICE OF SECURITY INTEREST
                                        IN
                                  DEPOSIT ACCOUNT
                             __________, [19__] [20__]
[Name of Depositary Bank]
[Address of Depositary Bank]
           ADAC LABORATORIES, a California corporation ("Borrower") and ABN AMRO
      BANK N.V., a Netherlands public company acting through its San Francisco
      Representative Office, acting as agent for certain financial institutions
      (in such capacity, "Agent"), under that certain Amended and Restated Credit
      Agreement dated as of March 29, 1999 (the "Credit Agreement"), hereby
      notify you that Borrower has granted to Agent a security interest in all
      deposit accounts maintained by Borrower with you including, without
      limitation, the deposit accounts described below:
      Account            Depositor's              Account
       Number              Name                    Type
      Borrower and Agent authorize you to continue to allow Borrower to make
      deposits to, draw checks upon and otherwise withdraw funds from such
      deposit accounts (the "Deposit Accounts") without the consent of Agent
      until Agent shall instruct you otherwise.
           Borrower has authorized Agent to inform you when an Event of Default
      (as defined in the Credit Agreement) has occurred and is continuing and at
      such time instruct you to cease to permit any further payments or
      withdrawals from the Deposit Accounts by Borrower and/or to pay any or all
      amounts in the Deposit Accounts to Agent. Borrower authorizes and directs
      you to comply with all such instructions received by you from Agent without
      further inquiry on your part and
                                     H-1[2]-1
      hereby agrees to indemnify and hold harmless you and your officers,
      directors and employees from and for any compliance by you with such
      instructions.
                                    ADAC LABORATORIES
                                    By:
                                       ------------------------------------------
                                         Name:
                                              -----------------------------------
                                         Title:
                                               ----------------------------------
                                    ABN AMRO BANK N.V.,
                                    as Agent
                                    By:
                                       ------------------------------------------
                                         Name:
                                              -----------------------------------
                                         Title:
                                               ----------------------------------
ACKNOWLEDGEMENT AND AGREEMENT
                                OF DEPOSITARY BANK
      The undersigned depositary bank hereby acknowledges receipt of the above
notice and agrees with Borrower and Agent to comply with any instruction it may
receive from Agent in accordance therewith. The undersigned confirms to Agent
that the information set forth above regarding the Deposit Accounts is accurate,
that such Deposit Accounts are currently open and that the undersigned has no
prior notice of any other security interest, lien or interest in such Deposit
Accounts. The undersigned waives any right of setoff except for its right or
recoupment for returned items.
                                    By:
                                       ------------------------------------------
                                         Name:
                                              -----------------------------------
                                         Title:
                                               ----------------------------------
                                     H-1[2]-3
                                   ATTACHMENT 3
                               TO SECURITY AGREEMENT
                            NOTICE OF SECURITY INTEREST
                                        IN
                          [SECURITIES][COMMODITY] ACCOUNT
                           __________ __, [19__] [2000]
[Name of Intermediary]
[Address of Intermediary]
      ADAC LABORATORIES, a California corporation ("Borrower") and ABN AMRO BANK
N.V., a Netherlands public company acting through its San Francisco
Representative Office, acting as agent for certain financial institutions (in
such capacity, "Agent"), under that certain Amended and Restated Credit
Agreement dated as of March 29, 1999 (the "Credit Agreement"), hereby notify you
that Borrower has granted to Agent a security interest in all
[securities][commodity] accounts maintained by Borrower with you including,
without limitation, the accounts described below:
          Account Number      Account Holder's  Name       Account  Type
         ________________        ________________        ________________
________________        ________________        ________________
         ________________        ________________        ________________
Until Agent shall instruct you otherwise pursuant to the following paragraph,
Borrower and Agent authorize you, without the consent of Agent, to continue to
comply with all directions of Borrower regarding the purchase, sale, transfer or
redemption of all securities, security entitlements, other investment property
and other financial assets for and in such accounts (the "Accounts").
      Borrower has authorized Agent to inform you when an Event of Default (as
defined in the Credit Agreement) has occurred and is continuing and at such time
direct you to cease to comply with any further directions of Borrower with
respect to the Accounts. After your receipt of any such notice, Borrower
authorizes and directs you, without the consent of Borrower or further inquiry
on your part, to comply with all directions of Agent
                                     H-1[3]-1
regarding the Accounts, including, without limitation, any direction to (a)
purchase, sell, transfer or redeem any or of all securities, security
entitlements, other investment property or other financial assets for and in the
Accounts, (b) withdraw any or all funds from the Accounts and pay such funds to
Agent or any person designated by Agent or (c) transfer any or all of the
Accounts to the name of Agent or any person designated by Agent. Borrower hereby
agrees to indemnify and hold harmless you and your officers, directors and
employees from and for any compliance by you with such directions of Agent.
                                    ADAC LABORATORIES
                                    By:
                                       ------------------------------------------
                                         Name:
                                              -----------------------------------
                                         Title:
                                               ----------------------------------
                                    ABN AMRO BANK N.V.,
                                    as Agent
                                    By:
                                       ------------------------------------------
                                         Name:
                                              -----------------------------------
                                         Title:
                                               ----------------------------------
                                     H-1[3]-2
                           ACKNOWLEDGEMENT AND AGREEMENT
                                  OF INTERMEDIARY
      The undersigned institution hereby acknowledges receipt of the above notice
and agrees with Borrower and Agent to comply with any direction it may receive
from Agent in accordance therewith without the consent of Borrower or further
inquiry.  The undersigned confirms to Agent that the information set forth above
regarding the Accounts is accurate, that such Accounts are currently open and
that the undersigned has no prior notice of any other security interest, lien or
interest in such Accounts.  The undersigned agrees that any lien or right of
setoff it may have in or against the accounts is subordinate to the security
interest of Agent therein.
                                    By:
                                       ------------------------------------------
                                         Name:
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                                         Title:
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