EXHIBIT 3.1
 
                 AMENDED AND RESTATED ARTICLES OF INCORPORATION

                                       OF

                               ADAC LABORATORIES
                           (a California corporation)


                                   ARTICLE I

     The name of this corporation is:   ADAC Laboratories

                                   ARTICLE II

     The purpose of the Corporation is to engage in any lawful act or activity
for which a corporation may be organized under the General Corporation Law of
California other than the banking business, the trust company business or the
practice of a profession permitted to be incorporated by the California
Corporations Code.

                                  ARTICLE III

     This Corporation is authorized to issue two classes of stock, without par
value, to be designated "Preferred Stock" and "Common Stock," respectively.  The
total number of shares of which this Corporation is authorized to issue is
55,000,000 shares, of which 50,000,000 shares shall be Common Stock and
5,000,000 shares shall be Preferred Stock.  The Preferred Stock may be issued
from time to time in one or more series.  The Board of Directors of this
Corporation is authorized to determine or alter the rights, preferences,
privileges and restrictions granted to or imposed upon any wholly unissued
series of Preferred Stock, and within the limitations or restrictions stated in
any resolution or resolutions of the Board of Directors originally fixing the
number of shares constituting any series, to increase or decrease (but not below
the number of shares of any such series subsequent to the issue of shares of
that series, to determine the designation of any series and to fix the number of
shares of any series.
 
                                   ARTICLE IV

     This Corporation hereby states the designation and number of shares, and
fixes the relative rights, preferences, privileges and restrictions of the
Series A Junior Participating Preferred Stock (which are in addition to the
provisions set forth in Article III above which are applicable to the Preferred
Stock of all classes and series), as follows:

          SECTION 1.  DESIGNATION AND AMOUNT.  Two Hundred Fifty Thousand
(250,000) shares of Preferred Stock, without par value, are designated "Series A
Junior Participating Preferred Stock" with the rights, preferences, privileges
and restriction 

 
specified herein (the "Junior Preferred Stock"). Such number of shares may be
increased or decreased by resolution of the Board of Directors, provided, that
no decrease shall reduce the number of shares of Junior Preferred Stock to a
number less than the number of shares then outstanding plus the number of shares
reserved for issuance upon the exercise of outstanding options, rights or
warrants or upon the conversion of any outstanding options, rights or warrants
or upon the conversion of any outstanding securities issued by the Corporation
convertible into Junior Preferred Stock.

          SECTION 2.  DIVIDENDS AND DISTRIBUTIONS.

          (A) Subject to the rights of the holders of any shares of any series
          of Preferred Stock (or any similar stock) ranking prior and superior
          to the Junior Preferred Stock with respect to dividends, the holders
          of shares of Junior Preferred Stock, in preference to the holders of
          Common Stock, without par value (the "Common Stock"), of the
          Corporation, and of any other junior stock, shall be entitled to
          receive, when, as and if declared by the Board of Directors out of
          funds legally available for the purpose, quarterly dividends payable
          in cash on the first day of March, June, September and December in
          each year (each such date being referred to herein as a "Quarterly
          Dividend Payment Date"), commencing on the first Quarterly Dividend
          Payment Date after the first issuance of a share or fraction of a
          share of Junior Preferred Stock, in an amount per share (rounded to
          the nearest cent) equal to the greater of (a) $1.00 or (b) subject to
          the provision for adjustment hereinafter set forth, 100 times the
          aggregate per share amount of all cash dividends, and 100 times the
          aggregate per share amount (payable in kind) of all non-cash dividends
          or other distributions, other than a dividend payable in shares of
          Common Stock or a subdivision of the outstanding shares of Common
          Stock (by reclassification or otherwise) declared on the Common Stock
          since the immediately preceding Quarterly Dividend Payment Date or,
          with respect to the first Quarterly Dividend Payment Date, since the
          first issuance of any share or fraction of a share of Junior Preferred
          Stock. In the event the Corporation shall at any time declare or pay
          any dividend on the Common Stock payable in shares of Common Stock, or
          effect a subdivision or combination or consolidation of the
          outstanding shares of Common Stock (by reclassification or otherwise
          than by payment of a dividend in shares of Common Stock) into a
          greater or lesser number of shares of Common Stock, then in each such
          case the amount to which holders of shares of Junior Preferred Stock
          were entitled immediately prior to such event under clause (b) of the
          preceding sentence shall be adjusted by multiplying such amount by a
          fraction, the numerator of which is the number of shares of Common
          Stock outstanding immediately after such event and the denominator of
          which is the number of shares of Common Stock that were outstanding
          immediately prior to such event.

 
          (B) The Corporation shall declare a dividend or distribution on the
          Junior Preferred Stock as provided in paragraph (A) of this Section
          immediately after it declares a dividend or distribution on the Common
          Stock (other than a dividend payable in shares of common Stock);
          provided that, in the event no dividend or distribution shall have
          been declared on the Common Stock during the period between any
          Quarterly Dividend Payment Date and the next subsequent Quarterly
          Dividend Payment Date, a dividend of $1.00 per share on the Junior
          Preferred Stock shall nevertheless be payable on such subsequent
          Quarterly Dividend Payment Date.

          (C) DIVIDENDS shall begin to accrue and be cumulative on outstanding
          shares of Junior Preferred Stock from the Quarterly Dividend Payment
          Date next preceding the date of issue of such shares, unless the date
          of issue of such shares is prior to the record date for the first
          Quarterly Dividend Payment Date, in which case dividends on such
          shares shall begin to accrue from the date of issue of such shares, or
          unless the date of issue is a Quarterly Dividend Payment Date or is a
          date after the record date for the determination of holders of shares
          of Junior preferred Stock entitled to receive a quarterly dividend and
          before such Quarterly Dividend Payment Date, in either of which events
          such dividends shall begin to accrue and be cumulative from such
          Quarterly Dividend Payment Date.  Accrued but unpaid dividends shall
          not bear interest.  Dividends paid on the shares of Junior Preferred
          Stock in an amount less than the total amount of such dividends at the
          time accrued and payable on such shares shall be allocated pro rata on
          a share-by-share basis among all such shares at the time outstanding.
          The Board of Directors may fix a record date for the determination of
          holders of shares of Junior Preferred Stock entitled to receive
          payment of a dividend or distribution declared thereon, which record
          date shall be not more than 60 days prior to the date fixed for the
          payment thereof.

               SECTION 3.  VOTING RIGHTS.  The holders of shares of Junior
Preferred Stock shall have the following voting rights:

          (A) Subject to the provision for adjustment hereinafter set forth,
          each share of Junior Preferred Stock shall entitle the holder thereof
          to 100 votes on all matters submitted to a vote of the shareholders of
          the Corporation.  In the event the Corporation shall at any time
          declare or pay any dividend on the Common Stock payable in shares of
          Common Stock, or effect a subdivision or combination or consolidation
          of the outstanding shares of Common Stock (by re-classification or
          otherwise than by payment of a dividend in shares of Common Stock)
          into a greater or lesser number of shares of Common Stock, then in
          each such case the number of votes per share to which holders of
          shares of Junior Preferred Stock were entitled 

 
          immediately prior to such event shall be adjusted by multiplying such
          number by a fraction, the numerator of which is the number of shares
          of Common Stock outstanding immediately after such event and the
          denominator of which is the number of shares of Common Stock that were
          outstanding immediately prior to such event.

          (B) Except as otherwise provided herein, in any Certificate of
          Determination of Preferences creating a series of Preferred Stock or
          any similar stock, or by law, the holders of shares of Junior
          Preferred Stock and the holders of shares of Common Stock and any
          other capital stock of the Corporation having general voting rights
          shall vote together as one class on all matters submitted to a vote of
          shareholders of the Corporation.

          (C) Except as set forth herein, or as otherwise provided by law,
          holders of Junior Preferred Stock shall have no special voting rights
          and their consent shall not be required (except to the extent they are
          entitled to vote with holders of Common Stock as set forth herein) for
          taking any corporate action.

          SECTION 4.  CERTAIN RESTRICTIONS.

          (A) Whenever quarterly dividends or other dividends or distributions
          payable on the Junior Preferred Stock as provided in Section 2 are in
          arrears, thereafter and until all accrued and unpaid dividends and
          distributions, whether or not declared, on shares of Junior Preferred
          Stock outstanding shall have been paid in full, the Corporation shall
          not:

                    (i)   declare or pay dividends, or make any other
                    distributions, on any shares of stock ranking junior (either
                    as to dividends or upon liquidation, dissolution or winding
                    up) to the Junior Preferred Stock;

                    (ii)  declare or pay dividends, or make any other
                    distributions, on any shares of stock ranking on a parity
                    (either as to dividends or upon liquidation, dissolution or
                    winding up) with the Junior Preferred Stock, except
                    dividends paid ratably o the Junior Preferred Stock and all
                    such parity stock on which dividends are payable or in
                    arrears in proportion to the total amounts to which the
                    holders of all such shares are then entitled.

                    (iii) redeem or purchase or otherwise acquire for
                    consideration shares of any stock ranking junior (either as
                    to dividends or upon liquidation, dissolution or winding up)
                    to the Junior Preferred Stock, provided that the Corporation

 
                    may at any time redeem, purchase or otherwise acquire shares
                    of any such junior stock in exchange for shares of any stock
                    of the Corporation ranking junior (either as to dividends or
                    upon dissolution, liquidation or winding up) to the Junior
                    Preferred Stock; or

                    (iv) redeem or purchase or otherwise acquire for
                    consideration any shares of Junior Preferred Stock, or any
                    shares of stock ranking on a parity with the Junior
                    Preferred Stock, except in accordance with a purchase offer
                    made in writing or by publication (as determined by the
                    Board of Directors) to all holders of such shares upon such
                    terms as the Board of Directors, after consideration of the
                    respective annual dividend rates and other relative rights
                    and preferences of the respective series and classes, shall
                    determine in good faith will result in fair and equitable
                    treatment among the respective series or classes.

          (B) The Corporation shall not permit any subsidiary of the Corporation
          to purchase or otherwise acquire for consideration any shares of stock
          of the Corporation unless the Corporation could, under paragraph (A)
          of this Section 4, purchase or otherwise acquire such shares at such
          time and in such manner.

          SECTION 5.  REACQUIRED SHARES.  Any shares of Junior Preferred Stock
purchased or otherwise acquired by the Corporation in any manner whatsoever
shall be retired and cancelled promptly after the acquisition thereof.  All such
shares shall upon their cancellation become authorized but unissued shares of
Preferred Stock and may be reissued as part of a new series of Preferred Stock
subject to the conditions and restrictions on issuance set forth herein, or in
any Certificate of Determination of Preferences creating a series of Preferred
Stock or any similar stock or as otherwise required by law.

          SECTION 6.  LIQUIDATION, DISSOLUTION OR WINDING UP.  Upon any
liquidation, dissolution or winding up of the Corporation, no distribution shall
be made (1) to the holders of shares of stock ranking junior (either as to
dividends or upon liquidation, dissolution or winding up) to the Junior
Preferred Stock unless, prior thereto, the holders of shares of Junior Preferred
Stock shall have received the greater of:  (A) $100 per share, plus an amount
equal to accrued and unpaid dividends and distributions thereon, whether or not
declared, to the date of such payment; or (B) an aggregate amount per share,
subject to the provision for adjustment hereinafter set forth, equal to 100
times the aggregate amount to be distributed per share to holders of shares of
Common Stock, or (2) to the holders of shares of stock ranking on a parity
(either as to dividends or upon liquidation, dissolution or winding up) with the
Junior Preferred Stock, except distributions made ratably on the Junior
Preferred Stock and all such parity stock in 

 
proportion to the total amounts to which the holders of all such shares are
entitled upon such liquidation, dissolution or winding up. In the event the
Corporation shall at any time declare or pay any dividend on the Common Stock
payable in shares of Common Stock, or effect a subdivision or combination or
consolidation of the outstanding shares of Common Stock (by reclassification or
otherwise than by payment of a dividend in shares of Common Stock) into a
greater or lesser number of shares of Common Stock, then in each such case the
aggregate amount to which holders of shares of Junior Preferred Stock were
entitled immediately prior to such event under the proviso in clause (1) of the
preceding sentence shall be adjusted by multiplying such amount by a fraction
the numerator of which is the number of shares of Common Stock outstanding
immediately after such event and the denominator of which is the number of
shares of Common Stock that were outstanding immediately prior to such event.

          SECTION 7.  CONSOLIDATION, MERGER, ETC.    In case the Corporation
shall enter into any consolidation, merger, combination or other transaction in
which the shares of Common Stock are exchanged for or changed into other stock
or securities, cash and/or any other property, then in any such case each share
of Junior Preferred Stock shall at the same time be similarly exchanged or
changed into an amount per share, subject to the provision for adjustment
hereinafter set forth, equal to 100 times the aggregate amount of stock,
securities, cash and/or any other property (payable in kind), as the case may
be, into which or for which each share of Common Stock is changed or exchanged.
In the event the Corporation shall at any time declare or pay any dividend on
the Common Stock payable in shares of common Stock, or effect a subdivision or
combination or consolidation of the outstanding shares of Common Stock (by
reclassification or otherwise than by payment of a dividend in shares of Common
Stock) into a greater or lesser number of shares of Common Stock, then in each
such case the amount set forth in the preceding sentence with respect to the
exchange or change of shares of Junior Preferred Stock shall be adjusted by
multiplying such amount by a fraction, the numerator of which is the number of
shares of Common Stock outstanding immediately after such event and the
denominator of which is the number of shares of Common Stock that were
outstanding immediately prior to such event.
 
          SECTION 8.  NO REDEMPTION.   The shares of Junior Preferred Stock
shall not be redeemable.
 
          SECTION 9.  RANK.   The Junior Preferred Stock shall rank, with
respect to the payment of dividends and the distribution of assets, junior to
all other series of the Corporation's Preferred Stock.
 
          SECTION 10.  AMENDMENT.  The Articles of Incorporation of the
Corporation shall not be amended in any manner which would materially alter or
change the powers, preferences or special rights of the Junior Preferred Stock
so as to affect them adversely without the affirmative vote of the holders of at
least two-thirds of the outstanding shares of Junior Preferred Stock, voting
together as a single class.

 
                                   ARTICLE V

     The Corporation hereby elects to be governed by all the provisions of the
General Corporation Law of the State of California in effect as of January 1,
1977, which are not otherwise applicable to it pursuant to Chapter 23 of said
law.


                                   ARTICLE VI

     The liability of the directors of the Corporation for monetary damages
shall be eliminated to the fullest extent permissible under California law.


                                   ARTICLE VI

     The Corporation is authorized to provide indemnification of Agents (as
defined in Section 317 of the Corporations Code) for breach of duty to the
Corporation and its shareholders through By-law provisions, agreements with the
Agents, vote of shareholders or disinterested directors or otherwise in excess
of the indemnification otherwise permitted by Section 317 of the Corporations
Code), subject to the limits on such excess indemnification set forth in Section
204 of the Corporations Code or as to circumstances in which indemnity is
expressly prohibited by Section 317.