HOLOGIC, INC.
                              
                    AMENDED AND RESTATED
                 1999 EQUITY INCENTIVE PLAN

Section 1.  Purpose

      The  purpose of the Hologic, Inc. Amended and Restated
1999  Equity  Incentive Plan (the "Plan") is to attract  and
retain employees and directors, to provide an incentive  for
them  to assist Hologic, Inc. (the "Corporation") to achieve
long-range  performance  goals,  and  to  enable   them   to
participate in the long-term growth of the Corporation.

Section 2.  Definitions

(a)   "Affiliate"  means any business entity  in  which  the
  Corporation owns directly or indirectly 50% or more of the
  total combined voting power or has a significant financial
  interest as determined by the Committee.

(b)    "Annual   Meeting"  means  the  annual   meeting   of
  shareholders or special meeting in lieu of annual meeting of
  shareholders at which one or more directors are elected.

(c)  "Award" means any Option awarded under the Plan.

(d)     "Board"  means  the  Board  of  Directors   of   the
  Corporation.

(e)   "Code"  means the Internal Revenue Code  of  1986,  as
  amended from time to time.

(f)   "Committee"  means the Compensation Committee  of  the
  Board, or such other committee of not less than two members
  of the Board appointed by the Board to administer the Plan,
  provided that the members of such Committee must  be  Non-
  Employee Directors as defined in Rule 16b-3(b) promulgated
  under the Securities Exchange Act of 1934, as amended.

(g)   "Common Stock" or "Stock" means the Common Stock,  par
  value $.01 per share, of the Corporation.

(h)  "Corporation" means Hologic, Inc.

(i)    "Designated   Beneficiary"  means   the   beneficiary
  designated by a Participant, in a manner determined by the
  Board,  to receive amounts due or exercise rights  of  the
  Participant in the event of the Participant's death.  In the
  absence  of  an  effective designation by  a  Participant,
  Designated Beneficiary shall mean the Participant's estate.

(j)    "Eligible  Director"  means  each  director  of   the
  Corporation who is not then an employee of the Corporation
  or  affiliated  with any holder of more  than  5%  of  the
  outstanding voting stock of the Corporation.

(k)   "Fair  Market  Value" means, with  respect  to  Common
  Stock, the last sale price of the Common Stock as reported
  on the National Association of Securities Dealers Automated
  Quotation  System  ("NASDAQ") or on a national  securities
  exchange on which the Common Stock may be traded on the date
  of  the  granting of the Award, or if such date is  not  a
  business day, the first business day preceding such grant.
  If the Common Stock is not publicly traded, the fair market
  value shall mean the fair market value of the Common Stock
  as determined by the Board of Directors.

(l)   "Incentive Stock Option" means an option  to  purchase
  shares  of  Common  Stock, awarded to a Participant  under
  Section  6, which is intended to meet the requirements  of
  Section 422 of the Code or any successor provision.

(m)  "Nonqualified Stock Option" means an option to purchase
  shares  of  Common  Stock, awarded to a Participant  under
  Section  6 or Section 7, which is not intended  to  be  an
  Incentive Stock Option.

(n)    "Option"  means  an  Incentive  Stock  Option  or   a
  Nonqualified Stock Option.

(o)   "Participant" means a person selected by the Board  to
  receive an Award under the Plan.

Section 3.  Administration

      The Plan shall be administered by the Board, or if the
Board  so determines, by the Committee. The Committee  shall
serve  at the pleasure of the Board, which may from time  to
time,  and  in  its sole discretion, discharge  any  member,
appoint  additional  new members in substitution  for  those
previously  appointed and/or fill vacancies however  caused.
A  majority  of the Committee shall constitute a quorum  and
the acts of a majority of the members present at any meeting
at  which a quorum is present shall be deemed the action  of
the  Committee.   The Board, including the Committee,  shall
have   authority   to   adopt,   alter   and   repeal   such
administrative rules, guidelines and practices governing the
operation of the Plan as it shall from time to time consider
advisable, and to interpret the provisions of the Plan.  The
Board's decisions shall be final and binding.  To the extent
permitted by applicable law, the Board may delegate  to  the
Committee the power to make Awards to Participants  and  all
determinations   under  the  Plan  with   respect   thereto.
Administration of the automatic option grant  provisions  of
the  Plan  shall  be self-executing in accordance  with  the
provisions  of Section 7 hereof, and neither the  Board  nor
the  Committee  shall  exercise any discretionary  functions
with  respect  to the Option grants made pursuant  to  those
provisions of the Plan, except in the event that  the  Board
approves  the  grant  of  Awards  in  addition  to,  or   in
substitution for, those provided for in Section 7.

Section 4.  Eligibility

      All  employees and, in the case of Awards  other  than
Incentive Stock Options, directors of the Corporation or any
Affiliate  capable  of  contributing  significantly  to  the
successful  performance  of the Corporation,  other  than  a
person  who has irrevocably elected not to be eligible,  are
eligible to be Participants in the Plan.

Section 5.  Stock Available for Awards

(a)  Subject to adjustment under subsection (b), the maximum
  aggregate  number of shares of Common Stock available  for
  issuance under the Plan is 300,000 shares, plus an  annual
  increase  to be made on the first day of each fiscal  year
  equal to the lesser of (a) 2 1/2% of the Issued Shares (as
  defined below) on the last day of the immediately preceding
  fiscal year, (b) 500,000 shares, or (c) an amount determined
  by  the  Board.  "Issued Shares" shall mean the number  of
  shares  of Common Stock of the Company outstanding on  the
  last day of the immediately preceding fiscal year, plus any
  shares reacquired by the Company during the fiscal year that
  ends  on such date.  If any Award in respect of shares  of
  Common  Stock expires or is terminated unexercised  or  is
  forfeited for any reason or settled in a manner that results
  in  fewer  shares outstanding than were initially awarded,
  including  without limitation the surrender of  shares  in
  payment  for the Award or any tax obligation thereon,  the
  shares subject to such Award or so surrendered, as the case
  may  be,  to  the extent of such expiration,  termination,
  forfeiture or decrease, shall again be available for award
  under the Plan, subject, however, in the case of Incentive
  Stock  Options, to any limitation required under the Code.
  Common Stock issued through the assumption or substitution
  of outstanding grants from an acquired corporation shall not
  reduce  the  shares available for Awards under  the  Plan.
  Shares issued under the Plan may consist in whole or in part
  of authorized but unissued shares or treasury shares.

(b)   In  the event that the Board determines that any stock
  dividend, extraordinary cash dividend, creation of a class
  of  equity  securities, recapitalization,  reorganization,
  merger,  consolidation,  split-up, spin-off,  combination,
  exchange of shares, warrants or rights offering to purchase
  Common  Stock at a price substantially below  fair  market
  value, or other similar transaction affects the Common Stock
  such that an adjustment is required in order to preserve the
  benefits or potential benefits intended to be made available
  under  the Plan, then the Board, subject, in the  case  of
  Incentive Stock Options, to any limitation required  under
  the  Code,  shall equitably adjust any or all of  (i)  the
  number and kind of shares in respect of which Awards may be
  made  under the Plan, (ii) the number and kind  of  shares
  subject to outstanding Awards, (iii) the number and kind of
  shares  for which automatic option grants are to  be  made
  pursuant to Section 7 hereof, and (iv) the award, exercise
  or  conversion price with respect to any of the foregoing,
  and if considered appropriate, the Board may make provision
  for  a  cash payment with respect to an outstanding Award,
  provided  that the number of shares subject to  any  Award
  shall always be a whole number.

Section 6.  Stock Options

(a)   Subject  to the provisions of the Plan, the Board  may
  award Incentive Stock Options and Nonqualified Stock Options
  and  determine the number of shares to be covered by  each
  Option,  the option price therefor and the conditions  and
  limitations applicable to the exercise of the Option.  The
  terms  and conditions of Incentive Stock Options shall  be
  subject to and comply with Section 422 of the Code, or any
  successor provision, and any regulations thereunder.

(b)   The Board shall establish the option price at the time
  each Option is awarded, which shall not be less than 100% of
  the  Fair Market Value of the Common Stock on the date  of
  award.

(c)   Each  Option  shall be exercisable at such  times  and
  subject  to  such terms and conditions as  the  Board  may
  specify in the applicable Award or thereafter.  The  Board
  may impose such conditions with respect to the exercise of
  Options, including conditions relating to applicable federal
  or  state  securities laws, as it considers  necessary  or
  advisable.

(d)   No  shares shall be delivered pursuant to any exercise
  of  an  Option  until payment in full of the option  price
  therefor is received by the Corporation.  Such payment may
  be  made  in  whole or in part in cash or, to  the  extent
  permitted by the Board at or after the award of the Option,
  by delivery of a note or shares of Common Stock owned by the
  optionholder, provided, however, that the optionholder must
  have owned at least such number of shares for at least six
  months,  valued at their Fair Market Value on the date  of
  delivery,  by the reduction of the shares of Common  Stock
  that  the  optionholder would be entitled to receive  upon
  exercise  of  the  Option  provided,  however,  that   the
  optionholder must have owned at least the number of shares
  by which the Common Stock is being reduced for at least six
  months, such shares to be valued at their Fair Market Value
  on  the  date of exercise, less their option price (a  so-
  called   "cashless  exercise"),  or  such   other   lawful
  consideration as the Board may determine.  In addition, to
  the  extent  permitted by the Board, an  optionholder  may
  engage in a successive exchange (or series of exchanges) in
  which the shares of Common Stock that such optionholder is
  entitled to receive upon the exercise of an Option may  be
  simultaneously utilized as payment for the exercise of  an
  additional Option or Options, provided, however, that  the
  optionholder must have owned at least the number of shares
  to be used as payment for at least six months.

(e)   The  Board may provide for the automatic award  of  an
  Option  upon the delivery of shares to the Corporation  in
  payment  of  an Option for up to the number of  shares  so
  delivered.

(f)   In  the  case of Incentive Stock Options the following
  additional  conditions shall apply to the extent  required
  under Section 422 of the Code for the options to qualify as
  Incentive Stock Options:

   (i)  Such options shall be granted only to employees of the
      Corporation, and shall not be granted to any person who owns
      stock that possesses more than ten percent of the total
      combined voting power of all classes of stock  of  the
      Corporation or of its parent or subsidiary corporation (as
      those terms are defined in Section 422(b) of the Internal
      Revenue  Code of 1986, as amended, and the regulations
      promulgated thereunder), unless, at the time of such grant,
      the exercise price of such option is at least 110% of the
      fair market value of the stock that is subject to such
      option and the option shall not be exercisable more than
      five years after the date of grant;
   
   (ii)  The  option  price with respect to Incentive  Stock
      Options shall not be less than 100% of the Fair Market Value
      of the Common Stock on the date of award.
   
   (iii)       Such  options  shall,  by  their  terms,   be
      transferable by the optionholder only by the laws of descent
      and distribution, and shall be exercisable only by such
      optionholder during his lifetime.
   
   (iv) Such options shall not be granted more than ten years
      from  the effective date of the Plan and shall not  be
      exercisable more than ten years from the date of grant.
   
   (v)  To the extent that the aggregate Fair Market Value of
      Common Stock with respect to which Incentive Stock Options
      (determined without regard to this section) are exercisable
      for the first time by any employee Participant during any
      calendar year exceeds $100,000 (or such other amount as may
      be proscribed by the Code), such Incentive Stock Options
      shall be treated as options which are not Incentive Stock
      Options.

Section 7.  Options Granted to Non-Employee Directors

(a)  Each Eligible Director shall automatically be granted a
  Nonqualified Option to acquire 25,000 shares of Common Stock
  effective as of the date he or she is first elected to the
  Board or, with respect to Eligible Directors serving on the
  Board as of the Effective Date of the Plan, as of the date
  of the 1999 Annual Meeting of the Corporation, in each case,
  the option price for which shall be the Fair Market Value of
  the  Common Stock on such date and the expiration of which
  shall be the tenth anniversary thereof.  Each Nonqualified
  Option  issued pursuant to this Section 7(a) shall  become
  exercisable in 20% installments beginning on January 1  of
  the  first year after the grant date, and on January 1  of
  each year thereafter, until such option is fully exercisable
  on January 1 of the fifth year following the grant date.

(b)  Each Eligible Director who has served as a Director for
  six  months  shall automatically be granted a Nonqualified
  Option to acquire 3,000 shares of Common Stock as of January
  1 of each year, beginning with January 1, 2000, the option
  price for which shall be the Fair Market Value of the Common
  Stock on such date and the expiration of which shall be the
  tenth anniversary thereof.  Each Nonqualified Option granted
  pursuant to this Section 7(b) may be exercised on and after
  the date that is six months after the date of grant.

(c)  In addition, the Board may provide for such other terms
  and  conditions  of the Options granted pursuant  to  this
  Section 7 as it may determine in its sole discretion and as
  shall  be  set forth in the applicable Option  agreements,
  including, without limitation, acceleration of exercise upon
  a  change of control, termination of the Options, and  the
  effect  on such Options of the death, retirement or  other
  termination of service as a director of the option holder.
  Notwithstanding  anything to the contrary  in  this  Plan,
  nothing  herein shall permit the Board to grant Awards  to
  such  non-employee directors in addition to those provided
  for in this Section 7.

Section 8.   General Provisions Applicable to Awards

(a)   Documentation.   Each Award under the  Plan  shall  be
  evidenced by a written document delivered to the Participant
  specifying the terms and conditions thereof and containing
  such other terms and conditions not inconsistent with  the
  provisions of the Plan as the Board considers necessary or
  advisable to achieve the purposes of the Plan or comply with
  applicable   tax   and  regulatory  laws  and   accounting
  principles.

(b)   Securities  Laws.   The Participant  shall  make  such
  representations and furnish such information as may, in the
  opinion of counsel for the Corporation, be appropriate  to
  permit  the Corporation to issue or transfer the Stock  in
  compliance  with the provisions of applicable  federal  or
  state securities laws.  The Corporation, in its discretion,
  may  postpone the issuance and delivery of any Stock until
  completion of such registration or other qualification  of
  such  shares  under any federal or state  laws,  or  stock
  exchange   listing   as  the  Corporation   may   consider
  appropriate.  The Corporation may require that prior to the
  issuance or transfer of Stock, the Participant enter into a
  written  agreement  to  comply with  any  restrictions  on
  subsequent disposition that the Corporation deems necessary
  or  advisable  under  any  applicable  federal  and  state
  securities laws.  Certificates of Stock issued hereunder may
  be legended to reflect such restrictions.

(c)   Board  Discretion.  Each type of  Award  may  be  made
  alone, in addition to or in relation to any other type  of
  Award.   The  terms  of each type of  Award  need  not  be
  identical,  and  the  Board need  not  treat  Participants
  uniformly.  Except as otherwise provided by the Plan or  a
  particular Award, any determination with respect to an Award
  may be made by the Board at the time of award or at any time
  thereafter.  Without limiting the foregoing, an Award may be
  made  by  the  Board, in its discretion,  to  any  401(k),
  savings, pension, profit sharing or other similar plan  of
  the  Corporation in lieu of or in addition to any cash  or
  other  property contributed or to be contributed  to  such
  plan.

(d)  Settlement.  The Board shall determine whether Awards
are settled in whole or in part in cash, Common Stock, other
securities of the Corporation, Awards, other property or
such other methods as the Board may deem appropriate.  The
Board may permit a Participant to defer all or any portion
of a payment under the Plan, including the crediting of
interest on deferred amounts denominated in cash and
dividend equivalents on amounts denominated in Common Stock.
If shares of Common Stock are to be used in payment pursuant
to an Award and such shares were acquired upon the exercise
of a stock option (whether or not granted under this Plan),
such shares must have been held by the Participant for at
least six months.

(e)  Dividends and Cash Awards.  In the discretion of the
Board, any Award under the Plan may provide the Participant
with (i) dividends or dividend equivalents payable currently
or deferred with or without interest, and (ii) cash payments
in lieu of or in addition to an Award.

(f)  Termination of Employment.  The Board shall determine
the effect on an Award of the disability, death, retirement
or other termination of employment of a Participant and the
extent to which, and the period during which, the
Participant's legal representative, guardian or Designated
Beneficiary may receive payment of an Award or exercise
rights thereunder.  The Board shall have complete
discretion, exercisable either at the time the Award is made
or at any time while the Award remains outstanding, to
accelerate the vesting of any Award or any part of any Award
remaining unvested upon the termination of employment of a
Participant or to extend the period of time for which an
Option is to remain exercisable following the termination of
employment of a Participant, provided, however, that in no
event shall such Option be exercisable after the specified
expiration date of such Option.

(g)  Change in Control.  In order to preserve a
Participant's rights under an Award in the event of a Change
in Control of the Corporation, the Board in its discretion
may, at the time an Award is made or at any time thereafter,
take one or more of the following actions: (i) provide for
the acceleration of any time period relating to the exercise
or realization of the Award, (ii) provide for the purchase
of the Award for an amount of cash or other property that
could have been received upon the exercise or realization of
the Award had the Award been currently exercisable or
payable, (iii) adjust the terms of the Award in a manner
determined by the Board to reflect the Change in Control,
(iv) cause the Award to be assumed, or new rights
substituted therefor, by another entity, or (v) make such
other provision as the Board may consider equitable and in
the best interests of the Corporation, provided that, in the
case of an action taken with respect to an outstanding
Award, the Participant's consent to such action shall be
required unless the Board determines that the action, taking
into account any related action, would not materially and
adversely affect the Participant.  Unless otherwise provided
in any Award, for purposes hereof a "Change in Control" of
the Corporation shall mean: (i) the acquisition by any
individual, entity or group (within the meaning of Section
13(d)(3) or 14(d)(2) of the Securities Exchange Act of 1934,
as amended (the "Exchange Act")) of beneficial ownership
(within the meaning of Rule 13d-3 promulgated under the
Exchange Act) of 20% or more of the then outstanding shares
of common stock of the Corporation (the "Outstanding
Corporation Common Stock"); provided, however, that any
acquisition by the Corporation or its subsidiaries, or any
employee benefit plan (or related trust) of the Corporation
or its subsidiaries of 20% or more of Outstanding
Corporation Common Stock shall not constitute a Change in
Control; and provided, further, that any acquisition by a
corporation with respect to which, following such
acquisition, more than 50% of the then outstanding shares of
common stock of such corporation, is then beneficially
owned, directly or indirectly, by all or substantially all
of the individuals and entities who were the beneficial
owners of the Outstanding Corporation Common Stock
immediately prior to such acquisition in substantially the
same proportion as their ownership, immediately prior to
such acquisition, of the Outstanding Corporation Common
Stock, shall not constitute a Change in Control; or (ii) any
transaction which results in the Continuing Directors (as
defined in the Certificate of Incorporation of the
Corporation) constituting less than a majority of the Board;
or (iii) consummation by the Corporation of (i) a
reorganization, merger or consolidation, in each case, with
respect to which all or substantially all of the individuals
and entities who were the beneficial owners of the
Outstanding Corporation Common Stock immediately prior to
such reorganization, merger or consolidation do not,
following such reorganization, merger or consolidation,
beneficially own, directly or indirectly, more than 50% of
the then outstanding shares of common stock of the
corporation resulting from such a reorganization, merger or
consolidation or (ii) the sale or other disposition of all
or substantially all of the assets of the Corporation,
excluding a sale or other disposition of assets to a
subsidiary of the Corporation.

(h)  Withholding.  The Corporation shall have the power and
the right to deduct or withhold, or require a Participant to
remit to the Corporation an amount sufficient to satisfy
federal, state and local taxes (including the Participant's
FICA obligation) required to be withheld with respect to an
Award or any dividends or other distributions payable with
respect thereto. In the Board's discretion, such tax
obligations may be paid in whole or in part in shares of
Common Stock, including shares retained from the Award
creating the tax obligation, valued at their Fair Market
Value on the date of delivery, provided, however, that the
optionholder must have owned at least such number of shares
for at least six months.  The Corporation and its Affiliates
may, to the extent permitted by law, deduct any such tax
obligations from any payment of any kind otherwise due to
the Participant.

(i)  Amendment of Award.  The Board may amend, modify or
terminate any outstanding Award, including substituting
therefor another Award of the same or a different type,
changing the date of exercise or realization and converting
an Incentive Stock Option to a Nonqualified Stock Option,
provided that the Participant's consent to such action shall
be required unless the Board determines that the action,
taking into account any related action, would not materially
and adversely affect the Participant.

(j)  Awards Not Transferable.  Except as otherwise provided
by the Board, Awards under the Plan are not transferable
other than as designated by the participant by will or by
the laws of descent and distribution.

Section 9.  Miscellaneous

(a)  No Right To Employment.  No person shall have any claim
  or right to be granted an Award, and the grant of an Award
  shall not be construed as giving a Participant the right to
  continued employment.  The Corporation expressly  reserves
  the right at any time to dismiss a Participant free from any
  liability  or  claim under the Plan, except  as  expressly
  provided in the applicable Award.

(b)  No Rights As Shareholder.  Subject to the provisions of
  the   applicable  Award,  no  Participant  or   Designated
  Beneficiary  shall have any rights as a  shareholder  with
  respect  to  any shares of Common Stock to be  distributed
  under the Plan until he or she becomes the holder thereof.
  A  Participant  to whom Common Stock is awarded  shall  be
  considered the holder of the Stock at the time of the Award
  except as otherwise provided in the applicable Award.

(c)   Effective  Date.   Subject  to  the  approval  of  the
  shareholders of the Corporation, the Plan shall be effective
  on  March 9, 1999 (the "Effective Date").  Prior  to  such
  approval,  Awards  may be made under  the  Plan  expressly
  subject to such approval. Awards under the Plan may be made
  for a period of ten years commencing on the Effective Date.
  The period during which an Award may be exercise may extend
  beyond that time as provided herein.

(d)   Amendment  of Plan.  The Board may amend,  suspend  or
  terminate  the Plan or any portion thereof  at  any  time,
  provided that no amendment shall be made without shareholder
  approval if such approval is necessary to comply with  any
  applicable requirement of the laws of the jurisdiction  of
  incorporation  of  the  Corporation,  any  applicable  tax
  requirement,  any  applicable rules or regulation  of  the
  Securities and Exchange Commission, including Rule 16(b)-3
  (or  any  successor rule thereunder),  or  the  rules  and
  regulations of The Nasdaq Stock Market or any other exchange
  or stock market over which the Corporation's securities are
  listed.

(e)   Governing  Law.  The provisions of the Plan  shall  be
  governed by and interpreted in accordance with the laws of
  the jurisdiction of incorporation of the Corporation.

Indemnity.  Neither the Board nor the Committee, nor any
members of either, nor any employees of the Corporation or
any parent, subsidiary, or other affiliate, shall be liable
for any act, omission, interpretation, construction or
determination made in good faith in connection with their
responsibilities with respect to this Plan, and the
Corporation hereby agrees to indemnify the members of the
Board, the members of the Committee, and the employees of
the Corporation and its parent or subsidiaries in respect of
any claim, loss, damage, or expense (including reasonable
counsel fees) arising from any such act, omission,
interpretation, construction or determination to the full
extent permitted by law.