Exhibit 3.4

                              AMENDED AND RESTATED

                                     BY-LAWS

                                       OF

                     INSIGHT HEALTH SERVICES HOLDINGS CORP.


1.       MEETINGS OF STOCKHOLDERS.

         1.1 Annual Meeting. The annual meeting of stockholders shall be held on
the 15th of May in each year, or as soon thereafter as practicable, and shall be
held at a place and time determined by the board of directors (the "Board").

         1.2 Special Meetings. Special meetings of the stockholders may be
called by resolution of the Board or by the chairman of the Board or the
president and shall be called by the president or secretary upon the written
request (stating the purpose or purposes of the meeting) of a majority of the
directors then in office or of the holders of 25 % of the outstanding shares
entitled to vote. Only business related to the purposes set forth in the notice
of the meeting may be transacted at a special meeting.

         1.3 Place and Time of Meetings. Meetings of the stockholders may be
held in or outside Delaware at the place and time specified by the Board or the
directors or stockholders requesting the meeting.

         1.4 Notice of Meetings; Waiver of Notice. Written notice of each
meeting of stockholders shall be given to each stockholder entitled to vote at
the meeting, except that (a) it shall not be necessary to give notice to any
stockholder who submits a signed waiver of notice before or after the meeting,
and (b) no notice of an adjourned meeting need be given except when required
under Section 1.5 of these by-laws or by law. Each notice of a meeting shall be
given, personally or by mail, not less than 5 nor more than 60 days before the
meeting and shall state the time and place of the meeting, and unless it is the
annual meeting, shall state at whose direction or request the meeting is called
and the purposes for which it is called. If mailed, notice shall be considered
given when mailed to a stockholder at his address on the corporation's records.
The attendance of any stockholder at a meeting, without protesting at the
beginning of the meeting that the meeting is not lawfully called or convened,
shall constitute a waiver of notice by him.

         1.5 Quorum. At any meeting of stockholders, the presence in person or
by proxy of the holders of a majority of the shares entitled to vote shall
constitute a quorum for the transaction of any business. In the absence of a
quorum a majority in voting interest of those present or, if no stockholders are
present, any officer entitled to preside at or to act as secretary of the
meeting, may adjourn the meeting until a quorum is present. At any adjourned
meeting at which a quorum is present any action may be taken which might have
been taken at the meeting as originally called.

No notice of an adjourned meeting need be given if the time and place are
announced at the meeting at which the adjournment is taken except that, if
adjournment is for more than thirty days or if, after the adjournment, a new
record date is fixed for the meeting, notice of the adjourned meeting shall be
given pursuant to Section 1.4.

         1.6 Voting; Proxies. Each stockholder of record shall be entitled to
one vote for every share registered in his name. Corporate action to be taken by
stockholder vote, including the election of directors, shall be authorized by a
majority of the votes cast at a meeting of stockholders, except as otherwise
provided by law or by Section 1.8 of these by-laws. Directors shall be elected
in the manner provided in Section 2.1 of these by-laws. Voting need not be by
ballot unless requested by a stockholder at the meeting or ordered by the
chairman of the meeting; however, all elections of directors shall be by written
ballot, unless otherwise provided in the certificate of incorporation. Each
stockholder entitled to vote at any meeting of stockholders or to express
consent to or dissent from corporate action in writing without a meeting may
authorize another person to act for him by proxy. Every proxy must be signed by
the stockholder or his attorney-in-fact. No proxy shall be valid after three
years from its date unless it provides otherwise.

         1.7 List of Stockholders. Not less than 10 days prior to the date of
any meeting of stockholders, the secretary of the corporation shall prepare a
complete list of stockholders entitled to vote at the meeting, arranged in
alphabetical order and showing the address of each stockholder and the number of
shares registered in his name. For a period of not less than 10 days prior to
the meeting, the list shall be available during ordinary business hours for
inspection by any stockholder for any purpose germane to the meeting. During
this period, the list shall be kept either (a) at a place within the city where
the meeting is to be held, if that place shall have been specified in the notice
of the meeting, or (b) if not so specified, at the place where the meeting is to
be held. The list shall also be available for inspection by stockholders at the
time and place of the meeting.

         1.8 Action by Consent Without a Meeting. Any action required or
permitted to be taken at any meeting of stockholders may be taken without a
meeting, without prior notice and without a vote, if a consent in writing,
setting forth the action so taken, shall be signed by the holders of outstanding
stock having not less than the minimum number of votes that would be necessary
to authorize or take such action at a meeting at which all shares entitled to
vote thereon were present and voting. Prompt notice of the taking of any such
action shall be given to those stockholders who did not consent in writing.

2.       BOARD OF DIRECTORS.

         2.1 Number, Qualification, Election and Term of Directors. The business
of the corporation shall be managed by the Board, which shall consist of no less
than one director and no more than ten directors. The number of directors may be
changed by resolution of a majority of the entire Board or by the stockholders,
but no decrease may shorten the term of any incumbent director. Directors
shall be elected at each annual meeting of stockholders with a majority vote and
shall hold office until the next annual meeting of stockholders and until the
election and qualification of their


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respective successors, subject to the provisions of Section 2.10. As used in
these by-laws, the term "entire Board" means the total number of directors which
the corporation would have if there were no vacancies on the Board.

         2.2 Quorum and Manner of Acting. A majority of the entire Board
(including at least three directors designated by the JWC Holders (as defined by
the Amended and Restated Stockholders Agreement dated as of October 17, 2001 by
and among InSight Health Services Holdings Corp., J.W. Childs Equity Partners
II, L.P., JWC-InSight Co-Invest LLC, Halifax Capital Partners, L.P., David W.
Dupree and the other parties named therein)) shall constitute a quorum for the
transaction of business at any meeting, except as provided in Section 2.11 of
these by-laws. Actions of the Board shall be authorized by the vote of a
majority of the directors present at the time of the vote if there is a quorum
unless otherwise provided by law or these by-laws. In the absence of a quorum a
majority of the directors present may adjourn any meeting from time to time
until a quorum is present.

         2.3 Voting Rights. Each director on the Board shall have one vote on
each matter brought to a vote before the Board.

         2.4 Place of Meetings. Meetings of the Board may be held in or outside
Delaware.

         2.5 Annual and Regular Meetings. Annual meetings of the Board, for the
election of officers and consideration of other matters, shall be held either
(a) without notice immediately after the annual meeting of stockholders and at
the same place, or (b) as soon as practicable after the annual meeting of
stockholders, on notice as provided in Section 2.7 of these by-laws. Regular
meetings of the Board may be held without notice at such times and places as the
Board determines provided that any director who does not attend a regular
meeting shall be given prompt notice of any actions or resolutions approved by
the Board at such meeting. If the day fixed for a regular meeting is a legal
holiday, the meeting shall be held on the next business day.

         2.6 Special Meetings. Special meetings of the Board may be called by
the chairman of the board, the president or by a majority of the entire board.
Only business related to the purposes set forth in the notice of meeting or
raised by the Chairman of the Board may be transacted at a special meeting.

         2.7 Notice of Meetings; Waiver of Notice. Notice of the time and place
of each special meeting of the Board, and of each annual meeting not held
immediately after the annual meeting of stockholders and at the same place,
shall be given to each director by methods reasonably calculated to give each
director notice of such meeting at least one day before the meeting. Notice of a
special meeting shall also state the purpose or purposes for which the meeting
is called. Notice need not be given to any director who submits a signed waiver
of notice before or after the meeting or who attends the meeting without
protesting at the beginning of the meeting the transaction of any business
because the meeting was not lawfully called or convened. Notice of any adjourned
meeting need not be given, other than by announcement at the meeting at which
the adjournment is taken.


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         2.8 Board or Committee Action Without a Meeting. Any action required or
permitted to be taken by the Board or by any committee of the Board may be taken
without a meeting if all of the members of the Board or of the committee consent
in writing to the adoption of a resolution authorizing the action. The
resolution and the written consents by the members of the Board or the committee
shall be filed with the minutes of the proceeding of the Board or of the
committee.

         2.9 Participation in Board or Committee Meetings by Conference
Telephone. Any or all members of the Board or of any committee of the Board may
participate in a meeting of the Board or of the committee by means of a
conference telephone or similar communications equipment allowing all persons
participating in the meeting to hear each other at the same time. Participation
by such means shall constitute presence in person at the meeting.

         2.10 Resignation and Removal of Directors. Any director may resign at
any time by delivering his resignation in writing to the president or secretary
of the corporation, to take effect at the time specified in the resignation; the
acceptance of a resignation, unless required by its terms, shall not be
necessary to make it effective. Any or all of the directors may be removed at
any time, either with or without cause, by vote of the stockholders.

         2.11 Vacancies. Any vacancy in the Board, including one created by an
increase in the number of directors, may be filled for the unexpired term by a
majority vote of the remaining directors, though less than a quorum.

         2.12 Compensation. Directors shall receive such compensation as the
Board determines, together with reimbursement of their reasonable expenses in
connection with the performance of their duties. A director may also be paid for
serving the corporation, its affiliates or subsidiaries in other capacities.

3.       COMMITTEES.

         3.1 Executive Committee. The Board, by resolution adopted by a majority
of the entire Board, may designate an Executive Committee of one or more
directors which shall have all the powers and authority of the Board, except as
otherwise provided in the resolution, section 141(c) of the Delaware General
Corporation Law, or any other applicable law. The members of the Executive
Committee shall serve at the pleasure of the Board. All action of the Executive
Committee shall be reported to the Board at its next meeting.

         3.2 Other Committees. The Board, by resolution adopted by a majority of
the entire Board, may designate other committees of directors of one or more
directors, which shall serve at the Board's pleasure and have such powers and
duties as the Board determines.

         3.3 Rules Applicable to Committees. The Board may designate one or more
directors as alternate members of any committee, who may replace any absent or
disqualified member at any meeting of the committee. In the absence or
disqualification of any member of a committee, the


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member or members present at a meeting of the committee and not disqualified,
whether or not a quorum, may unanimously appoint another director to act at the
meeting in place of the absent or disqualified member. All action of a committee
shall be reported to the Board at its next meeting. Each committee shall adopt
rules of procedure and shall meet as provided by those rules or by resolutions
of the Board.

4.       OFFICERS.

         4.1 Number; Security. The executive officers of the corporation shall
be the chairman of the board, the president, one or more vice presidents
(including an executive vice president, if the Board so determines), a secretary
and a treasurer. Any two or more offices may be held by the same person, except
the offices of president and secretary. The Board may require any officer, agent
or employee to give security for the faithful performance of his duties.

         4.2 Election; Term of Office. The executive officers of the corporation
shall be elected annually by the Board, and each such officer shall hold office
until the next annual meeting of the Board and until the election of his
successor, subject to the provisions of Section 4.4.

         4.3 Subordinate Officers. The Board may appoint subordinate officers
(including assistant secretaries and assistant treasurers), agents or employees,
each of whom shall hold office for such period and have such powers and duties
as the Board determines. The Board may delegate to any executive officer or to
any committee the power to appoint and define the powers and duties of any
subordinate officers, agents or employees.

         4.4 Resignation and Removal of Officers. Any officer may resign at any
time by delivering his resignation in writing to the president or secretary of
the corporation, to take effect at the time specified in the resignation; the
acceptance of a resignation, unless required by its terms, shall not be
necessary to make it effective. Any officer appointed by the Board or appointed
by an executive officer or by a committee may be removed by the Board either
with or without cause, and in the case of an officer appointed by an executive
officer or by a committee, by the officer or committee who appointed him or by
the president.

         4.5 Vacancies. A vacancy in any office may be filled for the unexpired
term in the manner prescribed in Sections 4.2 and 4.3 of these by-laws for
election or appointment to the office.

         4.6 The President. The president shall be the chief executive officer
of the corporation and shall preside at all meetings of the Board and of the
stockholders. Subject to the control of the Board and the chairman of the board,
he shall have general supervision over the business of the corporation and shall
have such other powers and duties as presidents of corporations usually have or
as the Board assigns to him.

         4.7 Vice President. Each vice president shall have such powers and
duties as the Board or the president assigns to him.


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          4.8 The Treasurer. The treasurer shall be the chief financial officer
of the corporation and shall be in charge of the corporation's books and
accounts. Subject to the control of the Board, he shall have such other powers
and duties as the Board or the president assigns to him.

          4.9 The Secretary. The secretary shall be the secretary of, and keep
the minutes of, all meetings of the Board and of the stockholders, shall be
responsible for giving notice of all meetings of stockholders and of the Board,
and shall keep the seal and, when authorized by the Board, apply it to any
instrument requiring it. Subject to the control of the Board, he shall have such
powers and duties as the Board or the president assigns to him. In the absence
of the secretary from any meeting, the minutes shall be kept by the person
appointed for that purpose by the presiding officer.

         4.10 Salaries. The Board may fix the officers' salaries, if any, or it
may authorize the president to fix the salary of any other officer.


5.       SHARES.

         5.1 Certificates. The corporation's shares shall be represented by
certificates in the form approved by the Board. Each certificate shall be signed
by the president or a vice president and by the secretary or an assistant
secretary, or the treasurer or an assistant treasurer, and shall be sealed with
the corporation's seal or a facsimile of the seal. Any or all of the signatures
on the certificate may be a facsimile.

         5.2 Transfers. Shares shall be transferable only on the corporation's
books, upon surrender of the certificate for the shares, properly endorsed. The
Board may require satisfactory surety before issuing a new certificate to
replace a certificate claimed to have been lost or destroyed.

         5.3 Determination of Stockholders of Record. The Board may fix, in
advance, a date as the record date for the determination of stockholders
entitled to notice of or to vote at any meeting of the stockholders, or to
express consent to or dissent from any proposal without a meeting, or to receive
payment of any dividend or the allotment of any rights, or for the purpose of
any other action. The record date may not be more than 60 or less than 10 days
before the date of the meeting or more than 60 days before any other action.


6.       MISCELLANEOUS.

         6.1 Seal. The Board shall adopt a corporate seal, which shall be in the
form of a circle and shall bear the corporation's name and the year and state in
which it was incorporated.

         6.2 Fiscal Year. The Board may determine the corporation's fiscal year.
Until changed by the Board, the corporation's fiscal year shall end on June 30
of each calendar year.


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         6.3 Voting of Shares in Other Corporations. Shares in other
corporations which are held by the corporation may be represented and voted by
the president or a vice president of this corporation or by proxy or proxies
appointed by one of them. The Board may, however, appoint some other person to
vote the shares.

         6.4 Amendments. By-laws may be amended, repealed or adopted by the
stockholders or by a majority of the entire Board, but any by-law adopted by the
Board may be amended or repealed by the stockholders.










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