Exhibit 1


              AGREEMENT REGARDING THE JOINT FILING OF SCHEDULE 13D

                  In accordance with Rule 13d-1(k)(1)(iii) of the Securities
Exchange Act of 1934, as amended, the undersigned agree to the joint filing on
behalf of each of them of an Amended and Restated Statement on Schedule 13D
(including any and all amendments thereto) with respect to the Common Stock of
InSight Health Services Corp., and further agree that this Agreement shall be
included as an Exhibit to such joint filing.

                  The undersigned further agree that each party hereto is
responsible for timely filing of such Amended and Restated Statement on Schedule
13D and any amendments thereto, and for the completeness and accuracy of the
information concerning such party contained therein; provided that no party is
responsible for the completeness or accuracy of the information concerning the
other parties, unless such party knows or has reason to believe that such
information is inaccurate.

                  This Agreement may be executed in one or more counterparts,
each of which shall be deemed to be an original instrument, but all of such
counterparts together shall constitute but one agreement.

                  In evidence thereof the undersigned, being duly authorized,
hereby execute this Agreement this 10th. day of December, 2001.

                      J.W. CHILDS EQUITY PARTNERS II, L.P.
                      By: J.W. Childs Advisors II, L.P., its general partner
                      By: J.W. Childs Associates, L.P., its general partner
                      By: J.W. Childs Associates, Inc., its general partner


                      By: /s/ Edward D. Yun
                          ----------------------------------------
                      Name:   Edward D. Yun
                      Title:  Vice President

                      JWC-INSIGHT CO-INVEST LLC
                      By: J.W. Childs Associates, Inc., its managing member


                      By: /s/ Edward D. Yun
                          ----------------------------------------
                      Name:   Edward D. Yun
                      Title:  Vice President

                      HALIFAX CAPITAL PARTNERS, L.P.
                      By: Halifax Genpar, L.P.
                      By: The Halifax Group, L.L.C.

                      By: /s/ David W. Dupree
                          ----------------------------------------
                      Name:   David W. Dupree
                      Title:  Vice President

                      INSIGHT HEALTH SERVICES HOLDINGS CORP.

                      By: /s/ Edward D. Yun
                          ----------------------------------------
                      Name:   Edward D. Yun
                      Title:  President