EXHIBIT 2.3 APOLLO INVESTMENT FUND III, L.P. c/o Apollo Advisors II, L.P. 1301 Avenue of the Americas New York, NY 10036 July 22, 1997 Alliance Imaging, Inc. 1065 PacifiCenter Drive, Suite 200 Anaheim, CA 92806 RE: AGREEMENT AND PLAN OF MERGER...Agreement and Plan of Merger • September 29th, 1997 • Alliance Imaging Inc /De/ • Services-medical laboratories • New York
