Alliance Imaging Announces Participation at 23rd Annual JPMorgan Healthcare Conference.

ANAHEIM, Calif. -- Alliance Imaging, Inc. (NYSE:AIQ), a leading national provider of diagnostic imaging services, today announced that Paul S. Viviano, chairman of the board and chief executive officer and Howard K. Aihara, vice president and corporate controller, are scheduled to present at the 23rd Annual JPMorgan Healthcare Conference on Tuesday, January 11, 2005, at 11:00 a.m. Eastern time (8:00 a.m. Pacific time).

Interested parties are invited to listen to the presentation, which will be available live over the Internet at http://equityconferences.jpmorgan.com. A replay of this webcast will be available until April 5, 2005, using the same URL link noted above.

For more information about Alliance Imaging, interested parties are encouraged to review the company's recent filings with the Securities and Exchange Commission. These filings, which are available at www.allianceimaging.com, include discussions of risk factors, historical results of operations, and the company's financial position. For a complete list of risks and uncertainties, please refer to the Risk Factor section of the Company's Form 10-K for the year ended December 31, 2003 filed with the Securities and Exchange Commission.

Alliance Imaging is a leading national provider of diagnostic imaging services. Alliance provides imaging services primarily to hospitals and other healthcare providers on a shared and full-time service basis, in addition to operating a growing number of fixed-site imaging centers. The Company had 481 diagnostic imaging systems, including 362 MRI systems and 53 PET or PET/CT systems, and over 1,000 clients in 43 states at September 30, 2004.