ELEKTA & IMPAC ANNOUNCE EXPIRATION OF HART-SCOTT-RODINO WAITING PERIOD

PRESS RELEASE Stockholm, Sweden and Mountain View, California – April 1, 2005

Elekta AB (publ) (SSE: EKTAb) and IMPAC Medical Systems, Inc. (NASDAQ: IMPC) today announced the expiration of the waiting period under the Hart-Scott-Rodino Antitrust Improvements Act of 1976 relating to the previously announced agreement for Elekta to acquire IMPAC by merger. The expiration of the Hart-Scott-Rodino waiting period satisfies one of the conditions for Elekta’s acquisition of IMPAC. Consummation of the merger remains subject to other customary closing conditions, including approval of the merger by IMPAC stockholders holding a majority of its outstanding shares at the stockholders’ meeting scheduled for April 4, 2005. If IMPAC’s stockholders approve the merger, the acquisition is expected to close promptly thereafter. ********