Dr. Charles Mistretta received the Gray Medal on July 31, 2017 at the 59th Annual Meeting and Exhibition of the American Association of Physicists in Medicine (AAPM) in Denver, Colorado.  Dr. Mistretta’s talk was entitled “Historical Recollections of Developments in Angiography 1971-2017. The Gray Medal was presented to Dr. Mistretta by ICRU Vice Chairman Dr. Paul DeLuca.