"Last year about 500 million imaging procedures were performed, according to the American College of Radiology-which averages out to about 1.7 scans per American. Booz Allen Hamilton estimates that in 2002 U.S. patients spent $75 billion on diagnostic imaging. ... Growth in medical scans has been far outpacing that of other medical services, rising 9% per capita between 1999 and 2002. ... It's terrible news for insurers and others concerned about higher medical costs. Even worse, many of these scans are being performed unnecessarily, and the upshot is higher healthcare costs for everyone."