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The increasing use of CT and its risks.

Emergency Department Use The use of CT has increased at an even higher rate in many EDs. One ED reported a patient increase of 13% between 2000 and 2005, with a disproportionately higher increase in the use of CT over the same period (see Table 1). The increase in CT use is driven by ever-increasing detection capabilities, as well as by the increasing availability of CT scanners. Additionally, many departments consider CT the first test for many conditions. Physicians might be replacing clinical judgment and time-consuming physical examinations with a “let’s do a quick CT” approach to emergency medicine. A trauma patient in the Yale University Medical Center ED might have his or her entire body scanned.