The number of computed tomographic (CT) studies performed is increasing rapidly.
Because CT scans involve much higher doses of radiation than plain films, we are seeing a
marked increase in radiation exposure in the general population. Epidemiologic studies
indicate that the radiation dose from even two or three CT scans results in a detectable
increase in the risk of cancer, especially in children. This article summarizes the facts about
this form of radiation exposure and the implications for public health.