National CT use and radiation exposure: United States 1983.
Data from two sources provide an estimate that in 1983, 5-5.5 million computed tomographic (CT) procedures were performed in the U.S. Of those, 63% were head scans, 27% body, and 10% spine. Ten percent or fewer were high-resolution studies, primarily spine CT. The surface dose varies widely but ranges between 1 and 7 rad (10-70 mGy) for most examinations. It is estimated that CT scanning contributes 7%-8% of the adult active bone marrow dose that is received from diagnostic radiology.
D000368:Aged; D001853:Bone Marrow / Q000528:radiation effects; D004735:Energy Transfer; D006257:Head / Q000000981:diagnostic imaging; D006801:Humans; D008875:Middle Aged; D011829:Radiation Dosage; D013902:Radiography, Thoracic / Q000379:methods; D013131:Spine / Q000000981:diagnostic imaging; D014057:Tomography, X-Ray Computed / Q000295:instrumentation / Q000592:standards / Q000706:statistics & numerical data*; D014481:United States