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Fig. 5A. —Estimated age-dependent CT doses to various organs. Graphs show estimated age-dependent doses to various organs that contribute significantly to overall estimated risk for typical single CT examination of head (A) and of abdomen (B). Note different scales for the two graphs. As discussed in text, the same exposure techniques (milliampere-seconds) for all ages are assumed here. For both types of examinations, doses increase markedly with decreasing age.