Abstract

The benefits and radiation risks are estimated from a mass chest x-ray survey in present-day Japan. About 4,000 × 104 chest fluorographies were carried out in 1968: 44,447 cases of active pulmonary tuberculosis and a probable total of 758 curable cases of lung cancer were detected. However, 1.82 leukemias per year or about 46 leukemias and 7 incurable chest cancers in the forthcoming 25-year period are expected among this population. Also, 150 genetic deaths are estimated until the 10th generation.

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