Chromosomal estimation of radiation effects in man

The estimation of exposure dose based on chromosome aberrations was described. The results of estimation of exposure dose based on chromosome aberrations of peripheral lymphocytes on individuals exposed to 192Ir by accident, Bikini victims, and atomic bomb survivors were divided into subjects who had been observed from immediately after exposure and those who were observed after the lapse of many years, for comparison. In cases soon after exposure, results of very high precision were obtained as far as the low dose range. In cases after the lapse of many years, quantitative estimation to a considerable extent was also possible. (Serizawa, K.)