Cesium Turnover in Man following Single Administration of ^<132>Cs 1. Whole Body Retention and Excretion Pattern

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Four Japanese subjects (three males and a female) were measured for their whole body retention and excretion rate following oral administration of ^<132>Cs. For the retention and distribution studies, awbole body counter-scanner that was built at this institute was used. In this first report, short- and long-term biological half-lives, daily urinary and fecal excretion rates and the calibration constants for ^<137>Cs in the body are reported. Although the excretion patterns obtained were quite similar to those already reported by others, the mean long-term biological halflife for the three male subjects, (73 days ranging from 65.5 to 82.0 days) was rather smaller than other values. The short-term half-life is caused by a large excretion rate in urine in a few days following the administration.
日本放射線影響学会の論文