Cesium Turnover in Man following Single Administration of <SUP>132</SUP>CS 1. Whole Body Retention and Excretion Pattern

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  • Cesium Turnover in Man following Single Administration of 132CS 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 132Cs. For the retention and distribution studies, awhole 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 137Cs 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.

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