全身计数器测量头骨^(241)Am评估骨镅滞留量方法

Assessment of americium retention in bone by measuring^(241)Am in the skull with a whole-body counter

目的通过测量人体头骨中^(241)Am的滞留量以评估工作人员全身骨骼中^(241)Am的滞留量。方法全身计数器高纯锗探测器测量头骨中^(241)Am的59.5 keV全能峰计数,数字头骨体模结合探测器几何模型对测量进行效率刻度,最终计算该名工作人员头骨中^(241)Am的滞留量。结果利用头骨占全身骨骼干重的比例作为由头骨^(241)Am的测量活度推算全身骨骼中^(241)A滞留量的系数,来推算全身骨骼中^(241)Am滞留量。结论测量头骨中^(241)Am的滞留量结合头骨占全身骨骼干重的比例,最终计算出该名工作人员全身骨骼内^(241)Am滞留量约为806 Bq。

Objective To assess the retention of^(241)Am in the whole-body bone of worker by measuring the retention of^(241)Am in the skull.Methods A whole-body counter with high-purity germanium detector was used to measure the 59.5 keV full-energy peak count of^(241)Am in the skull.The efficiency of the measurement was calibrated by the digital skull phantom combined with the geometric model of the detector.The retention of^(241)Am in the worker’s skull was calculated.Results The proportion of skull dry weight relative to the whole-body bone dry weight was used as the coefficient to calculate the^(241)Am deposition in the whole-body bone from the measured activity of skull^(241)Am.Conclusion With the retention of^(241)Am in the skull and the proportion of skull dry weight,the retention of^(241)Am in the whole-body bone of the worker was calculated to be about 806 Bq.