摘要
本文介绍利用计算机对全身计数器进行效率刻度的方法。文中计算了一个固定多探头全身计数器系统对不同大小体模的探测效率,分析了探测效率随体模长度和体厚因子变化的关系,并给出了对于137Cs源,通过修正参考人体模的探测效率而得到不同大小(身长145~185cm,体重45~87kg)体模探测效率的近似公式。
The detection efficiency of a fixed 4 detector whole body counter to a series of phantoms (with different dimension) were calculated by computer program. The variation of detection efficiency with the lenghth and body build index the phantom were analysed. For 137 Cs, as an example, an approximate method is presented to calculate the detection efficiency of phantoms with various dimensions (lenghth: 145~185 cm, weight: 45~87 kg) by adjusting the detection efficiency of reference men phantom.
出处
《辐射防护》
CAS
CSCD
北大核心
1998年第1期39-43,共5页
Radiation Protection
关键词
全身计数器
人体模型
探测效率
剂量监测
Whole body Counter, Phantom, Reference man, Detection Efficiency, Body build Index