NCRP No.151报告在评价MV级医用电子直线加速器机房周围环境辐射水平中的应用

目的 依照NCRP No.151报告给出的MV级医用电子直线加速器机房屏蔽设计的估算模式,导出医用电子直线加速器机房周围环境辐射水平的估算模式。方法 在NCRP No.151报告《MV级X和γ射线放疗设备的屏蔽设计和评价》给出的MV级医用电子直线加速器机房屏蔽设计估算模式的基础上,以等中心点剂量率替代周工作负荷,并舍弃居留因子和使用因子,再根据机房周围不同区域屏蔽材料的厚度进行逆向推导,最终导出了医用电子直线加速器机房周围环境辐射水平的估算模式。结果 为医用电子直线加速器机房周围环境辐射水平的估算提供了一套系统化模式。结论 该估算模式对医用电子直线加速器机房周围环境辐射水平的估算具有一定的实用价值。

Application of NCRP REPORT No.151 for Evaluating the Radiation Level at the Ambience of Megavoltage Medical Electron Linear Accelerator Treatment Room

Objective The estimation model,on radiation level at the ambience of medical electron linear accelerator treatment rooms,is derived on the basis of NCRP REPORT No.151,which presents the calculation model of shielding design about barrier thicknesses of megavoltage medical electron linear accelerator treatment rooms.Methods The estimation model comes from NCRP REPORT No.151-Structural Shielding Design and Evaluation for Megavoltage X-and Gamma-Ray Radiotherapy Facilities,which presents the calculation model ...