上海医用直线加速器机房辐射屏蔽调查

Investigation of Radiation Shielding in Shanghai Medical Linac Machine Room

摘要: 为了解上海市医院医用直线加速器机房辐射屏蔽性情况，选取了上海市3家拥有直线加速器的医院，根据加速器机房的实际情况，6MV无均整过滤器条件下，设计了辐射监测的布点，每个医院的医用加速器机房均布置了12个采样点，使用伽马辐射监测仪测定监测点数据，评价了测量结果。结果表明：三家医院医用直线加速器机房辐射剂量率测量结果远小于国标要求，直线加速器工作时不会对医务工作人员以及附近活动的患者产生危害。

Abstract: In order to understand the radiation shielding of medical linear accelerator rooms in Shanghai hospitals, three hospitals with linear accelerators in Shanghai were selected. According to the actual situation of the accelerator rooms, under the condition of 6MV without homogenizing filter, the distribution points of radiation monitoring were designed, and 12 sampling points were arranged in the medical accelerator rooms of each hospital. The data of the monitoring points were measured by gamma radiation monitor and the measurement results were evaluated. The results show that the radiation dose rate measurement results of the medical linear accelerator room in the three hospitals are far less than the requirements of the national standard, and the linear accelerator will not cause harm to medical staff and nearby patients.