[1]杜文,马晓春,蔡宏懿,等. 两种布局后装机房辐射防护效果比较[J].中国医学物理学杂志,2018,35(5):532-536.[doi:DOI:10.3969/j.issn.1005-202X.2018.05.007]
　DU Wen,MA Xiaochun,CAI Hongyi,et al. Evaluation of radiation protection effect of two kinds of layouts of afterloading irradiation treatment room[J].Chinese Journal of Medical Physics,2018,35(5):532-536.[doi:DOI:10.3969/j.issn.1005-202X.2018.05.007]
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 两种布局后装机房辐射防护效果比较()
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《中国医学物理学杂志》[ISSN:1005-202X/CN:44-1351/R]

卷:
35卷
期数:
2018年第5期
页码:
532-536
栏目:
医学放射物理
出版日期:
2018-05-22

文章信息/Info

Title:
 Evaluation of radiation protection effect of two kinds of layouts of afterloading irradiation treatment room
文章编号:
1005-202X（2018）05-0532-05
作者:
 杜文; 马晓春; 蔡宏懿; 郭逸潇
 甘肃省人民医院放疗科， 甘肃 兰州 730000
Author(s):
 DU Wen;  MA Xiaochun;  CAI Hongyi;  GUO Yixiao
 Department of Radiotherapy, Gansu Provincial Hospital, Lanzhou 730000, China
关键词:
 ; 高剂量率后装放疗; 辐射防护; 周有效剂量; 距离
Keywords:
 ; high dose rate afterloading radiotherapy;  radiation protection;  weekly effective dose;  distance
分类号:
R146
DOI:
DOI:10.3969/j.issn.1005-202X.2018.05.007
文献标志码:
A
摘要:
 目的：从理论和实验两方面考察不同布局的后装机房各监测点（电缆孔、控制台、防护门、候诊位）的周有效剂量，为改善职业人员辐射防护提供数据支持。 方法：依据射线强度衰减所遵从的平方反比定律及指数规律，推导出各监测点的周有效剂量计算公式，依次计算放射源处于不同位置时各监测点的周有效剂量；用MEDCOM射线检测仪测量后装机放射源活度最大时，放射源处于不同位置各监测点的空气比释动能率，计算周工作负荷，即可得各监测点的周有效剂量。 结果：考虑距离因素后，各监测点（电缆孔、控制台、防护门、候诊位）的周有效剂量理论值分别由13.00、30.90、0.012 10、1.200 μSv降至2.08、2.29、0.004 75、0.564 μSv；实验值则分别由4.32、25.60、2.01、1.96 μSv降至2.16、2.96、1.55、1.41 μSv。 结论：考虑距离因素的后装机房布局能显著降低职业人员的周有效剂量。
Abstract:
 Objective To calculate the theoretical and experiment value of weekly effective dose at each monitoring site (cable hole, console, lead gate, waiting room) in different layouts of afterloading irradiation treatment room, and provide data support for improving the radiation protection for occupation personnel. Methods Based on the inverse square law and exponential law of the attenuation of X-ray intensity, the calculation formula of weekly effective dose at each monitoring site was derived, and the weekly effective dose at each monitoring site with the radioactive source at different locations was calculated. When the activity of the radioactive source which was placed at different locations reaches the maximum, MEDCOM Inspector Alert Handheld Surface Contamination Meter was used to measure the air kerma rate at each monitoring site. Finally, the weekly effective dose at each monitoring site was obtained by calculating weekly workload. Results After considering the distance, the theoretical value of weekly effective dose at each monitoring site (cable hole, console, lead gate, waiting room) was reduced from 13.00, 30.90, 0.012 10, 1.200 μSv to 2.08, 2.29, 0.004 75, 0.564 μSv, respectively. The experiment value was decreased from 4.32, 25.60, 2.01, 1.96 μSv to 2.16, 2.96, 1.55, 1.41 μSv, respectively. Conclusion The layout of afterloading irradiation treatment room with the consideration of the distance significantly reduces the weekly effective dose of the occupation personnel.

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备注/Memo

备注/Memo:
 【收稿日期】2017-11-13
【作者简介】杜文，硕士，物理师，研究方向：肿瘤放射物理学，E-mail: eluosidaodananna@163.com
【通信作者】蔡宏懿，博士，主任医师，研究方向：放射肿瘤学及放射物理学，E-mail:gschy333@163.com
更新日期/Last Update: 2018-05-22