[1]高楠,王宇翔,刘志鹏,等.ProBeam质子治疗系统辐射屏蔽的防护效果[J].中国医学物理学杂志,2022,39(11):1349-1354.[doi:DOI:10.3969/j.issn.1005-202X.2022.11.006]
　GAO Nan,WANG Yuxiang,LIU Zhipeng,et al.Effectiveness of radiation shielding design for ProBeam proton therapy system[J].Chinese Journal of Medical Physics,2022,39(11):1349-1354.[doi:DOI:10.3969/j.issn.1005-202X.2022.11.006]
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ProBeam质子治疗系统辐射屏蔽的防护效果()
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《中国医学物理学杂志》[ISSN:1005-202X/CN:44-1351/R]

卷:
39卷
期数:
2022年第11期
页码:
1349-1354
栏目:
医学放射物理
出版日期:
2022-11-25

文章信息/Info

Title:
Effectiveness of radiation shielding design for ProBeam proton therapy system
文章编号:
1005-202X（2022）11-1349-06
作者:
高楠1; 王宇翔2; 刘志鹏2; 王远远2
1.中国科学技术大学附属第一医院离子医学中心（合肥离子医学中心）医学工程装备部， 安徽 合肥 230088； 2.中国科学技术大学附属第一医院离子医学中心（合肥离子医学中心）临床物理技术科， 安徽 合肥 230088
Author(s):
GAO Nan1;  WANG Yuxiang2;  LIU Zhipeng2;  WANG Yuanyuan2
1. Department of Medical Engineering, Ion Medical Center of the First Affiliated Hospital of University of Science and Technology of China (Hefei Ion Medical Center), Hefei 230088, China 2. Department of Clinical Physics and Technique, Ion Medical Center of the First Affiliated Hospital of University of Science and Technology of China (Hefei Ion Medical Center), Hefei 230088, China
关键词:
辐射屏蔽; 质子治疗系统; 辐射场; 环境影响
Keywords:
Keywords: radiation shielding proton therapy system radiation field environment impact
分类号:
R144.1；R318
DOI:
DOI:10.3969/j.issn.1005-202X.2022.11.006
文献标志码:
A
摘要:
目的：对医用质子治疗系统的辐射屏蔽效果进行实际测量和分析，以期为相关单位和部门进行质子放射工作场所辐射防护检测或相关研究提供参考。方法：以瓦里安ProBeam质子治疗系统为研究对象，根据回旋加速器、治疗机房的布局和质子束流的传输路径和方向，进行了各关注点位的布局设计。另外，测量方案中对各关注点位设计了最不利工况，使用X/γ探测器和中子探测器对各关注点位在对应工况下的X/γ剂量率和中子剂量率进行实测，并对测量结果进行理论分析。结果：各关注点位实测到的X/γ和中子剂量率均低于辐射防护标准要求的限值，且大部分点位的实测数据接近环境本底水平。其中，位于降能器上方电源室的U1点位的剂量率测量值最高，为2.28 μSv/h，同样低于防护标准要求的适用于该点位的剂量率限值10 μSv/h。结论：本研究涉及的质子治疗系统的屏蔽设计满足辐射防护的要求，所有关注点位在最不利条件下的剂量率实测结果均满足防护标准的剂量率限值要求。对于质子治疗系统屏蔽防护效果研究的点位布局及测量工况设计和实测数据方面，本工作可以为同类研究提供参考依据。 【关键词】辐射屏蔽；质子治疗系统；辐射场；环境影响
Abstract:
Abstract: Objective To measure and analyze the effectiveness of radiation shielding design for medical proton therapy system for providing a reference for relevant institutes and departments to carry out radiation protection measurements in proton radiation workplace and related researches. Methods Taking Varian ProBeam proton therapy system as the research object, a number of concerned measurement positions were selected according to the layouts of the cyclotron, treatment rooms and proton beam transmission path. Furthermore, the worst-case scenarios were chosen at each concerned position during the measurements. X/γ detectors and neutron detectors were used to measure the ambient radiation levels (X/γ dose rate and neutron dose rate) at each concerned position in different case scenarios of the proton system, and a theoretical analysis was carried out on the measurement results. Results The dose rates of X/γ and neutron at each concerned position were all below the limit of radiation protection standard, and most of the measurements were close to the background level. Particularly, the maximal dose rate which measured at the U1 position in the power room upon the energy degrader was 2.28 μSv/h, lower than the dose rate limit (10 μSv/h) applicable to this point that was required by the radiation protection standard. Conclusion The radiation shielding design for proton therapy system meets the requirements of radiation protection standard. All the measured dose rates at concerned positions in worst-case scenarios are within the tolerance of radiation protection standard. The idea of concerned position selection, setting up the worst-case scenarios and onsite radiation measurement in this research provides a reference for similar researches.

相似文献/References:

[1]闫卓,徐榭,陈志.基于蒙特卡洛方法和数字体模的质子治疗设施屏蔽优化设计[J].中国医学物理学杂志,2020,37(12):1482.[doi:DOI:10.3969/j.issn.1005-202X.2020.12.002]
　YAN Zhuo,X. George XU,CHEN Zhi,et al.Shielding optimization of proton therapy facilities based on Monte Carlo simulations and voxelized human phantoms[J].Chinese Journal of Medical Physics,2020,37(11):1482.[doi:DOI:10.3969/j.issn.1005-202X.2020.12.002]
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备注/Memo

备注/Memo:
【收稿日期】2022-06-09 【作者简介】高楠，工程师，研究方向：辐射防护，E-mail: gaonan@himc.org.cn 【通信作者】王远远，硕士，工程师，研究方向：医学物理，E-mail: wangyuanyuan@himc.org.cn
更新日期/Last Update: 2022-11-25