[1]王志鹏,王坤,金孙均,等.水吸收剂量国际校准协议TRS-398V7使用指南[J].中国医学物理学杂志,2024,41(11):1327-1336.[doi:DOI:10.3969/j.issn.1005-202X.2024.11.002]
　WANG Zhipeng,WANG Kun,JIN Sunjun,et al.Users guide to international calibration protocol TRS-398V7 for absorbed dose to water[J].Chinese Journal of Medical Physics,2024,41(11):1327-1336.[doi:DOI:10.3969/j.issn.1005-202X.2024.11.002]
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水吸收剂量国际校准协议TRS-398V7使用指南()
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《中国医学物理学杂志》[ISSN:1005-202X/CN:44-1351/R]

卷:
41卷
期数:
2024年第11期
页码:
1327-1336
栏目:
医学放射物理
出版日期:
2024-11-26

文章信息/Info

Title:
Users guide to international calibration protocol TRS-398V7 for absorbed dose to water
文章编号:
1005-202X（2024）11-1327-10
作者:
王志鹏1; 王坤1; 金孙均1; 吴晗1; 2; 韩佳乐1; 2; 陆刚1; 2; 杨小元1
1.中国计量科学研究院， 北京 100029； 2.安徽理工大学机电工程学院， 安徽 淮南 232001
Author(s):
WANG Zhipeng1;  WANG Kun1;  JIN Sunjun1;  WU Han1;  2;  HAN Jiale1;  2;  LU Gang1;  2;  YANG Xiaoyuan1
1. National Institute of Metrology, Beijing 100029, China 2. School of Mechanical and Electrical Engineering, Anhui University of Science and Technology, Huainan 232001, China
关键词:
水吸收剂量; 电离室剂量计; 校准系数; 射线质转换因子; 不确定度; TRS-398
Keywords:
Keywords: absorbed dose to water ionization chamber dosimeter calibration coefficient beam quality conversion factor uncertainty TRS-398
分类号:
R318；R811.1
DOI:
DOI:10.3969/j.issn.1005-202X.2024.11.002
文献标志码:
A
摘要:
为满足外照射治疗束水吸收剂量校准需求，结合国际原子能机构（IAEA）2024年发布的TRS-398的第7版内容，给出优化的水吸收剂量校准流程及建议。在参考测量条件方面，给出多种外照射治疗束测量注意事项及电离室适用范围；在电离室测量方面，给出各个修正项的测量方法及射线质转换因子表；在校准不确定度方面，比较更新前后各个影响量的变化。结果表明：采用IBA FC65-G电离室校准高能光子束、高能电子束、质子束和轻离子束水吸收剂量值较早期版本的相对偏差依次为-0.4%、0.5%、-1.7%和-1.3%，相对标准不确定度依次为1.0%、1.1%、1.7%和2.6%。本指南结合国内放疗剂量校准水平和实践给出TRS-398优化的校准实践，以便高效准确地开展绝对剂量校准工作。
Abstract:
Abstract: To fulfill the calibration requirements for absorbed dose to water in external beam radiotherapy, the summary offers a streamlined calibration procedure and recommendations in accordance with TRS-398 (version 7) published by International Atomic Energy Agency in 2024. It addresses various considerations for reference measurement conditions in external beam radiotherapy and defines the appropriate scope for ionization chambers. In terms of ionization chamber measurements, it elaborates on the methods for measuring various correction factors and provides a table of beam quality conversion factors. The calibration uncertainty is examined by comparing the contributions of different factors before and after the update. The results demonstrate that using IBA FC65-G ionization chamber to calibrate high-energy photon beams, high-energy electron beams, proton beams and light ion beams results in relative deviations of -0.4%, 0.5%, -1.7% and -1.3% as compared with the earlier versions, with relative standard uncertainties of 1.0%, 1.1%, 1.7% and 2.6%, respectively. The guideline which is tailored to the national radiotherapy dose calibration standards and practices presents an optimized calibration approach for TRS-398, allowing clinicians to conduct absolute dose calibration more efficiently and accurately.

相似文献/References:

[1]刘 毅,王培臣,张 新,等.临床质子束水吸收剂量测量方法[J].中国医学物理学杂志,2014,31(06):5227.[doi:10.3969/j.issn.1005-202X.2014.06.001]
[2]王坤,李涛,杨小元,等.~(60)Co水吸收剂量的量值复现和国际比对验证[J].中国医学物理学杂志,2013,30(06):4476.[doi:10.3969/j.issn.1005-202X.2013.06.002]
[3]苌雪,王坤,张健,等. 高能光子水吸收剂量辐射质转换因子的实验测量[J].中国医学物理学杂志,2017,34(12):1196.[doi:DOI:10.3969/j.issn.1005-202X.2017.12.002]
　CHANG Xue,WANG Kun,ZHANG Jian,et al. Measurement of beam quality correction factor based on absorbed dose to water in high-energy photon beams[J].Chinese Journal of Medical Physics,2017,34(11):1196.[doi:DOI:10.3969/j.issn.1005-202X.2017.12.002]

备注/Memo

备注/Memo:
【收稿日期】2024-06-05 【基金项目】国家重点研发计划（2021YFF0603600）；质量技术基础能力建设专项（ANL2402） 【作者简介】王志鹏，博士，助理研究员，研究方向：水吸收剂量基标准相关研究，E-mail: wangzp@nim.ac.cn 【通信作者】王坤，博士，研究员，研究方向：辐射剂量学，E-mail: wangkun@nim.ac.cn
更新日期/Last Update: 2024-11-26