首页|基于美国医学物理学家协会TG119报告的TaiChi加速器质量控制体系建立研究

基于美国医学物理学家协会TG119报告的TaiChi加速器质量控制体系建立研究

Study on the establishment of quality control system of TaiChi accelerator on the basis of AAPM TG119 reporter

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原文链接
  • 国家科技期刊平台
  • NETL
  • NSTL
  • 万方数据
目的:依据美国医学物理学家协会(AAPM)TG119号报告测试方法和项目对TaiChi加速器在RayStation治疗计划系统(简称RayStation系统)中的建模数据模型进行测试评估.方法:在治疗计划系统中按AAPM TG119号报告要求设计模拟多靶区、前列腺靶区、头颈靶区、容易型C形靶区计划和困难型C形靶区计划等不同临床情况测试病例的调强放射治疗(IMRT)和容积旋转调强放射治疗(VMAT)计划,测量两种计划中点剂量和面积量偏差,并将测试结果与AAPM TG119报告中推荐的标准进行对比分析.使用IBA CC13电离室和ArcCHECK矩阵电离室分别对点剂量和面剂量进行验证,评估标准为3%/3 mm的γ通过率.采用置信度评判测量剂量与计算剂量的一致性.结果:测试病例计划剂量目标、点剂量偏差及面剂量分布准确性均满足报告要求:测试病例IMRT和VMAT计划的靶区高剂量点平均剂量偏差分别为(0.39±1.02)%和(1.27±0.64)%,置信度分别为2.39%和2.52%.IMRT和VMAT计划的危及器官(OAR)低剂量点平均剂量偏差分别为(0.53±1.73)%和(0.88±1.11)%,置信度分别为3.92%和3.06%.IMRT和VMAT计划3%/3 mm标准下的平均γ通过率分别为(99.52±0.366)%和(99.86±0.136)%,置信度分别为1.196%和0.406%.结论:TaiChi加速器性能和Raystation系统6 MV FFF模型拟合精度满足AAPM TG119号报告标准,依据此测试结果建立后续设备和患者质控的标准,并为后续加速器性能的改进提供了参考.
Objective:The purpose of this study is to test and assess the model of modeling data of TaiChi accelerator in the Raystation Treatment Planning System(RayStation system)according to the test method and item of TG119 report of American Association Physicians Medicine(AAPM).Methods:The intensity-modulated radiation therapy(IMRT)and volumetric-modulated arc therapy(VMAT)plans of the test cases of different clinical situations,which included the simulated multi target region,prostate target region,head and neck target region,easy type C-shape target region plan and difficult type C-shape target region plan,were designed according to the AAPM TG119 report in the treatment planning system.The deviations of the doses of point and area of the two kinds of plans were measured,and the measured results were compared and analyzed with the recommended standards of AAPM TG119 report.The IBA CC13 ionization chamber and the ArcCHECK matrix ionization chamber were used respectively to verify the point dose and area dose,and the assessment standard was γ passing rate under 3%3mm.The confidence interval was adopted to judge the consistency between the measured dose and the calculated dose.Results:The accuracies of plan dose target,point dose deviation and area dose distribution of tested cases could meet the requirement of the TGl19 report.The deviations of mean doses for the high-dose points of IMRT plan and VMAT plan of tested cases were respectively(0.39±1.02)%and(1.27±0.64)%,and the confidence intervals of them were respectively 2.39%and 2.52%.The average dose deviations of low doses of organ at risk(OAR)of IMRT plan and VMAT plan were respectively(0.53±1.73)%and(0.88±1.11)%,and the confidence intervals were respectively 3.92%and 3.06%.The average γ passing rate under 3%/3mm of IMRT plan and VMAT plan were respectively(99.52±0.366)%and(99.86±0.136)%,and the confidence intervals of them were respectively 1.196%and 0.406%.Conclusion:The TaiChi accelerator performance and the accuracy of Raystation system 6MV FFF model fitting can meet the standard of TG119 report,and the subsequent standards of the quality control of equipment and patients were established according to these tested results,which would provide reference for the improvement of the performance of subsequent accelerator.

TG119 report of American Association of Physicists in Medicine(AAPM)AcceleratorIntensity-modulated radiation therapy(IMRT)Volumetric-modulated arc therapy(VMAT)

庞廷田、王涛、雷琪琪、杨波、汪之群、张杰、陈胤竹、李世豪、昝鹏、邱杰

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中国医学科学院 北京协和医学院 北京协和医院放疗科 北京 100730

西安大医集团股份有限公司 西安 710018

美国医学物理家协会(AAPM)TG119报告 加速器 调强放射治疗(IMRT) 容积旋转调强放射治疗(VMAT)

国家重点研发计划中央高水平医院临床科研业务费项目

2022YFC24046062022-PUMCH-B-116

2024

10.3969/j.issn.1672-8270.2024.06.001

中国医学装备
中国医学装备协会

中国医学装备

CSTPCD
影响因子：0.882
ISSN：1672-8270
年,卷(期)：2024.21(6)
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