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基于EPID的剂量验证系统的研究,用于对患者进行特定的质量保证

Dohyeon Yoo¹, Hyunggun Lee^1,2, Sangmin Lee¹

¹Department of Radiation Oncology, Yonsei Cancer Center, Yonsei University, College of Medicine & Heavy Ion Therapy Research Institute, Yonsei University College of Medicine, Seoul, South Korea.

Journal of applied clinical medical physics

|August 21, 2025

概括

在Elekta Harmony Pro线性加速器上,RadCalc软件准确评估了高级辐射治疗的患者特异性质量保证 (PSQA) 剂量. 这种基于电子门户成像设备 (EPID) 的质量控制显示出可靠的性能,对于精确的癌症治疗至关重要.

科学领域:

医学物理
辐射瘤学
放射治疗质量保证

背景情况:

精确的患者特异性质量保证 (PSQA) 对于先进的放射治疗至关重要.
准确的剂量验证对于患者的安全性和治疗疗效至关重要.

研究的目的:

评估 RadCalc 软件基于电子门户成像设备 (EPID) 的 PSQA 功能.
评估Elekta Harmony Pro线性加速器 (LINACs) 的EPID图像的剂量重建的准确性.

主要方法:

在RadCalc中的Elekta Harmony Pro LINAC中对6MV和6MV平面化无光子束进行光束建模.
使用ArcCHECK幻影创建和测量体积调制弧线治疗 (VMAT) 计划.
使用EPID图像进行的RadCalc剂量计算与使用玛分析进行的治疗计划系统 (TPS) 计算进行了比较 (1%/ 1毫米,2%/ 2毫米,3%/ 3毫米).

主要成果:

对6-MV和6-MV FFF光束的高通过率为98.83%.
根据临床场所,VMAT计划显示6 - MV的合格率在82. 33%至99. 88%,而6 - MV的FFF的合格率在94. 07%至99. 87%.
RadCalc 实现了 98% (2%/2 mm) 的最小马传导率.

结论:

在Elekta Harmony Pro LINAC中,RadCalc软件对剂量评估具有很高的准确性.
基于EPID的PSQA功能表现出可靠的性能,即使有轻微的设置变化.
这证实了RadCalc作为高级放射治疗质量保证的可靠工具.

关键词:

一个IMRT 没有.一个VMAT 和的支持患者特定的质量保证

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