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在RadCalc中的光束模型的剂量计算精度,用于1.5 T MR-Linac

Jiwon Sung¹, Yeonho Choi¹, Jun Won Kim¹

¹Department of Radiation Oncology, Gangnam Severance Hospital, Yonsei University College of Medicine, Seoul 06273, Republic of Korea.

|February 10, 2024

概括

RadCalc软件版本7.1.4准确地验证了在线适应性放射治疗的患者特定质量保证 (PSQA) 剂量,使用1.5 T磁共振线性加速器 (MR-linac). 这种独立的剂量计算工具对于适应性计划是可靠的.

科学领域:

医学物理医学物理
辐射瘤学辐射瘤学
辐射疗法质量保证辐射疗法质量保证

背景情况:

在线适应性放射治疗需要精确的剂量验证.
磁共振线性加速器 (MR-linacs) 由于磁场相互作用,对剂量计算提出了独特的挑战.
独立的软件对于患者特异性质量保证 (PSQA) 是至关重要的.

研究的目的:

为了评估RadCalc版本7.1.4的PSQA在1.5T MR-linac在线适应性规划.
为了评估RadCalc采用MR场特征的光束建模的准确性.
验证RadCalc作为适应性放射治疗剂量验证的可靠工具.

主要方法:

使用不同百分比剂量深度 (PDD) 数据来源建立了六个RadCalc光束模型.
通过对虚拟水幻象进行简单测试,评估剂量计算的准确性.
在575个适应性计划 (前列腺,肝脏,乳腺) 上进行了临床试验,将RadCalc与PSQA测量进行比较.

主要成果:

在虚拟幻影测试中,剂量计算的差异在 -0.5%至 -20.6%之间.
对适应性计划的临床试验显示,前列腺的百分比差异为-0.51%,肝脏的百分比差异为1.12%,乳腺的百分比差异为4.10%.
拉德卡尔克计算显示出与基于PSQA的测量结果相似的趋势.

结论:

RadCalc 7.1.4 版本成功地模拟了 1.5 T 磁场特性,用于自适应式规划.
已经验证了软件在1.5 T的剂量计算准确性.
RadCalc是MR-linac适应性放射治疗中PSQA的可靠和有效工具.

关键词:

这就是MR-linac.梁模型梁模型模型独立的剂量验证软件是独立的剂量验证软件.在线适应性规划在线适应性规划患者特异性的质量保证.

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