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独立的二次剂量计算用于患者特异性质量保证:蒙特卡洛和定制光束建模的定量效益

Lone Hoffmann^1,2, Mai-Britt Linaa¹, Ditte Sloth Møller^1,2

¹Department of Oncology, Aarhus University Hospital, Aarhus, Denmark.

Journal of applied clinical medical physics

|September 24, 2025

概括

与分析算法相比,蒙特卡洛模拟为独立的二次剂量计算 (ISDC) 提供了更高的准确性. 定制的光束模型进一步提高了这种准确性,允许在放射治疗中采用更严格的质量保证标准.

科学领域:

医学物理医学物理
辐射瘤学辐射瘤学
计算剂量计计算剂量计.

背景情况:

独立的二次剂量计算 (ISDC) 对于辐射治疗中患者特定的质量保证至关重要.
蒙特卡洛 (MC) 系统正在成为ISDC传统分析算法更准确的替代方案.

研究的目的:

将MC系统的准确性和临床相关性与ISDC分析算法进行比较.
评估定制与通用光束模型对MC系统性能的影响.
以临床相关参数,行动水平和工作负载来量化好处.

主要方法:

分析了来自20个病例类的100个患者计划,最初计划使用Acuros XB.
使用Mobius3D (M3D) 和SciMoCa (SMC) 进行剂量计算,使用定制 (SMCcbm) 和通用 (SMCgen) 束模型.
在不同质量保证失败率下,确定了玛通量 (Gamma Pass Rate, GPR) 和平均目标剂量差 (Raddy Dose Difference, RADD) 的行动水平.

主要成果:

与M3D相比,MC系统,特别是自定义光束模型 (SMCcbm) 实现了显著更严格的操作水平 (例如,GPR<95%在2%/1mm, D >1%).
结合使用GPR和DD的标准,整体质量保证工作量减少到不到5%.
SMC中的故障与患者密度模型有关,而M3D的故障与异质性处理有关;SMC中的性能差异归因于通用光束模型.

结论:

蒙特卡洛模拟促进了更严格的接受标准,并可以识别处理计划系统 (TPS) 调试错误.
在将其应用于独立二次剂量计算 (ISDC) 之前,对通用光束模型的彻底验证至关重要.

关键词:

蒙特卡罗的蒙特卡罗是一个非常好的城市.行动级别行动级别的行动.剂量计算剂量计算方法独立的二次剂量计算.患者特定的质量保证.

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