制定评估全球临床试验认证和PSQA系统的参考计划
Fre'Etta M D Brooks1, Mohammad Hussein2, Jessica Lye3,4,5
1University of Washington Medical Center, Seattle, Washington, USA.
Journal of applied clinical medical physics
|May 29, 2025
概括
开发了一个新的框架,以创建具有引入错误的验证放射治疗计划. 这允许测试和比较剂量计审计方法,有助于国际剂量计调整.
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:
- 剂量计审计对于确保放射治疗的准确性至关重要.
- 需要标准化的方法来比较不同审计协议的有效性.
- 现有的审计方法可能因其对治疗计划和交付错误的敏感性而有所不同.
研究的目的:
- 建立一个实用的框架,用于生成多样化的,验证的参考放射治疗计划.
- 实施工作流程,将现实的错误引入到这些计划中,以模拟临床场景.
- 为测试和比较各种剂量测量审计方法创建一个乱计划队列.
主要方法:
- 使用RayStation软件开发了16个强度调节辐射疗法 (IMRT) 和体积调节弧形疗法 (VMAT) 的参考计划.
- 在四个幻影几何体的多离子室幻影中验证了计划.
- 在144个基于社区错误分布的计划中引入了9种类型的剂量测量误差 (例如,光束建模,MLC参数,校准).
- 评估剂量对临床目标体积 (CTV) 和风险器官 (OAR) 的影响.
主要成果:
- 引入的错误导致剂量干扰,范围为<1%至>10% (CTV平均剂量) 和<10%至>30% (OAR接近最大剂量).
- 144个计划提出了明确的"通过"和"失败"情景,以及接近值的结果.
- 计划的复杂性显著影响了剂量偏差,平均MLC Gap指标有效地捕捉了这种关系.
结论:
- 成功开发了一个强大的框架,用于创建带有扰动的参考计划.
- 该框架允许评估和比较各种剂量计审计和计划特定质量保证 (PSQA) 方法.
- 全球协调小组 (GHG) 制定了这一框架,以测试审计系统的可比性,并支持国际剂量计审计的协调.
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