在头部和部放射治疗期间使用卡尔曼波器追踪方法进行体积成像
Chen Cheng1, Mark Gardner1, Owen Dillon1
1Image X Institute, The University of Sydney, Eveleigh, New South Wales, Australia.
Physics in medicine and biology
|July 23, 2025
概括
这项研究引入了卡尔曼波器 (KF) 追踪方法,用于放射治疗期间实时3D头部和部 (H&N) 成像. 该KF方法准确地跟踪瘤和有风险的器官 (OARs),提高几何精度和患者安全.
科学领域:
- 医学物理 医学物理
- 辐射疗法 辐射疗法
- 图像指导疗法是指导图像的疗法.
背景情况:
- 在治疗期间进行体积成像对于头癌 (H&N) 放射治疗至关重要.
- 需要运动管理策略来提高几何精度并保护处于危险的器官 (OAR).
研究的目的:
- 开发和评估卡尔曼波器 (KF) 追踪方法,用于使用二维X射线投影进行实时3D H&N解剖成像.
- 评估KF跟踪瘤和风险器官 (OAR) 的准确性,与没有跟踪相比.
主要方法:
- 开发了一种KF方法,可以从2DX射线投影中实时生成3D图像.
- 该KF纳入了3D到2D投影几何和可变形向量场 (DVF).
- 一项模拟研究使用H&N患者数据,将KF跟踪与标准护理 (无跟踪) 进行比较,使用心状误差,豪斯多夫距离和Dice系数.
主要成果:
- 与没有跟踪相比,KF跟踪显著减少了所有轴上的平均瘤中枢神经错误.
- 瘤轮的第95百分位豪斯多夫距离在KF跟踪时较小.
- 对于瘤和OAR (例如,脑干,脊髓),KF跟踪比没有跟踪获得更高的Dice系数.
结论:
- 开发的KF跟踪方法可以在治疗过程中准确地实时对H&N解剖进行体积成像.
- 这些发现表明,在H&N放射治疗中改善几何精度和节省OAR的潜在临床应用.
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