运动分析比较表面成像和隔膜跟踪在kV投影的深呼吸呼吸 (DIBH) 的呼吸
Mingli Chen1, Tsuicheng Chiu1, Michael R Folkert2
1Department of Radiation Oncology, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA.
概括
表面导向成像 (SGI) 显示在深呼吸呼吸 (DIBH) 放射治疗期间与内部隔膜运动的有限相关性. 需要进一步的研究,以了解表面和内部运动之间的关联,以改善患者监测.
科学领域:
- 放射治疗 物理 物理
- 医疗成像医学成像
- 辐射瘤学 辐射瘤学
背景情况:
- 表面导向成像 (SGI) 对于在深呼吸呼吸 (DIBH) 放射治疗期间监测患者运动至关重要.
- 了解表面和内部运动之间的联系对于有效的放射治疗监测至关重要.
研究的目的:
- 评估通过表面导向放射治疗 (SGRT) 检测到的表面运动与通过隔膜运动跟踪的内部运动之间的关系.
- 在DIBH期间使用kV投影测量了内部运动,用于在线圆束计算机断层扫描 (CBCT).
主要方法:
- 从10名患者同时获取SGI和kV数据,超过200次喘息 (BH).
- 隔膜跟踪涉及多项式曲线适应衍生kV图像和高通过.
- 在SGI和kV跟踪之间,上下 (SI) 和前后 (AP) 运动的统计比较.
主要成果:
- 相关性是BH数据的不充分度量,单个中位数从-0.07到0.73.7不等.
- 在SGI-SI和kV之间,绝对差异的中位数为0.73mm (第95百分位数为3.46mm);对于SGI-AP,它们为0.55mm (第95百分位数为2.80mm).
- 在3毫米门内,呼吸间持久协议为SGI-SI/kV的61%,SGI-AP/kV的56%.
结论:
- 在DIBH放射治疗期间,表面和隔膜运动之间存在有限的关联.
- 在kV跟踪和DIBH数据中的限制影响了观察到的关联.
- 建议进行进一步的研究,以澄清放射治疗中表面和内部运动之间的关系.
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