外部激光传感器的调试和稳定性评估,用于碳离子放射治疗中的呼吸道门
Tae-Ho Kim1, Soorim Han1, Dohyeon Yoo1
1Department of Radiation Oncology, Yonsei Cancer Center, Heavy Ion Therapy Research Institute, Yonsei University College of Medicine, Seoul, South Korea.
Journal of applied clinical medical physics
|December 29, 2025
概括
安扎伊激光系统为碳离子放射治疗 (CIRT) 提供准确,可靠的呼吸门,满足临床延迟需求. 它确保了稳定的跟踪,以提高辐射治疗中的剂量准确性.
科学领域:
- 医学物理 医学物理
- 放射治疗技术 放射治疗技术
- 生物医学工程 生物医学工程
背景情况:
- 呼吸运动显著挑战碳离子放射治疗 (CIRT),影响剂量准确性和器官安全.
- 传统的皮带传感器在设置可重复性和患者舒适性方面存在局限性.
- 基于非接触激光的系统正在成为呼吸道门的替代方案.
研究的目的:
- 评估ANZAI基于激光的呼吸门系统,用于CIRT.
- 根据总延迟,准确性和信号强度来评估系统性能.
- 在不同的模拟和临床条件下确定适用性.
主要方法:
- 通过对信号路径进行细分来量化总系统延迟.
- 使用可编程运动幻影来测试跟踪精度与各种呼吸模式.
- 对距离,角度,照明和激光干扰进行评估的信号强度.
- 在使用4DCT的志愿者中,与内部隔膜运动相关联的激光信号和评估皮带传感器兼容性.
主要成果:
- 总系统延迟低于100毫秒的值 (59.3毫秒光束启动,40.4毫秒光束关闭).
- 实现了高跟踪精度 (交叉相关性>0.99) 正常和不规则的呼吸.
- 在远距离 (9-17厘米) 和在黑暗中表现稳定的信号强度.
- 观察到与内部运动的强烈相关性 (r=0.986仰卧,r=0.961倾斜) 和优秀的带传感器互操作性 (r=0.99).
结论:
- 安扎伊激光传感器系统是准确的,可靠的,并满足呼吸门CIRT的延迟要求.
- 在各种呼吸条件下提供稳定的跟踪,确认临床准备.
- 建议垂直的传感器角度,以获得最佳的振幅准确度,并减轻交叉通话.
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