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临床技术:在表面导向放射治疗中评估检测准确度,使用来自不同治疗计划系统的CT参考

Masahide Saito¹, Koji Ueda², Hikaru Nemoto²

¹Department of Radiology, University of Yamanashi, 1110 Shimokato, Chuo-City, Yamanashi, 409-3898, Japan. masahides@yamanashi.ac.jp.

Radiological physics and technology

|June 23, 2025

概括

沃克塞兰表面导向辐射疗法 (SGRT) 系统显示检测精度在1毫米以内,但不同辐射治疗计划系统 (RTPS) 发生变化. 建议一致使用RTPS,以获得可靠的SGRT性能.

科学领域:

医学物理医学物理
辐射瘤学辐射瘤学
图像指导疗法是指导图像的疗法.

背景情况:

表面导向辐射疗法 (SGRT) 提高了治疗的精度.
准确的患者定位对于有效的辐射输送至关重要.
治疗计划系统的变化可能会影响SGRT的性能.

研究的目的:

为了评估VOXELAN SGRT系统的检测准确度.
评估不同辐射治疗计划系统 (RTPS) 对VOXELAN准确性的影响.
为了确定CT切片厚度对SGRT检测的影响.

主要方法:

用了两个幻影来评估6轴位置匹配的准确性.
使用多个具有默认设置的RTPS生成CT参考体表面.
评估了使用1毫米和2毫米切片厚度的VOXELAN SGRT系统性能.

主要成果:

沃克塞兰通常在1毫米内达到检测准确度.
在不同RTPS之间观察到大约2毫米的轮变化.
一些RTPS组合导致纵向和横向的误差超过1mm.
CT切片厚度对检测准确度的影响最小.

结论:

使用的RTPS对VOXELAN SGRT检测准确度有轻微的影响.
建议一致使用RTPS以获得最佳和可解释的SGRT结果.
在SGRT中依赖RTPS的错误可能是复杂的,难以管理.

关键词:

参考CT,参考CT,参考CT.迪科姆 (DICOM) 的参考数据这是SGRTT.处理计划系统的处理计划系统.

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