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使用具有预设滚转角度的2D数组验证多损伤网络刀放射治疗计划的可行性研究方法.
Tengxiang Li1,2, Jinhu Chen1, Ruimin He2
1Department of Radiation Physics Shandong Cancer Hospital and Institute Shandong First Medical University and Shandong Academy of Medical Sciences Jinan Shandong Province P. R. China.
Precision radiation oncology
|October 30, 2025
概括
使用SRSmapcheck和预设滚动角度的新方法验证了内多伤口CyberKnife计划,每计划测量更多的目标. 这种方法可以提高复杂治疗的剂量分配精度.
科学领域:
- 医学物理 医学物理
- 辐射瘤学 辐射瘤学
- 放射性外科手术是如何进行的
背景情况:
- 使用SRSmapcheck验证内多重损伤的CyberKnife计划是具有挑战性的,原因是测量多个目标的局限性和缺乏滚动验证.
- 使用固定0°阵列设置的现有方法只测量一个目标,而其他目标则未经验证.
- 网络刀治疗计划系统缺乏对滚动验证工具的支持,X-sight信托标记指导与自由阵列滚动不兼容.
研究的目的:
- 开发和验证一种用于验证内多重损伤的新方法CyberKnife计划使用SRSmapcheck与预设滚动角度.
- 为了优化剂量分布验证在高剂量和快速变化的区域多损伤放射外科手术.
- 为了比较预设滚角方法与传统的固定0°验证方法的有效性.
主要方法:
- 创建了一个几何模型来确定SRSmapcheck阵列滚角和瘤间距之间的关系.
- SRSmapcheck和StereoPHAN计算机断层扫描 (CT) 图像以15°的间隔获得幻影图像.
- 使用固定0°和预设滚角方法验证了101个内多重损伤计划,随后进行了比较分析.
主要成果:
- 预设滚角方法评估了平均每计划2.34个目标,而固定0°方法的目标是1.32.
- 在马分析标准的2 mm / 1%和2 mm / 2%的方法之间,计划通过率保持稳定.
- 预设滚角验证的建议马分析标准为1mm/1%和1mm/2%以获得最佳结果.
结论:
- 使用预设的滚角方法进行SRSmapcheck,可以全面验证内多损伤的CyberKnife计划.
- 这种新的方法允许在单个验证会议内测量多个目标.
- 该研究建议使用特定的马分析标准 (1 mm / 1% 和 1 mm / 2%) 进行有效的预设滚角验证.
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