崩的圆叠加算法验证胸壁的触角场使用虚拟子过器
Ahad Zeinali1, Mikaeil Molazadeh2, Samaneh Ganjgahi1
1Department of Medical Physics, Faculty of Medicine, Urmia University of Medical Sciences, Urmia, Iran.
Journal of medical signals and sensors
|August 25, 2023
概括
虚拟形 (VW) 放射治疗确保了均的剂量分配. 这项研究验证了崩的圆叠加 (CCS) 算法.
科学领域:
- 医学物理 医学物理
- 辐射瘤学 辐射瘤学
背景情况:
- 虚拟 (VW) 在放射治疗中对于均的剂量分配至关重要,特别是在乳房切除术后的胸壁治疗中.
- 准确的剂量计算对于治疗计划系统 (TPS) 的质量保证至关重要.
- TECDOC-1583 和技术报告系列编号. 430强调需要评估剂量计算的准确性.
研究的目的:
- 在虚拟形 (VW) 场中评估崩的形叠加 (CCS) 算法的剂量计算准确性,用于乳腺癌胸壁的乳腺切除术后放射治疗.
- 使用ISOgray TPS在异质幻影中比较计算和测量剂量.
主要方法:
- 使用ISOgray TPS.在胸部幻影中规划了两个具有虚拟形 (VW) 角度的触角场.
- 收缩叠加 (CCS) 算法用于用6和15 MV光子束进行剂量计算.
- 用马指数评估剂量分布,将EBT3膜测量与TPS计算进行比较.
主要成果:
- 使用VW在异质介质中计算和测量剂量显示出良好的一致性 (88.0%-93.4%的接受率).
- 剂量计算没有受到角变化的显著影响.
- 在ISOgray TPS中,软组织剂量被高估,肺部剂量被低估.
结论:
- 崩的叠加 (CCS) 算法,当与虚拟形 (VW) 模型在异质环境中使用时,可以在可接受的范围内提供剂量分布.
- 玛指数分析证实了CCS算法的临床可接受性.
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