应用基于模型的剂量计算算法对皮肤癌支架疗法 (干预放射疗法) 的剂量测量影响
Elisa Placidi1, Bruno Fionda2, Enrico Rosa3
1UOC Fisica per le Scienze della Vita, Dipartimento di Diagnostica per Immagini, Radioterapia Oncologica ed Ematologia, Fondazione Policlinico Universitario Agostino Gemelli, IRCCS, Rome, Italy.
Journal of contemporary brachytherapy
|January 17, 2024
概括
新的支臂治疗剂量计算 (TG-186) 与TG-43相比显示出差异,特别是在皮肤瘤方面. 使用含有TG-186的水玻尿酸改善了目标覆盖率,突出了其潜在的临床益处.
科学领域:
- 医学物理 医学物理
- 放射疗法是一种放射治疗.
- 在瘤学瘤学.
背景情况:
- 支臂疗法 (BT) 是一种放射疗法技术,它向瘤输送高剂量,同时保护有风险的器官 (OAR).
- 目前的标准剂量计算算法是TG-43.
- 基于模型的剂量计算算法 (MBDCA),如Elekta在TG-186下的先进的崩圆引擎 (ACE),提供了潜在的进步,但需要临床验证.
研究的目的:
- 用TG-43和TG-186计算的剂量分布进行比较,用于皮肤瘤.
- 使用TG-186.研究水玻尿酸对临床目标体积 (CTV) 和OAR覆盖率的影响.
主要方法:
- 使用TG-43计算了10个高剂量率IRT计划,并使用TG-186重新计算.
- 对TG-43和TG-186的不同水球厚度 (0-5厘米) 的一个计划进行了分析.
- 剂量体积组图 (DVH) 参数 (D2cc,D0.01cc用于OARs;V150,V100,V95,V90用于CTV) 进行了比较.
主要成果:
- 与TG-43相比,TG-186的计算给出了CTV和OAR的统计学上显著较低的平均剂量值.
- 一个水球通过TG-186算法增强了CTV覆盖范围.
- 根据ACE的计算,TG-43与2厘米厚的球体相匹配.
结论:
- 皮肤瘤的TG-43和TG-186之间存在显著的剂量差异.
- 在TG-186计算中,加入水球改善了CTV覆盖率,这表明它在优化支臂疗法治疗中发挥了潜在作用.
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