基于Ethos模板的规划和基于AI的剂量预测的比较:一般性能,患者的最佳性和限制
Benjamin Roberfroid1, Ana M Barragán-Montero1, David Dechambre2
1Université catholique de Louvain - Center of Molecular Imaging, Radiotherapy and Oncology (MIRO), Brussels, Belgium.
概括
基于模板的前列腺癌自动规划显示了令人满意的一般性表现,但在复杂的情况下存在局限性. 深度学习剂量预测加上剂量模拟在患者最佳计划生成中超过了基于模板的Ethos规划.
科学领域:
- 辐射瘤学 辐射瘤学
- 医学物理 医学物理
- 放射治疗规划 放射治疗规划
背景情况:
- 在线适应性放射治疗 (ART) 旨在通过在治疗期间调整计划来提高治疗准确性.
- 基于模板的自动剂量规划 (Etb) 为高效的ART提供了一个潜在的解决方案.
- 与深度学习等先进方法相比,评估Etb的性能对于临床采用至关重要.
研究的目的:
- 评估以Ethos模板为基础的前列腺癌自动规划 (Etb) 的整体性能.
- 评估Etb在生成最佳患者计划方面的能力.
- 将Etb与深度学习剂量预测和剂量模拟 (DP + DM) 进行比较.
主要方法:
- 进行了两项研究:S1研究与45名患者的手动计划 (MG) 进行了比较.
- 研究-S2分析了10个具有挑战性的案例,比较了EG_init,更新的Etb (EG_upd_selected),DP + DM和MG.
- 使用剂量-体积组图 (DVH) 度量对有风险的器官来评估计划质量.
主要成果:
- Etb (EG_init) 在剂量>50 Gy (平均差异<0.6%与MG) 的情况下表现令人满意.
- 较低剂量指标 (V30Gy直肠,V20Gy门) 与EG_init.init显示出较大的差异 (6.6%,13.0%).
- 与Etb相比,DP + DM在较小的度量差异 (3.4%,4.6%) 中取得了优异的结果,而不会影响高剂量约束.
结论:
- Etb为前列腺癌放射治疗提供了令人满意的一般性能.
- 基于模板的目标优化可以限制复杂的患者解剖学.
- 在这项研究中,深度学习剂量预测和剂量模拟 (DP + DM) 在患者最佳计划方面表现优于Etb.
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