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斑点优化减少了肝脏呼吸中的光束传递时间,保持强度调节的质子疗法

Michael Butkus¹, Daniel Bastawros¹, Yunze Yang¹

¹Department of Radiation Oncology, University of Miami Miller School of Medicine, Sylvester Comprehensive Cancer Center, Miami, FL, USA.

Physics and imaging in radiation oncology

|April 21, 2025

概括

一个新的点优化算法显著减少了超过三分之一的肝强度调制质子疗法 (IMPT) 交付时间,同时保持了患者的计划质量和交付能力.

科学领域:

医学物理医学物理
辐射瘤学辐射瘤学
医疗成像医学成像

背景情况:

肝脏治疗的强度调节质子疗法 (IMPT) 通常需要减轻运动,增加整体治疗时间.
开发了一种原型的点优化算法,以解决肝脏IMPT的延长治疗时间.

研究的目的:

评估原型现场优化算法的有效性,以减少肝脏IMPT计划交付时间.
通过使用点优化算法来评估用剂量-体积组图 (DVH) 度量衡量的治疗质量是否得到维护.

主要方法:

接受肝脏IMPT的15名患者使用名义设置和原型点优化算法进行了重新规划,采用各种最小监测单元 (MU) 和层间隔设置 (1MU/1MeV,3MU/3MeV,1MU/5MeV,5MU/3MeV).
使用标准DVH指标和威尔科克森签名等级测试来比较现场优化和名义计划.
测量了交付时间,并使用质量保证 (QA) 计划进行马分析 (3%/3mm标准) 来评估可交付性.

主要成果:

与名义计划相比,现货优化计划在DVH指标上显示出极小的差异.
3MU/3MeV设置导致没有显著的DVH度量差异,并减少了40%的交付时间.
5MU / 3MeV设置将分娩时间减少了59%,但显示肝脏_EffD_mean的小而显著增加. 所有经过测试的现场优化计划都在临床上可交付.

结论:

原型点优化算法成功生成了临床可交付的肝脏IMPT计划.
与名义计划相比,这种算法显著减少了超过三分之一的治疗交付时间.
现场优化方法提供了一种有前途的方法,可以提高肝脏IMPT的效率,而不会影响治疗质量.

关键词:

肝脏辐射照射是如何进行的质子疗法是一种质子疗法.处理效率的处理效率.

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