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arXiv 2104.00784physics.med-ph
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全自动非共面放射治疗治疗计划

Fully Automated Noncoplanar Radiation Therapy Treatment Planning

Charles Huang, Yong Yang, Lei Xing

摘要:

与传统的共面技术相比,非共面放射治疗治疗计划具有提高剂量测定质量的潜力。同样,自动化治疗计划算法可以减少计划者的主动治疗计划时间并消除计划者间的可变性。为了解决传统治疗计划的局限性,我们一直在开发一套算法称为站参数优化放射治疗(SPORT)。在SPORT的算法套件,我们提出了一种方法,称为NC-POPS生产noncoplanar(NC)计划使用全自动帕累托最优投影搜索(POPS)算法。我们的NC-POPS算法扩展了原有的POPS算法的非共面设置与潜在的应用IMRT和VMAT。该算法由两个主要部分组成:1)非共面波束角优化(BAO)和2)使用POPS算法的全自动逆规划。我们通过比较不同的非共面和共面配置来评估NC-POPS的性能。为了评估计划质量,我们计算了各种危险器官(OAR)的均匀性指数(HI)、一致性指数(CI)和剂量体积直方图(DVH)统计。与评估的共面基线方法相比,所提出的NC-POPS方法实现了显著更好的OAR节省、相当或更好的剂量一致性以及类似的剂量均匀性。我们提出的NC-POPS算法提供了一个模块化的方法,完全自动化的治疗计划的非共面调强放射治疗的情况下,有可能大大提高治疗计划的工作流程和计划质量。

英文摘要:

Noncoplanar radiation therapy treatment planning has the potential to improve dosimetric quality as compared to traditional coplanar techniques. Likewise, automated treatment planning algorithms can reduce a planner's active treatment planning time and remove inter-planner variability. To address the limitations of traditional treatment planning, we have been developing a suite of algorithms called station parameter optimized radiation therapy (SPORT). Within the SPORT suite of algorithms, we propose a method called NC-POPS to produce noncoplanar (NC) plans using the fully automated Pareto Optimal Projection Search (POPS) algorithm. Our NC-POPS algorithm extends the original POPS algorithm to the noncoplanar setting with potential applications to both IMRT and VMAT. The proposed algorithm consists of two main parts: 1) noncoplanar beam angle optimization (BAO) and 2) fully automated inverse planning using the POPS algorithm. We evaluate the performance of NC-POPS by comparing between various noncoplanar and coplanar configurations. To evaluate plan quality, we compute the homogeneity index (HI), conformity index (CI), and dose-volume histogram (DVH) statistics for various organs-at-risk (OARs). As compared to the evaluated coplanar baseline methods, the proposed NC-POPS method achieves significantly better OAR sparing, comparable or better dose conformity, and similar dose homogeneity. Our proposed NC-POPS algorithm provides a modular approach for fully automated treatment planning of noncoplanar IMRT cases with the potential to substantially improve treatment planning workflow and plan quality.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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