AFI manual planning versus HyperArc auto-planning: A head-to-head comparison of SRS plan quality

IF 2 4区医学 Q3 RADIOLOGY, NUCLEAR MEDICINE & MEDICAL IMAGING

Journal of Applied Clinical Medical Physics Pub Date : 2024-09-05 DOI:10.1002/acm2.14503

Dharmin D. Desai, Ivan L. Cordrey, E. Lee Johnson, Thomas A. Oldland

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引用次数: 0

Abstract

Introduction

HyperArc (HA) auto-planning offers simplicity for the end user and consistently high-quality SRS plans. The “Ask For It” (AFI) optimization strategy offers a manual planning technique that, when coupled with R50%_Analytic, can be guided to deliver a plan with an intermediate dose spill “as low as reasonably achievable” and high target dose conformity. A direct comparison of SRS plan quality obtained using the manual planning AFI strategy and HA has been performed.

Methods

Using a CT data set available from the Radiosurgery Society, 54 PTVs were created and used to generate 19 individual SRS/SRT cases. Case complexity ranged from single PTV plans to multiple PTV plans with a single isocenter. PTV locations ranged from relative isolation from critical structures to lesions within 1.5 mm of the optic apparatus and abutting the brainstem. All cases were planned using both the AFI and HA optimization strategies as implemented in the Varian Medical Systems Eclipse Treatment Planning System. A range of treatment plan quality metrics were obtained including Intermediate Dose Spill (R50%), Conformity Indices CI_RTOG and CI_Paddick, PTV Dose Coverage (Dn%), PTV Mean Dose, and Modulation Factor. The Wilcoxon Signed Rank Sum non-parametric statistical method was utilized to compare the obtained plan quality metrics.

Results

Statistically significant improvements were found for the AFI strategy for metrics R50%, CI_RTOG, CI_Paddick, and PTV Mean Dose (p < 0.001). HA achieved superior coverage for Dn% (p = 0.018), while the Modulation Factors were not significantly different for AFI compared to HA optimization (p = 0.13).

Conclusion

This study provides evidence that the AFI manual planning strategy can produce high-quality planning metrics similar to the HA auto-planning method.

Abstract Image

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AFI 人工规划与 HyperArc 自动规划：SRS 计划质量的正面比较。

简介HyperArc（HA）自动规划为最终用户提供了简便的操作和始终如一的高质量 SRS 计划。询问它"（AFI）优化策略提供了一种手动规划技术，与 R50%Analytic 相结合，可指导提供具有 "尽可能低 "的中间剂量溢出和高目标剂量一致性的计划。对使用人工规划 AFI 策略和 HA 获得的 SRS 计划质量进行了直接比较：方法：使用放射外科协会提供的 CT 数据集创建了 54 个 PTV，并用于生成 19 个 SRS/SRT 病例。病例的复杂程度从单个 PTV 计划到具有单个等中心的多个 PTV 计划不等。PTV 的位置从与关键结构相对隔离到距离视器 1.5 毫米以内并与脑干相邻的病变不等。所有病例均使用瓦里安医疗系统公司Eclipse治疗计划系统中实施的AFI和HA优化策略进行计划。获得了一系列治疗计划质量指标，包括中间剂量溢出（R50%）、一致性指数CIRTOG和CIPaddick、PTV剂量覆盖率（Dn%）、PTV平均剂量和调制因子。采用 Wilcoxon Signed Rank Sum 非参数统计方法对获得的计划质量指标进行比较：结果：在 R50%、CIRTOG、CIPaddick 和 PTV 平均剂量等指标上，AFI 策略均有统计学意义的改善（p 结论：该研究证明，AFI 策略能有效提高计划质量：本研究提供的证据表明，AFI 手动规划策略可以产生与 HA 自动规划方法类似的高质量规划指标。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Journal of Applied Clinical Medical Physics 医学-核医学

CiteScore

3.60

自引率

19.00%

发文量

331

审稿时长

3 months

期刊介绍： Journal of Applied Clinical Medical Physics is an international Open Access publication dedicated to clinical medical physics. JACMP welcomes original contributions dealing with all aspects of medical physics from scientists working in the clinical medical physics around the world. JACMP accepts only online submission. JACMP will publish: -Original Contributions: Peer-reviewed, investigations that represent new and significant contributions to the field. Recommended word count: up to 7500. -Review Articles: Reviews of major areas or sub-areas in the field of clinical medical physics. These articles may be of any length and are peer reviewed. -Technical Notes: These should be no longer than 3000 words, including key references. -Letters to the Editor: Comments on papers published in JACMP or on any other matters of interest to clinical medical physics. These should not be more than 1250 (including the literature) and their publication is only based on the decision of the editor, who occasionally asks experts on the merit of the contents. -Book Reviews: The editorial office solicits Book Reviews. -Announcements of Forthcoming Meetings: The Editor may provide notice of forthcoming meetings, course offerings, and other events relevant to clinical medical physics. -Parallel Opposed Editorial: We welcome topics relevant to clinical practice and medical physics profession. The contents can be controversial debate or opposed aspects of an issue. One author argues for the position and the other against. Each side of the debate contains an opening statement up to 800 words, followed by a rebuttal up to 500 words. Readers interested in participating in this series should contact the moderator with a proposed title and a short description of the topic