The impact of dose calculation algorithm for SBRT lung cancer radiotherapy treatment

Q3 Health Professions

Iranian Journal of Medical Physics Pub Date : 2021-09-15 DOI:10.22038/IJMP.2021.56733.1951

Ahmed Rizk Ali Mostafa, Abdelwassie Hussein, M. Galal, K. Shahat

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引用次数: 0

Abstract

Introduction: The study aimed to provide the dose accuracy effects between Anisotropic Analytical algorithm (AAA) and the deterministic solver Acuros XB (AXB) that are available on Eclipse TPS (Varian Medical Systems, Palo Alto, CA) treatment planning system (TPS). The different is due to the electron transport difference in case of small fieldsMaterial and methods: For the study non-small cell lung cancer (NSCLC) patient CT scans are used to do retrospective SBRT plans via AAA and recalculated by AXB dose calculation algorithms using Eclipse treatment planning system. The main dosimetric comparison parameters are: Conformity index (CI), Homogeneity Index (HI), Gradient Index (GI), Target mean dose and calculation time. Results: Based on the results, the CI is (1.45±0.55) to (1.85±0.7). The HI are (0.15±0.07) and (0.13±0.08), the Gradient index GI for AAA were (4.8±2.6) and for AXB reaches to (7.4±3.8) and the maximum dose for PTV are differed about 2.3% to 4.5%, mean dose and the calculation time significant similar for AAA and AXB respectively.Conclusion: As the findings using the deterministic solver AXB in calculation for case of low density like lung cases is more accurate than AAA calculation Algorithm in SBRT treatment

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剂量计算算法对SBRT肺癌放疗治疗的影响

简介：该研究旨在提供各向异性分析算法（AAA）和Eclipse TPS（Varian Medical Systems，Palo Alto，CA）治疗计划系统（TPS）上可用的确定性求解器Acuros XB（AXB）之间的剂量准确性影响。不同的原因是小电场情况下的电子传输差异材料和方法：对于研究非小细胞肺癌NSCLC）患者的CT扫描，通过AAA进行回顾性SBRT计划，并使用Eclipse治疗计划系统通过AXB剂量计算算法重新计算。主要的剂量比较参数有：一致性指数（CI）、均匀性指数（HI）、梯度指数（GI）、目标平均剂量和计算时间。结果：根据结果，CI为（1.45±0.55）至（1.85±0.7）。HI为（0.15±0.07）和（0.13±0.08），AAA的梯度指数GI为（4.8±2.6），AXB达到（7.4±3.8），PTV的最大剂量相差约2.3%至4.5%，AAA和AXB的平均剂量和计算时间分别显著相似。结论：在SBRT治疗中，使用确定性求解器AXB计算低密度类肺病例的结果比AAA计算算法更准确

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

Iranian Journal of Medical Physics Health Professions-Radiological and Ultrasound Technology

CiteScore

1.00

自引率

0.00%

发文量

审稿时长

8 weeks

期刊介绍： Iranian Journal of Medical Physics (IJMP) is the official scientific bimonthly publication of the Iranian Association of Medical Physicists. IJMP is an international and multidisciplinary journal, peer review, free of charge publication and open access. This journal devoted to publish Original Papers, Review Articles, Short Communications, Technical Notes, Editorial and Letters to the Editor in the field of “Medical Physics” involving both basic and clinical research. Submissions of manuscript from all countries are welcome and will be reviewed by at least two expert reviewers.