Modeling the Agility head of the VersaHD accelerator and its beam profile by Geant4: Logfile-based geometry implementation

IF 1.8 3区工程技术 Q3 CHEMISTRY, INORGANIC & NUCLEAR

Applied Radiation and Isotopes Pub Date : 2026-06-01 Epub Date: 2026-03-07 DOI:10.1016/j.apradiso.2026.112555

Le Van Tinh , Phan Viet Cuong , Nguyen Van Kien , Chau Ngoc Anh Minh , Pham Duc Khue , Nguyễn Thanh Bình , Le Tuan Anh

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引用次数: 0

Abstract

The motivation of this work is to develop a comprehensive Monte Carlo simulation code based on the Geant4 toolkit for modeling the Elekta Agility head of the VersaHD linear accelerator. This effort aims to support the treatment planning and medical research activities at Vietnam National Cancer Hospital. The code implementation allows reading the logfiles recorded during treatment and recalculating the actual patient dose distribution, which can be applied for patient-specific quality assurance (PSQA). The simulation model was validated through comparisons with experimental measurements, including percentage depth dose (PDD) and lateral dose profiles acquired using a water phantom and an ionization chamber dosimeter. A gamma index analysis demonstrated good agreement between simulation and measurement with the 3%/3 mm acceptance criteria for lateral dose profiles. Similarly, the PDD analysis with the 2%/2 mm acceptance criteria yielded equally satisfactory results.

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通过Geant4建模VersaHD加速器的敏捷头及其光束轮廓：基于logfile的几何实现

这项工作的动机是基于Geant4工具包开发一个全面的蒙特卡罗仿真代码，用于对VersaHD线性加速器的Elekta Agility头进行建模。这项工作旨在支持越南国立癌症医院的治疗计划和医学研究活动。代码实现允许读取治疗期间记录的日志文件并重新计算实际患者剂量分布，可用于患者特定质量保证（PSQA）。仿真模型通过与实验测量值的比较进行了验证，包括百分比深度剂量（PDD）和使用水幻影和电离室剂量计获得的侧向剂量分布。伽马指数分析表明，模拟和测量之间的良好一致性与3%/3 mm接受标准的侧向剂量剖面。同样，采用2%/2 mm接受标准的PDD分析也产生了同样令人满意的结果。

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

Applied Radiation and Isotopes 工程技术-核科学技术

CiteScore

3.00

自引率

12.50%

发文量

406

审稿时长

13.5 months

期刊介绍： Applied Radiation and Isotopes provides a high quality medium for the publication of substantial, original and scientific and technological papers on the development and peaceful application of nuclear, radiation and radionuclide techniques in chemistry, physics, biochemistry, biology, medicine, security, engineering and in the earth, planetary and environmental sciences, all including dosimetry. Nuclear techniques are defined in the broadest sense and both experimental and theoretical papers are welcome. They include the development and use of α- and β-particles, X-rays and γ-rays, neutrons and other nuclear particles and radiations from all sources, including radionuclides, synchrotron sources, cyclotrons and reactors and from the natural environment. The journal aims to publish papers with significance to an international audience, containing substantial novelty and scientific impact. The Editors reserve the rights to reject, with or without external review, papers that do not meet these criteria. Papers dealing with radiation processing, i.e., where radiation is used to bring about a biological, chemical or physical change in a material, should be directed to our sister journal Radiation Physics and Chemistry.