基于蒙特卡罗代码的XHA600D医用直线加速器剂量学特性研究

IF 1 4区工程技术 Q3 NUCLEAR SCIENCE & TECHNOLOGY

Science and Technology of Nuclear Installations Pub Date : 2022-09-29 DOI:10.1155/2022/7712498

Ningyu Wang, Fengjie Cui, Shaoxian Gu, Chuou Yin, Shengyuan Zhang, Jinyou Hu, Yunzhu Cai, Zhangwen Wu, Jun Wang, Chengjun Gou

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引用次数: 0

摘要

通过研究初始电子对剂量特性的影响，为标称6 XHA600D加速器的MV光子束最终建立，即6 径向强度FWHM为2.5的MeV单能电子束 mm和0.15°的角发散。基于合理的初始参数，在4 × 4至30 × 30 用EGSnrc代码对cm2进行了系统的模拟。模拟的剂量特性不仅与测量结果非常一致，而且FF和FFF光束之间的剂量差异也与以前对其他加速器的研究规律一致。因此，合理的入射电子参数能够准确地验证XHA600D加速器的性能，并可用于进一步的剂量测定研究。

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The Study of Dosimetric Characteristics of the XHA600D Medical Linear Accelerator Based on a Monte Carlo Code

By investigating the influence of initial electrons on dosimetric characteristics, reasonable incident electron parameters for the nominal 6 MV photon beam of the XHA600D accelerator are finally established, i.e., a 6 MeV monoenergetic electron beam with a radial intensity FWHM of 2.5 mm and an angular divergency of 0.15°. Based on reasonable initial parameters, Percentage Depth Doses (PDDs), Off-Axis Ratios (OARs), total scatter factors, beam qualities, and penumbra widths of both flatteningfilter (FF) and flattening-filter-free (FFF) beams for fields ranging from 4 × 4 to 30 × 30 cm2 are simulated systematically with EGSnrc codes. Not only the simulated dosimetric properties are in excellent agreement with the measurements, but also the dosimetric discrepancies between FF and FFF beams are consistent with the laws of previous studies on other accelerators. Therefore, reasonable incident electron parameters are able to accurately verify the performance of the XHA600D accelerator and can be used for further dosimetry research.

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来源期刊

Science and Technology of Nuclear Installations NUCLEAR SCIENCE & TECHNOLOGY-

CiteScore

2.30

自引率

9.10%

发文量

审稿时长

4-8 weeks

期刊介绍： Science and Technology of Nuclear Installations is an international scientific journal that aims to make available knowledge on issues related to the nuclear industry and to promote development in the area of nuclear sciences and technologies. The endeavor associated with the establishment and the growth of the journal is expected to lend support to the renaissance of nuclear technology in the world and especially in those countries where nuclear programs have not yet been developed.