A shielding calculation software for medical linear accelerator room
10.3760/cma.j.cn113030-20241001-00377
- VernacularTitle:医用直线加速器机房屏蔽验算软件的研发和应用
- Author:
Kelin LUO
1
;
Lian ZOU
1
Author Information
1. 四川省医学科学院·四川省人民医院（电子科技大学附属医院），肿瘤中心，成都 610072
- Publication Type:Journal Article
- Keywords:
Medical linear accelerator;
Shielding verification software;
GBZ/T 201-2011 standards;
Shielding design
- From:
Chinese Journal of Radiation Oncology
2025;34(7):697-704
- CountryChina
- Language:Chinese
-
Abstract:
Objective:To develop a medical linear accelerator shielding verification software, in accordance with the GBZ/T 201-2011 standards, aiming to deliver rapid and precise evaluation of shielding design schemes for linear accelerator rooms.Methods:The software named "PsGBZ/T201" was developed using Python-based programming language based on the PyRERT platform, utilizing its graphical user interface and visualization tools to achieve the verification function of shielding for single-photon linear accelerator rooms. The design of PsGBZ/T201 strictly adhered to the GBZ/T 201-2011 standards, implementing calculations for the shielding thickness of the primary barriers (focus points C, D, F), secondary barriers (focus points A, B, G), lateral barriers (focus point E), inner (focus point H1) and outer (focus point I) walls of the maze, the thickness of the lead door (focus point H2) and the width of primary barriers, and digitizing key datasets to enhance efficiency and accuracy.Results:PsGBZ/T201 implemented 3 types of layout for linear accelerator machine rooms, visualized the plan and section of the machine room, and automatically selected the focus points of the machine room. The GBZ/T calculator module allowed users to easily count the weekly workload and automatically calculate the weekly exposure time. The concrete thicknesses of focus points A, B, C, D, E, F, G, H1 and I in the output results of PsGBZ/T201 were 116.7, 132.6, 206.6, 226.4, 122.2, 170.7, 94.3, 113.5 and 108.8 cm, respectively. The width of the primary barriers where focus points C, D, and F located were 334, 334, and 394 cm, and the lead thickness of focus point H2 was 1.1 cm. The concrete thicknesses of focus points A, B, C, D, E, F, and G in the report were 117, 133, 207, 227, 121, 171 and 94 cm, respectively. The manually calculated widths of the primary barriers for focus points C, D, and F were 335, 335, and 395 cm, respectively. The manually calculated concrete thicknesses for focus points I and H1 were 108.8 and 113.6 cm, and the manually calculated lead thickness for H2 is 1.1 cm. The results were highly consistent, with minor differences due to the different number of decimal places used.Conclusions:The PsGBZ/T201 is an efficient and accurate tool for swift verification of the accuracy of linear accelerator room design. It is suitable for evaluating the existing design schemes and for direct development of new shielding design work.
