Application of rapid daily quality assurance for pencil beam scanning proton therapy system
10.3969/j.issn.1005-202X.2024.10.003
- VernacularTitle:PBS质子治疗系统快速日检QA方案的应用研究
- Author:
Renchao ZHENG
1
;
Xiaoguang LU
;
Weiqing WU
;
Zhiping XIAO
;
Fei LIU
;
Guangyuan HU
;
Xianglin YUAN
Author Information
1. 华中科技大学同济医学院附属同济医院肿瘤科,湖北 武汉 430030
- Keywords:
Sphinx Compact;
pencil beam scanning;
proton therapy system;
daily quality assurance
- From:
Chinese Journal of Medical Physics
2024;41(10):1206-1210
- CountryChina
- Language:Chinese
-
Abstract:
Objective To analyze the daily quality assurance(QA)measurement results of IBA Sphinx Compact device on the Mevion compact pencil beam scanning proton therapy system for evaluating its clinical application value in proton therapy.Methods The daily QA measurement of Mevion S250i proton therapy system was carried out with Sphinx Compact device for 30 consecutive days,and the measurement results were analyzed.Results The average deviation between the positioning laser and the image center was(0.42±0.27)mm in 30 days.All of the proximal and distal depth errors of the high-and low-energy pencil beams were within 0.50 mm.The position deviation of all the spots measured did not exceed 1.00 mm,and the size deviation was less than 7.5%.The deviation between the image center and the beam center was not more than 0.75 mm.The relative deviation of the flatness of the rectangular field was about 0.5%.The deviation of the output dose of the square field was within 1.0%.Conclusion The proton system daily QA measurement items recommended by AAPM TG-224 report can be accurately and rapidly measured with Sphinx Compact device.The device is a practical and efficient daily QA tool with high practical value in clinic.
