Acceptance test of beam performance and mechanical precision of the first Mevion type S250i proton therapy system in China
10.3969/j.issn.1672-8270.2024.09.003
- VernacularTitle:迈胜S250i型质子治疗系统的束流性能及机械精度验收测试
- Author:
Weiqing WU
1
;
Xiaoguang LU
;
Renchao ZHENG
;
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 武汉 430030
- Keywords:
Proton therapy system;
Acceptance test;
Beam performance;
Mechanical precision;
Adaptive aperture(AA)
- From:
China Medical Equipment
2024;21(9):13-17
- CountryChina
- Language:Chinese
-
Abstract:
Objective:To discuss the acceptance test of beam performance and mechanical precision of the first Mevion type S250i proton therapy system in China,and verify the stability and reliability of that in clinical treatment.Methods:According to the requirements of acceptance report of manufacturer,the output and range of machine unit(MU),the accuracy and stability of size and position of beam spot,the penumbra and position accuracy of adaptive aperture(AA)of Mevion type S250i proton therapy system,as well as the tests of mechanical properties and functions of the requirement of clinical use,were checked and tested for acceptance.Results:The maximum deviation of MU output was 1.3%,and the maximum deviation of the range was 0.037 g/cm2,and the maximum distal fall-off was 0.465 cm,and the minimum range of energy modulation was 0.21 g/cm2.The maximum deviations of the size of beam spot and the maximum deviation of the position were respectively 0.07 cm and 0.05 cm.The maximum AA penumbra was 0.007 cm,and the AA position accuracy was less than 0.1 cm.Conclusion:The acceptance test of the Mevion type S250i proton therapy system indicates that the parameters of the beam performance and mechanical precision can meet the requirements of the acceptance contract and AAPM-TG224 report of manufacturer,which has verified the machine has better favorable stability and reliability.
