光学表面成像的每月质量保证自动化测试 动态定位精度精度
Kaleigh Young1, Eric A Wright2
1Medical Physics, University of British Columbia - Okanagan Campus, Kelowna, CAN.
Cureus
|April 15, 2024
概括
开发了一种自动化方法,用于表面导向辐射疗法 (SGRT) 系统的每月质量保证 (QA). 这种动态定位准确性测试确保SGRT系统符合辐射治疗的严格安全标准.
科学领域:
- 医学物理 医学物理
- 辐射瘤学 辐射瘤学
- 质量保证 质量保证 质量保证
背景情况:
- 美国医学物理学家协会 (AAPM) 工作组 (TG) 302报告概述了表面导向辐射疗法 (SGRT) 系统的质量保证 (QA).
- 一个关键的建议是每月对SGRT系统进行动态定位精度测试.
研究的目的:
- 开发SGRT系统每月动态本地化QA的自动化程序.
- 为了验证自动化SGRT QA的准确性和可靠性.
主要方法:
- 一个人形头部幻影被安装在一个Linac沙发上,并通过预定义的翻译和旋转移动.
- 在每个步骤中都获得了MV图像,并进行了SGRT系统监控.
- 在MV成像,linac轨迹日志和SGRT识别日志之间进行了比较,以获得翻译和旋转的准确性.
主要成果:
- 所有经过测试的转换和旋转都保持在AAPM TG-142推的刻板体除性体辐射疗法 (SABR) 耐受性值内.
- 翻译的最大偏差为-0.94mm (MV成像),-0.11mm (轨迹日志),和-0.78mm (识别日志).
- 旋转的最大偏差为0.01度 (轨迹日志) 和-0.2度 (识别日志).
结论:
- 拟议的自动化方法为SGRT系统的每月动态本地化QA提供了一个简单而有效的方法.
- 这种自动化有助于在放射治疗中保持高标准的准确性和安全性.
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