Varian On-Board Imager(OBI)常规测量方法及质量保证  

Routine Measurement Method and Quality Assurance Procedure on Varian On-Board Imager

作　　者：柳先锋[1] 刘翔宇[1] 何亚男[1] 尹文娟[1] 靳富[1] 

机构地区：[1]重庆市肿瘤研究所放疗科,重庆400030

出　　处：《中国医学物理学杂志》2011年第1期2344-2347,2394,共5页Chinese Journal of Medical Physics

摘　　要：目的:通过建立一套OBI系统的常规测量方法,探讨放射治疗中利用OBI系统进行摆位验证的质量保证(QA)内容。方法:利用质量保证工具和体模对VarianIX加速器的OBI系统进行每日、每周、每月、每年的常规测量,完成质量保证项目检测。结果:OBI系统的操作安全性,几何准确性和图像质量均在允许范围内。OBI系统的等中心准确性测量误差平均为0.1cm、SAD检查结果为85.1cm、Blade的位置检测误差为0.08cm,均在允许的误差范围之内,安全性检查、OBI和CBCT模式的图像质量检查均正常。结论:定期的质量保证检测表明,VarianIX的OBI系统性能稳定可靠,满足临床使用要求。Objective:To establish a conventional measurement method and contents of verification of quality assurance for OBI in radiotherapy.Methods:Daily,weekly,monthly,annual measurements were performed to complete quality assurance program testing for OBI system using QA tools and phantom.Results:Operational safety,geometric accuracy and image quality of OBI system were within the allowable range and consistent with clinical requirements.The average measurement error of isocenter accuracy for OBI system was 0.1 cm...

关 键 词：放射治疗 OBI 质量保证 

分 类 号：R815[医药卫生—放射医学]