摘要
背景与目的:目前移动式电子束术中放疗已成为多种恶性肿瘤重要的辅助治疗手段,本研究旨在建立该系统的日常质量保证(quality assurance,QA)程序并评价其剂量参数的稳定性。方法:QA程序包括安全性及功能性和能量指标及输出剂量的测试,并对2年来质控数据进行分析,评价剂量参数的稳定性。结果:安全性和功能性的测试结果均正常;4、6、9和12 MeV电子束的能量指标分别为(0.666±0.015)mm、(0.839±0.009)mm、(0.781±0.010)mm和(0.724±0.009)mm,输出剂量误差分别为(0.511±0.671)%、(0.278±0.516)%、(0.368±0.532)%和(0.382±0.912)%,均符合相应标准且无随时间变化的趋势。结论:建立的日常QA程序适合于术中放疗系统,且该系统自身的稳定性能满足临床使用要求。
Background and purpose： Currently, intraoperative radiation therapy （IORT） has become the adjuvant therapy of cancer. The study was to establish the daily quality assurance （QA） program and analyze dosiometric characteristics＇ long-term stability for mobile IORT accelerator. Methods： The QA program of this study included two parts： safety and functionality and energy and output. The two years＇ QA datasets were acquired and analyzed to investigate the stability of energy and output. Results： All safety and functionality tests passed on a daily basis. The energy index was （0.666±0.015）mm, （0.839±0.009）mm, （0.781 ±0.010）ram, （0.724±0.009）mm and the output dose error was （0.511±0.671）%, （0.278 ± 0.516）%, （0.368 ±0.532）%, （0.382±0.912）% for all energy, respectively. There was no significant time trend in the dosimetric characteristics. Conclusion： The daily QA program is suitable for mobile IORT accelerator. The long-term stability is acceptable for IORT in clinical use.
出处
《中国癌症杂志》
CAS
CSCD
北大核心
2014年第1期52-56,共5页
China Oncology
关键词
术中放疗
质量保证
稳定性
Intraoperative radiation therapy
Quality assurance
Long-term stability
