中国医疗设备2018，Vol.33Issue(7)：37-40,47,5.DOI:10.3969/j.issn.1674-1633.2018.07.009
ArcCHECK结合3DVH在容积旋转调强放疗剂量验证中的应用研究
Application of ArcCHECK Combined with 3DVH in Volumetric Modulated Arc Therapy Dose Verification
摘要
Abstract
Objiective To study the application of ArcCHECK combined with 3DVH in volumetric modulated arc therapy (VMAT) dose verification. Methods Twenty cancer cases were randomly selected, including five nasopharyngeal carcinoma cases, five esophageal cancer and lung cancer cases respectively, and five rectal cancer cases. Double arc VMAT plans were designed with Pinnacle3Version 9.8 treatment planning system (TPS) and transplanted to the ArcCHECK phantom to recalculate the dose. The ArcCHECK phantom was used to measure the beam output, and the gamma passing rate of each patient was evaluated. Then the dose distribution of target and organs at risk were reconstructed by 3DVH software, and the deviation of dose volume parameters were compared with that of TPS. Results The average gamma passing rates of VMAT plans in twenty patients were 98.1%±1.1%. Except for one of the patients with nasopharyngeal carcinoma, the gamma passing rates in the remaining cases were more than 95%. The deviations of D2%, D98%, D50%, Dmeanof PTV were less than 3%. In organs at risk, the Dmaxdeviations of left and right crystal in one nasopharyngeal carcinoma case were 8.63% and 7.01%,respectively. For two rectal cancer cases,the V50deviations of left femoral head and right femoral head were more than 5%, and the dose volume deviations of other cases were less than 5%. Conclusion ArcCHECK combined with 3DVH in VMAT dose verification can provide more dose distribution informations, which help to improve the safety of clinical tumor radiotherapy.关键词
ArcCHECK/3DVH/容积旋转调强放疗/剂量验证/鼻咽癌放疗Key words
ArcCHECK/3DVH/volumetric modulated arc therapy/dosimetric verification/nasopharyngeal carcinoma radiotherapy分类
医药卫生引用本文复制引用
冯瑞兴..ArcCHECK结合3DVH在容积旋转调强放疗剂量验证中的应用研究[J].中国医疗设备,2018,33(7):37-40,47,5.基金项目
青海省科技支撑计划项目(2015-SF-131). （2015-SF-131）
