医疗卫生装备2011，Vol.32Issue(11)：90-91,2.
兆伏级锥形束CT在头颈部肿瘤放疗摆位中的应用
Application of MV Grade Cone-beam CT in Positioning of Head and Neck Cancer Radiotherapy
摘要
Abstract
Objective To investigate set-up errors in intensity modulated radiotherapy for head and neck cancer by using linear-accelerator-loaded MV grade cone-beam CT scanning technique. Methods Patients accepted intensity modulated radiotherapy for head and neck cancer were scanned by MV cone-beam CT before the first radiotherapy and once a week afterward. The offsets of the scanogram from the target centre of treatment planning in right-left ,anterior-posterior and superior-interferior directions were recorded, then the accuracy of positioning was judged. Results There were 535 times of scanning of MV CBGT for all 101 patients of the head and neck cancer, and the average error was right-left( 1.04 ±0.51) mm, anterior-posterior(1.81 ± 0.79) mm, superior-interferior (1.93 ± 0.95) mm. Conclusion Using of the MV grade conebeam CT scan can detect and correct set-up errors accurately and rapidly, thereby it can ameliorate and advance the accuracy of positioning, with which doctors can sketching the opening margin of the target volume in accordance.关键词
兆伏级锥形束CT/摆位误差/调强放疗/计划靶区Key words
MV grade cone-beam CT/ set-up error/ intensity-modulated radiotherapy/ planning target volume分类
医药卫生引用本文复制引用
闫晓梅,聂青,徐云科..兆伏级锥形束CT在头颈部肿瘤放疗摆位中的应用[J].医疗卫生装备,2011,32(11):90-91,2.
