医疗卫生装备2017，Vol.38Issue(11)：69-71,78,4.DOI:10.7687/j.issn1003-8868.2017.11.069
肺癌影像引导放疗摆位误差及配准的对比研究
Comparative research of setup error and registration for image-guided radiotherapy of lung cancer
摘要
Abstract
Objective To explore the setup error and area registration error during lung cancer radiotherapy by using the on board imager (OBI) of the linear accelerator. Methods Totally 50 lung cancer patients underwent image-guided radiation therapy. Then OBI system was used for the scan validation by electronic portal imaging device (EPID) and cone beam CT (CBCT), and comparative analysis was executed on the setup errors of EPID and CBCT. Results The translation errors of EPID were (-1.62 ±1.58), (2.12 ±1.49) and (4.52 ±2.42)mm respectively at Lat, Vrt and Lng directions, while those of CBCT were (-1.27±1.25), (1.43±1.57) and (3.12±2.62) mm respectively. The registration errors at Lat, Vrt and Lng directions and rotation angle of lung tissue were (-1.27±1.25), (1.43±1.57), (3.12±2.62)mm and (0.5±1.6)° respectively, and those of target area were (-1.56±1.78), (1.68±2.39), (3.42±2.73)mm and (0.8±1.9)° respectively. CBCT and EPID had statistical differences (P<0.05) in setup error validation as well as setup errors at Vrt and Lng directions. There were no significant differences (P>0.05) when CBCT self-registration was involved in selecting different areas. Conclusion CBCT and EPID can both used for the setup validation of lung cancer, while the former behaved better than the latter.关键词
OBI影像引导系统/肺癌/锥形束/摆位误差/治疗精度Key words
OBI image-guided system/lung cancer/cone beam/setup error/precision of treatment分类
医药卫生引用本文复制引用
孙小喆,孟慧鹏,郑爱青,王昊,孙劲松,梁克明,穆海玉..肺癌影像引导放疗摆位误差及配准的对比研究[J].医疗卫生装备,2017,38(11):69-71,78,4.基金项目
武警后勤学院附属医院种子基金项目(FYQ201608,F YM201620) （FYQ201608,F YM201620）
