研究和对比三种图像自动配准技术在头颈部肿瘤放射治疗摆位偏移检测中的应用价值  

Study and Compare the Application Value of Three Image Automatic Registration Techniques in Detecting Positioning Deviation in Radiotherapy for Head and Neck Tumors

作　　者：利奇志 许章顶 LI Qi-zhi;XU Zhang-ding(Yangjiang People’s Hospital,Guangdong Yangjiang 529500)

机构地区：[1]阳江市人民医院,广东阳江529500

出　　处：《中国医疗器械信息》2024年第15期86-88,共3页China Medical Device Information

摘　　要：目的:对比和分析在头颈部肿瘤放射治疗摆位偏移检测中应用三种图像自动配准技术的价值。方法:选取头颈部肿瘤患者21例,放射治疗前模拟定位并制定放疗计划、检测摆位偏移并实施图像配准,比较千伏级数字X射线摄影(KVDR)、锥形束电子计算机断层扫描(CBCT)及电子射野影像装置(EPID)在3mm、5mm、7mm、9mm及12mm各摆位偏移上的配准误差及配准时间。结果:KVDR、CBCT及EPID在3mm、5mm、7mm、9mm及12mm各摆位偏移上的配准误差差异均有统计学意义(P<0.05),与KVDR及EPID相比,CBCT的配准精度最差,差异有统计学意义(P<0.05)。KVDR、CBCT及EPID配准时间差异均有统计学意义,EPID配准效率最高,其次为KVDR及CBCT(P<0.05)。结论:EPID图像引导放射治疗定位系统在摆位偏移检测中的配准效率最高,配准精度略低于KVDR。Objective:To compare and analyze the value of applying three image automatic registration techniques in detecting positioning deviation in radiotherapy for head and neck tumors.Methods:21 patients with head and neck tumors were selected to simulate localization and develop a radiotherapy plan before radiotherapy,detect positioning offsets,and perform image registration.The registration errors and registration times of kilovolt level digital X-ray radiography(KVDR),cone beam computed tomography(CBCT),and Electronic Field Imaging Device(EPID)were compared on 3mm,5mm,7mm,9mm and 12mm positioning offsets.Results:The registration error differences of KVDR,CBCT,and EPID at 3mm,5mm,7mm,9mm and 12mm positioning offsets were statistically significant(P<0.05).Compared with KVDR and EPID,CBCT had the worst registration accuracy and the difference was statistically significant(P<0.05).The difference in registration time among KVDR,CBCT,and EPID was statistically significant,with EPID having the highest registration efficiency,followed by KVDR and CBCT(P<0.05).Conclusion:The EPID image guided radiotherapy positioning system has the highest registration efficiency in positioning deviation detection,and the registration accuracy is slightly lower than KVDR.

关 键 词：头颈部肿瘤 图像自动配准技术 放射治疗 摆位偏移检测 配准精度 

分 类 号：R739.91[医药卫生—肿瘤]