光学表面监测系统辅助摆位功能在特殊体位患者上的应用  

Application of Optical Surface Monitoring System-Assisted Positioning on Patients in Special Positions

作　　者：应微[1] 黎杰[1] 高绪峰[1] 王先良[1] 吴德全[1] 梁黎[1] 廖雄飞[1] Ying Wei;Li Jie;Gao Xufeng;Wang Xianliang;Wu Dequan;Liang Li;Liao Xiongfei(Department of Radiotherapy,Sichuan Clinical Research Center for Cancer,Sichuan Cancer Hospital&Institute,Sichuan Cancer Center,Affliated Cancer Hospital of University of Electronic Science and Technology of China,Chengdu 610041,Sichuan,China)

机构地区：[1]四川省肿瘤临床医学研究中心,四川省肿瘤医院·研究所,四川省癌症防治中心,电子科技大学附属肿瘤医院放疗科,成都610041

出　　处：《肿瘤预防与治疗》2024年第10期893-897,共5页Journal of Cancer Control And Treatment

摘　　要：目的:探讨放射治疗摆位过程中光学表面监测系统(optical surface monitoring system,OSMS)自动摆位功能与传统体表标记摆位在特殊体位患者摆位精度和时间上的差异。方法:选取20例适合特殊体位放疗的患者,将其随机分为A、B两组,每组10例,A组使用光学表面监测系统自动摆位功能进行摆位,B组使用传统体表标记进行摆位,摆位后分别进行锥体束CT扫描,对获得的扫描图像与计划参考图像进行配准,并得到左右方向(left-right,LR)、头脚方向(superior-inferior,SI)、前后方向(anterior-post,AP)3组平移误差和绕左右方向(Roll-LR)、绕头脚方向(Roll-SI)、绕前后方向(Roll-AP)3组旋转误差。校正摆位误差并实施治疗,在治疗完成后记录下两组患者所用的摆位时间。结果:A组患者配准后LR、SI、AP方向的平移误差和Roll-LR、Roll-SI、Roll-AP方向的旋转误差分别为(0.15±0.07)cm、(0.14±0.04)cm、(0.15±0.05)cm和0.38°±0.14°、0.57°±0.10°、0.55°±0.11°;B组患者配准后LR、SI、AP方向平移的误差和Roll-LR、Roll-SI、Roll-AP方向的旋转误差分别为(0.17±0.04)cm、(0.31±0.07)cm、(0.33±0.09)cm和0.42°±0.15°、0.86°±0.11°、0.81°±0.11°;两两比较其差异,两种摆位方式在y、z、Ry、Rz方向的误差差异有统计学意义(P<0.01),在x、Rx方向的误差差异无统计学意义(P>0.05);A组摆位时间为(135±32)s,B组为(230±40)s,结果差异有统计学意义(P<0.01)。结论:特殊体位放疗患者利用OSMS自动摆位功能可有效提高摆位精度,减少摆位时间,提高工作效率。Objective:To explore the comparison of the accuracy and time between the automatic positioning of optical surface monitoring system(OSMS)and the traditional surface mark positioning in patients with special positions.Methods:Twenty radiotherapy patients in special positions were randomly selected.They were divided into two groups(A and B),10 cases in each group.Automatic setup guided by OSMS was used in group A(the OSMS group);traditional surface markers were used in positioning in group B(the surface mark group).Cone-beam CT(CBCT)scan was performed after setup.Scanned pictures were matched with the plan reference images.Translational errors in left-right(LR),superior-inferior(SI),anterior-posterior(AP)directions and the rotation errors in Roll-LR,Roll-SI,Roll-AP directions were obtained.The setup errors were corrected before implementing the treatment.Positioning time in two groups were recorded before ending the treatment.Results:The errors in group A were(0.15±0.07)cm,(0.14±0.04)cm and(0.15±0.05)cm in LR,SI and AP directions,0.38°±0.14°,0.57°±0.10°and 0.55°±0.11°in Roll-LR,Roll-SI and Roll-AP directions.The errors in group B were(0.17±0.04)cm,(0.31±0.07)cm and(0.33±0.09)cm in LR,SI and AP directions,0.42°±0.15°,0.86°±0.11°and 0.81°±0.11°in Roll-LR,Roll-SI and Roll-AP directions.The differences between the two setup methods were statistically significant in y,z,Ry and Rz directions(all P<0.01).The differences between them were not statistically significant in x and Rx directions(all P>0.05).The setup time in group A was(135±32)s,in group B was(230±40)s,the difference between the two was statistically significant(P<0.01).Conclusion:OSMS-assisted automatic positioning can effectively improve the positioning accuracy,reduce the positioning time and improve work efficiency for radiotherapy patients in special positions.

关 键 词：光学表面监测系统(OSMS) 自动摆位 体表标记 特殊体位 摆位误差 

分 类 号：R730.55[医药卫生—肿瘤]