有无CT端光学定位设备对光学表面引导的左侧乳腺癌DIBH放疗摆位精度影响的研究  

Study of Effects on Setup Accuracy of Optical Surface-Guided DIBH Radiotherapy for Left Breast Cancer Patients Positioned with and Without CT-Side Optical Equipment

作　　者：吴何苟 钟鹤立 张光伟 刘剑锋 杨俊国 苏小慧 WU Hegou;ZHONG Heli;ZHANG Guangwei;LIU Jianfeng;YANG Junguo;SU Xiaohui(Department of Radiation Oncology,Shenzhen People’s Hospital(The Second Clinical Medical College of Ji’nan University,The First Affiliated Hospital of Southern University of Science and Technology),Shenzhen Guangdong 518020,China)

机构地区：[1]深圳市人民医院(暨南大学第二临床医学院,南方科技大学第一附属医院)肿瘤放疗科,广东深圳518020

出　　处：《中国医疗设备》2023年第1期48-52,共5页China Medical Devices

基　　金：国家自然科学基金(61871374)。

摘　　要：目的探讨光学表面引导左侧乳腺癌深吸气屏气(Deep Inspiration Breath-hold,DIBH)放疗过程中,无CT端光学设备定位与有CT端光学设备辅助定位2种模式对放疗摆位精度的影响。方法选取60例左侧乳腺癌患者,其中30例患者行无CT端光学设备DIBH定位后,通过光学表面监测系统OSMS(AlignRT)引导实施DIBH放疗(D0组);其他30例患者通过CT端光学设备Sentinel辅助DIBH定位后,通过Catalyst引导实施DIBH放疗(D1组)。比较2组定位流程,并分析2组患者首次放疗摆位时经CBCT配准后六维方向的误差数据。结果D0组在x、y、z和Rx、Ry、Rz六维方向的CBCT配准误差绝对值分别为(0.15±0.11)、(0.17±0.12)、(0.20±0.14)cm和(0.77±0.71)°、(0.60±0.60)°、(0.66±0.62)°,D1组为(0.13±0.08)、(0.13±0.09)、(0.20±0.11)cm和(0.61±0.57)°、(0.50±0.52)°、(0.61±0.46)°,2组配准数据比较差异均无统计学意义(P>0.05)。结论无CT端光学设备与有CT端光学设备定位,均可精准实现光学表面引导的左侧乳腺癌DIBH放疗摆位,两者CBCT配准误差无统计学差异。Objective To investigate the efect of positioning without CT end optical device and positioning with CT end optical device on the precision of radiotherapy placement during optical surface-guided deep inspiration breath-hold(DIBH)radiotherapy on left breast cancer.Methods A total of 60 patients diagnosed with left breast cancer were selected,30 of them were guided to implement DIBH radiotherapy(group D0)through the optical surface monitoring system OSMS(AlignRT)after the positioning of DIBH without CT-side optical equipment;the other 30 patients were treated with Catalyst guided DIBH radiotherapy(group D1)after the location of DIBH was assisted by the Sentinel CT-side optical device.The positioning procedures of the two groups were compared,and the error data of six dimensions after CBCT registration in the first radiotherapy position of the two groups were analyzed.Results The absolute values of CBCT registration errors in x,y,z and Rx,Ry and Rz directions were(0.15±0.11),(0.17±0.12),(0.20±0.14)cm and(0.77±0.71)°,(0.60±0.60)°and(0.66±0.62)°,respectively.Group D1 was(0.13±0.08),(0.13±0.09),(0.20±0.11)cm,(0.61±0.57)°,(0.50±0.52)°,(0.61±0.46)°,respectively,and there was no significant diference in registration data between the two groups(P>0.05).Conclusion Positioning of left breast cancer DIBH radiotherapy guided by optical surface can be achieved accurately without CT-side optical device or with CT-side optical device,and there was no statistically significant diference in CBCT registration error between the two methods.

关 键 词：CT端光学设备 乳腺癌 光学表面引导 深吸气屏气 放射治疗 

分 类 号：R811.1[医药卫生—放射医学]