光学体表成像辅助摆位对保乳调强放射治疗摆位精度的影响  

The Influence of Optical Body Surface Imaging on the Auxiliary Positioning Function and Positioning Accuracy in Breast Conserving Intensity Modulated Radiation Therapy

作　　者：刘军 Liu Jun(Ganzhou People's Hospital,Ganzhou Jiangxi 341000,China)

机构地区：[1]赣州市人民医院,江西赣州341000

出　　处：《医疗装备》2024年第10期27-30,共4页Medical Equipment

摘　　要：目的分析保乳调强放射治疗中应用光学体表成像辅助摆位对摆位精度的影响。方法选取2021年1月至2023年7月于医院接受调强放射治疗的40例乳腺癌患者为研究对象。所有患者每次接受调强放射治疗前均采用体表标记线辅助摆位,并通过光学体表成像进行辅助摆位校正,然后通过锥形束CT验证摆位效果。根据光学体表成像监测患者双侧及单患侧感兴趣区域(ROI),记录根据标记线摆位后、光学体表成像校正后的治疗床床值及锥形束CT验证后的体位误差数据。结果光学体表成像在左右(LR)、腹背(AP)、头脚(SI)方向的摆位误差均少于体表标记线(P<0.05)。而相较于双侧ROI,单患侧ROI在Roll方向及AP方向上的误差更大(P<0.05);而单患侧ROI与双侧ROI在LR、SI、Pitch、Rtn方向的误差比较,差异无统计学意义(P>0.05)。结论光学体表成像辅助摆位能提高乳腺癌保乳术后患者的调强放射治疗摆位精度,且双侧ROI摆位精度更高。Objective To analyze the effect of optical surface imaging on the auxiliary positioning function and positioning accuracy in breast conserving intensity modulated radiation therapy.Methods With the selection of forty patients with breast cancer receiving IMRT in hospital from January 2021 to July 2023 as subjects,before each intensity modulated radiation therapy,the patient positioning was performed according to the marked line on the body surface,and auxiliary correction of positioning was performed by optical body surface detection system.Then,the positioning effect was verified through cone beam CT,and the bilateral and unilateral region of interest(ROI)of the patient were monitored based on the optical body surface.The treatment couch bed value corrected by the optical body surface detection system after positioning according to the marking line,and the body position error data verified by cone beam CT were recorded.Results The positioning errors of optical body surface imaging in the left and right(LR),anterior and posterior(AP),and superior-inferior(SI)directions were all less than the body surface marking lines(P<0.05).Compared to bilateral ROI,unilateral ROI has a greater error in the Roll and AP directions(P<0.05);However,there was no significant difference in the errors of LR,SI,Pitch,and Rtn directions between the unilateral ROI and the bilateral ROI(P>0.05).Conclusion Optical body surface imaging can improve the positioning accuracy of intensity modulated radiation therapy for breast cancer patients after breast conserving surgery,and bilateral ROI positioning accuracy is higher.

关 键 词：光学体表成像 保乳术 调强放射治疗 辅助摆位 摆位精度 

分 类 号：R815.6[医药卫生—放射医学]