OPS与CBCT摆位引导技术在食管癌放疗中的临床应用优劣探讨  

Comparison of positioning guidance techniques by optical positioning system and cone beam CT in radiotherapy of esophageal cancer

作　　者：桂龙刚 李军[1] 胡湛[1] 黄慧[1] GUI Long-gang;LI Jun;HU Zhan;HUANG Hui(Radiotherapy Center of Subei People's Hospital,Yangzhou 225001,Jiangsu Province,China)

机构地区：[1]苏北人民医院放疗中心,江苏扬州225001

出　　处：《医疗卫生装备》2020年第6期69-72,共4页Chinese Medical Equipment Journal

摘　　要：目的:比较光学定位系统(optical positioning system,OPS)与锥形束CT(cone beam CT,CBCT)在食管癌放疗中的摆位误差,探讨其临床应用优劣。方法:选取30例食管癌放疗患者,分别采集和比较每例患者在OPS和CBCT摆位引导技术下的摆位误差。将OPS得到的摆位误差设为实验组,将CBCT得到的摆位误差设为对照组。采用SPSS 19.0软件对数据进行统计学分析。结果:在X方向(左右)上,实验组摆位误差为(2.7±0.7)mm,略大于对照组的(2.5±0.3)mm(t=-1.61,P=0.071),2组间差异无统计学意义。而在Y(头脚)及Z(前后)方向上,实验组的摆位误差分别为(2.9±1.1)和(3.9±0.4)mm,均大于对照组的(2.3±1.4)和(3.3±0.7)mm(Z=2.06,P=0.012;t=2.38,P=0.033),2组间差异具有统计学意义。结论:OPS精确性不及CBCT,但具有操作简单、快速和无辐射等优点,将两者有效结合,各取所长,可大大提升摆位效率和摆位精确性,对患者治疗具有重要的积极作用。Objective To compare the positioning errors of OPS(optical positioning system)and cone beam CT(CBCT)in radiotherapy of esophageal cancer to explore the advantages and disadvantages of these two techniques during their clinical application.Methods Thirty patients undergoing esophageal cancer radiotherapy were selected,and the positioning errors of each patient due to OPS and CBCT were collected and compared.The positioning errors obtained by OPS were set as the experimental group and those by CBCT as the control group.SPSS 19.0 software was used for data analysis.Results At X direction(left and right),the positioning error of the experimental group was(2.7±0.7)mm,slightly higher than that of the control group(2.5±0.3)mm(t=-1.61,P=0.071);there was no any significant difference between the two groups.At Y(head and foot)and Z(front and back)directions,the positioning errors of the experimental group were(2.9±1.1)and(3.9±0.4)mm,respectively,which were also higher than those of the control group(2.3±1.4)and(3.3±0.7)mm(Z=2.06,P=0.012;t=2.38,P=0.033);the difference between the two groups was statistically significant.Conclusion OPS is less accurate than CBCT,while it has the advantages of simple operation,fast operation and no radiation.The combination of OPS and CBCT can greatly improve the efficiency and accuracy of positioning,which is of important positive significance for esophageal cancer radiotherapy.[Chinese Medical Equipment Journal,2020,41(6):69-72]

关 键 词：食管癌 放射治疗 光学定位系统 CBCT 摆位误差 

分 类 号：R318[医药卫生—生物医学工程] R811.1[医药卫生—基础医学]