国产图像引导放射治疗系统XGS在鼻咽癌调强放射治疗中的临床应用  

Clinical research of domestic image-guided radiotherapy system XGS-10 on intensity modulated radiotherapy of nasopharyngeal carcinoma

作　　者：廖奎[1] 陈华万[1] 梁廷[1] 王志令[1] 王志海[1] 陈晓品[1] 

机构地区：[1]重庆医科大学附属第一医院肿瘤科,400016

出　　处：《重庆医学》2014年第35期4771-4773,共3页Chongqing medicine

基　　金：重庆市科委科技攻关项目(cstc2011ac5191);重庆市科委集成示范项目(cstc2013jcsf10007)

摘　　要：目的评价重庆伟渡医疗设备股份有限公司的新型图像引导放射治疗系统XGS在鼻咽癌调强放射治疗中的应用价值。方法选取在该院运用Varian加速器实行调强放射治疗的30例鼻咽癌患者,采用重庆伟渡医疗设备股份有限公司生产的图像引导放射治疗系统XGS和Varian21EX加速器的图像引导放射治疗系统CBCT分别获取正侧图像及CT图像,将获取的图像与计划图像及其靶中心匹配,得出靶中心左右(X)、头脚(Y)、胸背(Z)方向的摆位误差并记录图像采集时间及匹配时间,比较两种系统检测摆位误差及图像采集时间与匹配时间。结果两种系统在X、Y、Z 3个方向的摆位误差相关性均较好,差值均在可接受范围内,差异无统计学意义(P>0.05);XGS系统获取图像平均时间(15±2)s,采集及匹配图像总时间(20±2)s;CBCT系统获取图像平均时间(120±8)s,采集及匹配图像总时间为(240±10)s。结论国产XGS系统在鼻咽癌患者调强放射治疗时检测的摆位误差与CBCT系统的结果相当,而XGS系统的图像采集时间及匹配时间均较CBCT短,可缩短定位时间,减少患者接触射线的辐射剂量,有利于临床进行调强放射治疗引导。Objective To evaluate the application value of domestic image-guided radiotherapy system XGS-10 made in Weidu medical company limited in intensity-modulated radiotherapy for nasopharyngeal carcinoma.Methods A total of 30 nasopharyngeal carcinoma cases with intensity modulated radiatiotherapy by Varian accelerator were incorporated into the study.All patients accepted image-guided radiotherapy system XGS-10 of Chongqing Weidu medical company limited to obtain frontal images and CBCT to obtain CT images respectively.The images were matched with the planning images and target center,then got the linear set-up errors of left to right（X）,superior to inferior（Y）,and anterior to posterior（Z）,and the time of acquiring and matching was recorded.Results The correlation of both two instruments′setup errors in X,Y,Z direction is good,the difference of setup errors was within the acceptable range,and was not statistically significant（P〉0.05）.the time of acquiring images was（15±2）s and that of matching images was（20±2）s by XGS-10;the time of acquiring images was（120±8）s and that of matching images was（240±10）s by Varian CBCT.Conclusion The setup error of XGS-10 of intensity-modulated radiotherapy for nasopharyngeal carcinoma was equal to CBCT,but the time of acquiring and matching time of XGS-10 was shorter than that of CBCT,which could shorten the positioning time and reduce radiation dose for patient.As a result,it is conducive to real-time clinical radiotherapy guidance.

关 键 词：放射疗法 计算机辅助 鼻咽肿瘤 摆位误差 

分 类 号：R739.63[医药卫生—肿瘤]