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

发布时间：2018-02-02 13:57

本文关键词： 放射疗法计算机辅助鼻咽肿瘤摆位误差　出处：《重庆医学》2014年35期 　论文类型：期刊论文

【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(P0.05);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。
[Abstract]:Objective to evaluate the application value of new image-guided radiotherapy system (XGS) in intensity modulated radiotherapy of nasopharyngeal carcinoma (NPC) in Chongqing Weidu Medical equipment Co., Ltd. Methods Varian accelerator was used in the hospital. Thirty patients with nasopharyngeal carcinoma received intensity modulated radiotherapy. The image guided radiotherapy system (XGS) and the Varian21EX accelerator (CBCT), which are produced by Chongqing Weidu Medical equipment Co., Ltd., are used to obtain the positive and side images, respectively; and. Ct images. By matching the obtained image with the planned image and its target center, the positioning errors in the direction of the left and right side of the target center, the head and foot yam, and the back of the chest are obtained, and the image acquisition time and matching time are recorded. The results show that the correlation of the two systems in three directions is good, and the difference is within the acceptable range. The difference was not statistically significant (P 0.05). The average time of image acquisition by XGS system was 15 卤2s, and the total time of image acquisition and matching was 20 卤2s. The average time of image acquisition by CBCT system was 120 卤8s. The total time of collecting and matching images was 240 卤10 s. Conclusion the results of the domestic XGS system in the intensity modulated radiotherapy of nasopharyngeal carcinoma patients are similar to those of the CBCT system. The image acquisition time and matching time of XGS system are shorter than that of CBCT, which can shorten the localization time, reduce the radiation dose of patients exposed to radiation, and benefit to the guidance of intensity modulated radiotherapy in clinic.
【作者单位】：重庆医科大学附属第一医院肿瘤科;
【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)
【分类号】：R739.63
【正文快照】： 精确放射治疗是目前主要的放射治疗技术,亦是鼻咽癌的首选,它要求做到肿瘤的精确定位、精确设计和精确执行。但是,受放射治疗中出现的各种摆位误差的影响,以及治疗过程中解剖结构的改变,很难达到真正意义上的精确执行[1-2]。近年来,随着图像引导放射治疗技术的迅速发展,在线校

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