TOMO MVCT在图像引导放射治疗中的应用分析  

Application analysis of TOMO MVCT in image guided radiotherapy

作　　者：黄家文[1] 张梅芳[1] 郑功汇 林晨晖 吴彩霞[1] Huang Jiawen;Zhang Meifang;Zheng Gonghui;Lin Chenhui;Wu Caixia(Cancer Hospital Affiliated to Fujian Medical University,Fujian Provincial Cancer Hospital,Fuzhou,Fujian 350014,China.)

机构地区：[1]福建医科大学教学医院福建省肿瘤医院,福建福州350014

出　　处：《齐齐哈尔医学院学报》2024年第22期2172-2174,共3页Journal of Qiqihar Medical University

基　　金：国家临床重点专科建设项目资助(2021);福建省肿瘤放射与免疫治疗临床医学研究中心(2020Y2012)。

摘　　要：目的探讨螺旋断层放疗(Tomotherapy)时使用不同兆伏级计算机断层扫描(MVCT)参数对放疗精确度的影响,优化图像引导放疗在临床中的应用。方法选择2023年3月—2024年3月在本院接受螺旋断层放疗的154例患者作为研究对象,随机数表法分为对照组(79例)与实验组(75例)两组。对照组头颈部扫描范围10 cm,胸腹部及盆腔扫描范围20 cm;实验组头颈部扫描范围2 cm,胸腹部及盆腔扫描范围5 cm;所有研究对象每日治疗前进行MVCT扫描,观察两组间摆位误差是否存在差别。结果头颈部肿瘤实验组与对照组摆位误差在所有轴向上均无明显差异,且均值相近。胸腹部肿瘤实验组与对照组摆位误差仅在Y轴方向上有显著差别(P<0.01)。X、Z轴方向误差无显著性差别。盆腔肿瘤实验组与对照组摆位误差在所有轴向上摆位误差均无显著性差别。结论图像引导过程中可以适当减少扫描范围,尤其是头颈部及盆腔对放疗摆位误差没有明显影响,可尽量减少扫描范围。Objective To investigate the impact of different megavoltage computed tomography(MVCT)parameters during helical tomotherapy on the accuracy of radiotherapy,and to optimize the clinical application of image-guided radiotherapy.Methods A total of 154 patients who received helical tomotherapy in our hospital from March 2023 to March 2024 were enrolled in this study.They were randomly divided into a control group and an experimental group using the random number table method,with 77 patients in each group.The control group had a head and neck scanning range of 10 cm and a thorax,abdomen,and pelvis scanning range of 20 cm.The experimental group had a head and neck scanning range of 2 cm and a thorax,abdomen,and pelvis scanning range of 5 cm.All subjects underwent MVCT scanning daily before treatment to observe any differences in setup error between the two groups.Results There was no significant difference in the setup error of head and neck tumors between the experimental and control groups in any axis,and the mean values were similar.There was a significant difference in the setup error of chest and abdominal tumors between the experimental and control groups only in the Y-axis(P<0.01).There was no significant difference in the X and Z-axis errors.There were no significant differences in the setup error of pelvic tumors between the experimental and control groups in any axis.Conclusions During the image-guided process,the scanning range can be appropriately reduced,especially for head and neck and pelvic tumors where positioning errors do not significantly impact.The scan range should be minimized as much as possible.

关 键 词：TOMO MVCT 扫描范围 摆位误差 

分 类 号：R730.55[医药卫生—肿瘤]