T1WI_Star_VIBE_FS序列在头颈部放疗MR定位中扫描方法研究  

Study of scanning method of T1WI_Star_VIBE_FS in MRI simulation of neck radiotherapy

作　　者：刘巍巍[1] 黎田 胡俏俏 赵丹[1] 张扬子 岳海振[1] Liu Weiwei;Li Tian;Hu Qiaoqiao;Zhao Dan;Zhang Yangzi;Yue Haizhen(Key Laboratory of Carcinogenesis and Translational Research(Ministry of Education/Beijing),Department of Radiation Oncology,Peking University Cancer Hospital&Institute,Beijing 100142,China)

机构地区：[1]北京大学肿瘤医院暨北京市肿瘤防治研究所放疗科,恶性肿瘤发病机制及转化研究教育部重点实验室,100142

出　　处：《中华放射肿瘤学杂志》2021年第7期692-696,共5页Chinese Journal of Radiation Oncology

基　　金：北京市自然科学基金(1202009);北京市属医院科研培育计划项目(PX2019042)。

摘　　要：目的对比分析T1WI_Star_VIBE_FS序列在头颈部肿瘤患者MR定位中不同扫描方式对图像质量、信噪比、对比噪声比等参数的影响,确定优选扫描方式。方法回顾性分析78例头颈部MR定位患者,分别采用组织补偿法(A组23例)、分段扫描拼接法(B组18例)和二者结合法(C组37例)进行增强扫描,对比上述3种扫描方式获取的图像质量、颈前部软组织信噪比(SNR)和对比噪声比(CNR)的差异。结果C组扫描方式可获取较高的图像质量评分;3种扫描方式获取图像的SNR的平均值分别为214.70±148.78、91.95±59.26、307.61±127.80;CNR的平均值分别为208.74±148.27、85.79±59.50、301.58±127.48;C组在图像质量评分、SNR和CNR方面均明显优于A、B组(P<0.01)。结论推荐使用组织补偿和分段拼接扫描相结合方式作为头颈部肿瘤放疗MR定位的优选扫描方式。Objective To compare and analyze the image quality,signal-to-noise ratio(SNR)and contrast-to-noise ratio(CNR)of T1WI_Star_VIBE_FS sequence in MRI simulation of neck tumors with different scanning methods,aiming to determine the optimal scanning method.Methods A retrospective analysis of 78 patients receiving MRI contrast scan was performed.All patients were randomly divided into three groups according to three different scanning methods including bolus mode(group A,n=23),segmentation splicing mode(group B,n=18)and the combination mode(group C,n=37).The image quality,SNR and CNR of the anterior soft tissues of neck were statistically compared.Results A higher image quality score was obtained in group C.The mean SNR and CNR in three groups were calculated as 214.70±148.78,91.95±59.26,307.61±127.80,and 208.74±148.27,85.79±59.50,301.58±127.48,respectively.The image quality score,SNR and CNR in group C were significantly better compared with those in group A and B(all P<0.01).Conclusion Combination of bolus and segmentation splicing modes is a recommended approach in MRI simulation during radiotherapy of neck tumors.

关 键 词：磁共振定位 头颈部肿瘤 信噪比 

分 类 号：R730.55[医药卫生—肿瘤] R445.2[医药卫生—临床医学]