基于T_2增强背景抑制技术在臂丛神经成像中的应用研究  

Application of Background Signal Suppressing Technique Based on T_2-Shortening Effect of Gadolimium in MR Imaging of Brachial Plexus

作　　者：刘小明[1] 刘定西[1] 孔祥泉[1] 龙茜[1] 柳曦[1] 余建明[1] 

机构地区：[1]华中科技大学同济医学院附属协和医院放射科,武汉430022

出　　处：《临床放射学杂志》2014年第7期1057-1060,共4页Journal of Clinical Radiology

摘　　要：目的探讨基于T2对比剂增强背景抑制(3D-SPACE)采集技术在3.0 T磁共振臂丛神经成像临床应用的可行性。方法对24名志愿者及96例怀疑臂丛神经病变患者行3.0 T常规扫描及3D-SPACE神经成像序列扫描。由2名神经放射专家采用5分法对所获得的图像进行评估,比较常规T2STIR图像与3D-SPACE STIR图像对臂丛神经及病变的显示差异。采用独立样本t检验对各评分及综合评分结果进行统计学分析比较其差异,P≤0.05认为存在显著性统计学差异。结果 3D-SPACE STIR图像与常规2D T2STIR图像比较,其对臂丛神经各解剖段显示评分及综合评分均有显著性统计学差异(P<0.001),且前者明显大于后者。志愿者组3D SPACE图像可接受率(100%)明显高于常规T2STIR(16.7%),患者组中前者的图像可接受率(96%)也明显高于后者(10.4%)。结论相比常规扫描,3.0 T磁共振基于对比增强背景抑制的3D-SPACE采集技术能更好地显示臂丛神经及病变,对临床诊断及治疗有重大指导意义。Objective To investigate the application of 3D-SPACE STIR sequence combined with background signal suppressing technique based on T2 -shortening effect of Gadolimium in MR imaging of brachial plexus with a 3.0 T MR unit. Methods Twenty-four health volunteers （control group） and 96 patients （study group） with clinically-suspected brachial plexus neuropathy were enrolled in this study. All volunteers and patients underwent conventional MRI scanning and 3D- SPACE STIR sequence scanning after Gadolimium was injected. The five-point grading scale was used to separately evaluate the neurography at different anatomic levels with scores （root, interscalene area, costoclavicular space, and axillary level, etc. ） by two radiologists, and the combined score was calculated, which was used as a sum score for each case. The statistical significance was evaluated by using t test, and P≤0.05 was regarded as statistically significant. Results The scores of various anatomic levels and combined scores measured from 3D-SPACE STIR images were better than thosemeasured from routine T2 STIR images （P 〈 0. 001 ）. Nerve visibility of the former was significantly better than that of the latter. The acceptability rate of brachial plexus imaging on 3D-SPACE STIR images （ 100% ） was significantly higher than that on T2 STIR images （ 16.7% ） in the control group, and in the study group the acceptability rate of brachial plexus imaging on 3D-SPACE STIR images （96%） was also much higher than that on T2 STIR images （10.4%）. Conclusion 3D- SPACE STIR acquisition with background signal suppression based on T2-shortening effect of Gadolinium can more clearly display the brachial plexus with a satisfactory visibility than the conventional MR imaging. Therefore, this technique is of great value in guiding clinical diagnosis and treatment of brachial plexus diseases.

关 键 词：3 0 T MRI 磁共振神经成像 臂丛神经 

分 类 号：R445.2[医药卫生—影像医学与核医学]