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Evaluation of Brachial Plexus with MRI

摘要:目的: 探讨臂丛神经磁共振成像的技术方法及其可行性。 方法 :对15例正常志愿者行双侧臂丛神经成像:包括常规快速自旋回波序列T1加权(T1W/TSE)、快速自旋回波序列T2加权(T2W/TSE)、快速自旋回波序列T2加权加SPIR脂肪抑制(T2W/SPIR)冠状位扫描以及弥散加权背景抑制成像序列(DWIBS)轴位扫描。 结果 :T1W/TSE、T2W/TSE、及T2W/SPIR对臂丛节后神经同层显示率分别为533%、567%和833%;DWIBS MIP重建图像对臂丛神经的全貌显示较为完整、清晰、直观;T1W/TSE、T2W/TSE、T2W/SPIR及DWIBS MIP重建图像的对比噪声比分别为109±09、107±13、185±68和299±133,T2W/SPIR序列和DWIBS MIP重建图像的对比噪声比明显高于T1W/TSE和T2W/TSE序列。 结论 :T2W/SPIR序列对臂丛神经的同层显示率及图像的对比噪声比明显高于常规T1W/TSE、T2W/TSE序列, DWIBS MIP重建图像能够显示臂丛神经的全貌,两者为臂丛神经成像较为有效的技术方法,对于臂丛神经病变的诊断即具有十分重要的意义。Abstract: Objective: To determine the optimal sequences of brachial plexus with MRI. Methods : Fifteen volunteers were underwent MRI on 15T scanner, the Sequences of T1W/TSE/COR, T2W/TSE/COR, T2W/SPIR/COR and Diffusionweighted imaging with background body signal suppression were performed. Results : The display rates of brachial plexus postganglionic segment nerve showing at the same slice were 533%, 567% and 833% on T1W/TSE/COR, T2W/TSE/COR, T2W/SPIR/COR. Brachial plexus on DWIBS MIP were clear and complete. Contrastnoise ratio of four sequences was 109±09, 107±13, 185±68 and 299±133,respectively. Contrastnoise ratio of T2W/SPIR/COR and DWIBS MIP was significantly higher than that of the other two sequences. Conclusion : Display rate of brachial plexus and contrastnoise ratio of images on T2W/SPIR/COR were higher than those of routine sequences. Image of DWIBS MIP can show the outline of brachial plexus clearly. The two sequences were reliable and effetive techoniquic in diagnosis of brachial plexus lesion.