搜索

臂叢神經(jīng)磁共振成像技術(shù)初步研究

摘要:目的: 探討臂叢神經(jīng)磁共振成像的技術(shù)方法及其可行性。 方法 :對15例正常志愿者行雙側(cè)臂叢神經(jīng)成像:包括常規(guī)快速自旋回波序列T1加權(quán)(T1W/TSE)、快速自旋回波序列T2加權(quán)(T2W/TSE)、快速自旋回波序列T2加權(quán)加SPIR脂肪抑制(T2W/SPIR)冠狀位掃描以及彌散加權(quán)背景抑制成像序列(DWIBS)軸位掃描。 結(jié)果 :T1W/TSE、T2W/TSE、及T2W/SPIR對臂叢節(jié)后神經(jīng)同層顯示率分別為533%、567%和833%;DWIBS MIP重建圖像對臂叢神經(jīng)的全貌顯示較為完整、清晰、直觀;T1W/TSE、T2W/TSE、T2W/SPIR及DWIBS MIP重建圖像的對比噪聲比分別為109±09、107±13、185±68和299±133,T2W/SPIR序列和DWIBS MIP重建圖像的對比噪聲比明顯高于T1W/TSE和T2W/TSE序列。 結(jié)論 :T2W/SPIR序列對臂叢神經(jīng)的同層顯示率及圖像的對比噪聲比明顯高于常規(guī)T1W/TSE、T2W/TSE序列, DWIBS MIP重建圖像能夠顯示臂叢神經(jīng)的全貌,兩者為臂叢神經(jīng)成像較為有效的技術(shù)方法,對于臂叢神經(jīng)病變的診斷即具有十分重要的意義。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.