磁共振波谱成像在轻微型肝性脑病诊断中的应用

目的评价3T磁共振1H-MRS（1H-magnetic resonance spect-roscopy）在轻微型肝性脑病（minimal hepatic en-cephalopathy,MHE）诊断中的应用。方法对25例轻微型肝性脑病患者和28例无轻微型肝性脑病的肝硬化患者采用单体素氢质子波谱-激励回波采集（stimulated echo acquisition mode spectroscopy,STEAM）序列进行左侧基底节区的MRS扫描。计算N-乙酰天门冬氨酸（NAA）、肌酸（Cr）、胆碱（Cho）、肌醇（mI）和谷氨酰胺复合物（Glx）的峰下面积,计算NAA/Cr、Cho/Cr、mI/Cr、Glx/Cr,并与22例健康体检者（正常对照组）比较。结果与正常对照组相比,MHE患者左侧基底节区的Glx/Cr比值显著升高,Cho/Cr、mI/Cr显著降低（P〈0.05）;与无MHE的肝硬化患者相比,MHE患者左侧基底节区的Glx/Cr与Cho/Cr有显著性差异（P〈0.05）;无MHE的肝硬化患者与正常对照组比较mI/Cr有显著性差异（P〈0.05）。结论 3 T场强磁共振MRS检查显示MHE患者基底节区的Cho、mI水平降低,Glx水平升高,3T场强磁共振MRS对MHE的诊断有一定价值。

Application of proton magnetic resonance spectroscopy in diagnosis of Hepatic encephalopathy

Objective To assess the value of 3T proton magnetic resonance spectroscopy(MRS) in diagnosis of minimal hepatic encephalopathy(MHE).Methods MRS(basal ganglia) was performed using stimulated echo acquisition mode spectroscopy(STEAM) sequences in 25 with MHE and 28 without and 22 controls.Peak area of each metabolite,including NAA,Cr,Cho,mI,Glx and their ratios to Cr were computed,then compared with the controls.Results Compared with the controls,the patients with MHE showed significantly increased Glx/Cr and...