核磁共振对肝硬化肝内结节的诊断价值  

Evaluation of Nodule in Liver Cirrhosis with MRI

作　　者：蔡磊[1] 郭玉林[1] 侯登华[1] 朱力[1] 李宁福[1] 龚瑞[1] 赵建国[1] 

机构地区：[1]宁夏医科大学附属医院放射科,银川750004

出　　处：《宁夏医科大学学报》2010年第5期583-584,588,F0002,共4页Journal of Ningxia Medical University

基　　金：宁夏医科大学2006年面上项目

摘　　要：目的总结肝硬化再生结节(RN)、肝不典型增生结节(DN)和小肝癌结节的核磁共振表现并探讨核磁共振(MR)诊断价值。方法回顾分析60例结节性肝硬化病例(合并DN 7个,肝癌结节16个)MR检查资料,患者行脂肪抑制的T1WI、T2WI、正反相位T1WI及动态增强扫描和弥散加权(DWI)扫描,总结肝内结节的信号特点。结果在常规脂肪抑制下肝硬化结节T1WI多为等信号或稍高信号,T2WI多为低信号,增强后与周围正常肝组织强化相似或信号稍低;DN在T1WI多为较高信号,T2WI多为稍低或等信号,增强后强化不明显;癌结节T1WI多为稍低或等信号,偶有稍高信号,T2WI多为较高信号,DWI为高信号,强化多为动脉中晚期强化,门静脉期以后强化减退。结论核磁共振可以对大多数RN、DN和小肝癌结节明确诊断和鉴别。Objective To investigate the diagnosis value of regenerative nodules（RN）,dysplastic nodules（DN） and hepatocellular carcinoma（HCC） with MRI.Methods 60 patients with cirrhotic nodular were retrospectively reviewed（with 7 dysplastic nodules,16 hepatocellular carcinoma）.Routine MR T1WI,T2WI,3Ddynami enhance MR and diffusion weighted image（DWI） were obtained.The characteristics of nodule in liver cirrhosis were analyzed.Results Most of regenerative nodules were isointense or slightly hyperintense on T1WI and hypointense on fat saturated T2WI.It were isointensity or slightly hypointense compared with surrounding hepatial parenchyma.Dysplastic nodules were hyperintense on T1WI and isointensity or slightly hypointense on T2WI.Hepatocellular carcinomas were isointensity or slightly hypointense on T1WI and hyperintense on both T2WI and DWI.Enhancement was obviously during arterial phase and decreased during the portal phase on enhanced scans.Conclusion MRI is helpful in diagnosis and differentiation of nodule in liver cirrhosis.

关 键 词：癌 肝硬化 再生结节 磁共振成像 

分 类 号：R445.2[医药卫生—影像医学与核医学]