3DT_1WI/TFE序列在肝硬化增生结节诊断中的应用

Application of 3D T_1WI/TFE sequence in hepatic cirrhosis nodules

目的 :探讨MRI中三维T1加权成像梯度回波 (3DT1WI/TFE)序列在肝硬化结节诊断中的价值。方法 :对临床疑肝硬化和 /或经CT及超声检查后诊断为肝硬化 33例进行MRI 3DT1WI/TFE序列扫描检查 ,分析肝硬化结节在该序列中的特点。结果 :33例中 ,无增生结节的肝硬化 7例 ,肝硬化合并增生结节 6例 ,肝硬化并肝癌 2 0例。肝硬化结节在 3DT1WI/TFE上呈高信号 ,在T2 WI上呈低信号 ,在静脉动态增强中肝硬化结节与正常肝实质同步强化。而肝硬化并肝癌在3DT1WI/TFE上呈低信号 ,在T2 WI上呈高信号 ,在静脉动态增强中表现为“快进快出”的特性。结论 :MRI中 3DT1WI/TFE序列在肝硬化检查中 ,能很好的显示肝内增生结节 ,并且可与结节性肝癌进行鉴别。图像质量高 ,能够满足临床的诊断需要。

Objective:To study the 3D T 1WI/TFE sequence of MRI applied in the diagnoses of hepatic cirrhosis nodules.Methods:33 cases with or suspected hepatic cirrhosis nodules diagnosed by CT and ultrasonic technique were undergone MRI 3D T 1WI/TFE sequence,and the image feature were analysed.Results:There were 7 cases only with hepatic cirrhosis,6 cases with hepatic cirrhosis nodules,and 20 cases with hepatic cirrhosis and cancer. The nodules displayed high signal on 3D T 1WI/TFE and low signal on T 2WI,and showed synchronous enhancenment with normal hepatic parenchyma. But hepatic cancer displayed low signal on 3D T 1WI/TFE and high signal on T 2WI,and showed the character of “fast in and fast out” on Gd DTPA enhanced scans.Conclusion:The 3D T 1WI/TFE sequence of MRI applied in hepatic cirrhosis examination could cleary reveal the hepatic cirrhosis nodules and differentiate the nodules from nodulated hepatic cancer.The high quality of images satisfied the clinical use.