原发性肝癌的MRI诊断价值

目的探讨原发性肝癌的MR I特征及诊断价值。方法回顾性对174例MR I诊断为肝癌的病例的信号、假包膜、瘤外征象的特点及它们与分型的关系进行分析,并对手术病理组MR I诊断准确率及误诊加以分析。结果所有肝癌在T2W I都具有稍高信号的特点,而T1W I以稍低信号或低信号为主。肝癌不均匀的T2W I信号、静脉癌栓及假包膜的出现几率在各分型之间存在统计学意义。在T1W I假包膜显示率明显高于T2W I和脂肪抑制序列。MR I对肝癌的诊断准确率达91.42%。结论肝癌的MR I信号极具特征性,在肝癌的诊断中具有极高的诊断价值。

Primary Hepatocellular Carcinoma: MRI Diagnosis

Objective To explore MRI features and diagnostic value of primary hepatocellular carcinoma(PHCC).Methods Onehundred and seventy-four patients which were diagnosed as PHCC by MRI were analyzed retrospectively,including signal intensity ofPHCC,pseudocapsules,the sign out of PHCC(such as the tumor thrombi in portal or hepatic vein,lymph nodule in abdomen),and therelationship between them and tumor patterns.The accurate and misdiagnostic rate of MRI in the cases of PHCC proved by pathology were analysed.Results The signal intensity of PHCC was mainly hypointense or slightly hypointense on T_1WI and slightly hyperintense on T_2WI.The accurate rate of MRI in diagnosis of PHCC was 91.42%.The appeared rate of unhomogeneous signal intense of PHCC on T_2WI,thetumor thrombi in portal or hepatic veins and the peudocapsules was of significance in statistics between different type of PHCC.Pseudocapsules were shown better on T_1WI than on T_2WI and fat suppression.Conclusion MRI signal intensity of PHCC is socharacteristic that it has improtant value in diagnosing PHCC.