扩散加权成像在肝包虫病鉴别诊断中的作用

目的：探讨磁共振扩散加权成像（DWI）及表观扩散系数值（ADC值）在肝包虫病诊断及鉴别诊断中的应用价值。方法：回顾性分析89例122个肝脏占位性病灶（22例肝囊肿40个病灶,23例肝癌32个病灶,29例肝细粒棘球蚴病35个病灶,15例肝泡状棘球蚴病15个病灶）的DWI图及ADC图,并测量病灶的ADC值,比较其间是否存在统计学差异。结果：肝囊肿、肝癌、肝细粒棘球蚴病及肝泡状棘球蚴病的ADC值分别为（4.33±0.25）×10-3（、1.63±0.08）×10-3（、3.50±0.35）×10-3和（2.22±0.23）×10-3mm2/s,各病变组之间均存在统计学差异（P〈0.05）。在ADC图上肝细粒棘球蚴病的囊液呈高信号,包膜呈低信号;而肝泡状棘球蚴病的液化坏死区表现不一,部分病灶的液化坏死区呈明显低信号。结论：DWI和ADC图分析及ADC值测量可为不典型肝包虫病的诊断及鉴别诊断提供重要的补充信息,尤其是病灶ADC值的测量对单囊性细粒棘球蚴病的鉴别诊断具有较大的应用价值。

Differential diagnosis of hepatic echinococcosis with diffusion weighted MR imaging

Objective:To explore the role of diffusion weighted imaging(DWI) and apparent diffusion coefficient(ADC) mapping features in differential diagnosis of hepatic echinococcosis.Methods:A retrospective analysis of DWI and ADC map findings was performed in 89 patients with 122 focal hepatic masses including 22 patients with 40 foci of hepatic cysts,23 patients with 32 foci of hepatocellular carcinomas,29 patients with 35 hepatic cystic echinococcoses,and 15 patients with 15 hepatic alveolar echinococcoses.A stat...