并殖吸虫病肝损害的CT、MRI特征

目的探讨并殖吸虫病肝损害的CT及MR特征性表现。方法对18例经临床治疗奏效或病理证实的并殖吸虫病肝损害的CT及MRI征象进行回顾性分析。经CT检查10例，MRI检查2例，同时行CT及MRI检查6例。结果单发病灶4例，多发病灶14例。病灶均分布在肝包膜下或门脉分支周围肝实质内，呈楔形、不规则形或条形，部分病例可见“隧道征”及“围管征”；16例CT平扫病灶呈稍低密度12例，等密度4例，边缘模糊；动态增强动脉期大部分病变轻度强化或周边轻度强化，少数无强化；门脉期病灶显示最多，边界清晰，呈相对低密度；延迟期病灶强化消失。MRI检查8例中，呈等T1、稍长T2信号2例，呈稍长T1、稍长T2信号6例；动态增强扫描，多发病灶在动脉期可见斑片状强化；门脉期呈多发低信号，边缘清晰；延迟期病灶强化呈等信号改变。肝内单发病灶表现为环状及分隔样强化，门脉期显示最清。结论并殖吸虫病肝损害白}『CT蜃MRT嘉瑚有一事特征．对该病有赫高的诊断价倌．

The appearances of hepatic paragonimiasis on CT and MRI

To investigate the appearances of hepatic paragonimiasis on CT and MRI. CT and MRI imaging findings of 18 cases of hepatic paragonimiasis which were clinically and pathologically confirmed were retrospectively analyzed. Ten patients underwent CT scan, 2 patients underwent MRI examination, and 6 patients underwent CT and MRI. A single lesion in 4 cases, multiple lesions in 14 cases. All lesions were located in subcapsular parenchyma or surrounding the portal vein. The lesion were irregular or strip like, some lesion on the right hepatic lobe were tunnel like. On plain CT scan imaging, the lesions showed slightly low density or isodensity with fuzzy edge. On multi-phase contrast scan, enhancement was light on edge or no enhance- ment on arterial stage, the lesions were notable and showed relatively low density on venous stage, and isodensity or slightly low density on delayed stage. 8 cases were found isosignal or slightly long T1, slightly long T2. The enhancement pattern of MRI was similar to that of CT. The appearances of hepatic paragonimiasis on CT and MRI were relatively specific, CT and MRI can be a valuable tool for the diagnosis of hel~atic !oaragonimiasis.