【摘要】 目的分析肝局灶性结节增生(FNH)的CT及DSA影像表现特征。方法回顾性分析经病理证实的16例18个FNH的影像表现,所有病例均行CT平扫及动态增强扫描,其中3例行DSA肝动脉造影。结果16例18个FNH病灶CT平扫呈等或稍低密度;增强扫描动脉期均为除中央瘢痕外病变实质呈显著均匀强化,门静脉期14个下降到稍高密度,4例为等密度;其中8例显示中央瘢痕组织,3例中央瘢痕延迟扫描后出现强化。3例血管造影均显示FNH的供血动脉来自肝动脉系统,供血动脉明显增粗、扭曲,进入病灶中心后呈离心性放射状供血。结论典型FNH的CT扫描特征为增强后动脉期病变强化明显且均匀,中央低密度瘢痕在延迟期可强化。血管造影显示病灶为肝动脉供血,供血动脉主干进入病灶中心后呈轮辐状向四周分支供血。更多还原

【Abstract】 Objective To analyse CT and DSA imaging features of hepatic focal nodular hyperplasia(FNH).Methods 16 patients 18 lesions with FNH proved pathologically underwent plain and dynamic contrast-enhanced CT scans.Transarterial angiography was performed in 3 patients.All the imaging features of CT and DSA were analyzed retrospectively.Results All 16 cases 18 lesions of FNH showed iso-density or slight hypodensity on plain CT scan,and showed homogeneous intense enhancement of the entire lesion except the central scar on arterial phase.14 lesions showed slight hyperdensity and 4 lesions showed iso-density on portal venous phase.The central scar were observed in 8 lesions and 3 of 8 showed enhance on delayed phase.On the angiography images,dilated and tortuous feeding arteries arise from hepatic artery,and radiate arterial branches from the central area of the lesion were seen in all the 3 patients.Conclusion Typical FNH is presented slight hypodensity on plain CT scan,and homogeneous intense enhancement in the early arterial phase,and enhancement of the central scar in delayed phase.On the angiography imaging,feeding arteries of FNH is presented as radiate vascular architecture which arise from hepatic artery.更多还原