目的分析肝脏局灶性结节增生 (FNH)的CT及MRI影像学表现及预后。方 法 将我院自2013年9月-2017年9月收治 的32例FNH患者纳入研究范围，回顾性 分析其CT及MRI影像资料，分析CT/MRI平 扫、动态增强扫描下病灶位置、大小、 形态及主要合并征象及其与周围组织血 管的关系，并描述不同时期的密度/信号 变化情况。结果 CT平扫10例等密度、 22例为稍低密度，14例可见裂隙状、条 状、星芒状低密度中央瘢痕；增强扫描 时均可见清晰边界，30例动脉期明显强 化，但中央瘢痕均无强化表现，5例于病 灶内及周围均可见明显强化增粗迂曲动 脉，门脉期均有不同程度的强化减低，6 例中央瘢痕轻度强化，延迟期实质部分 强化程度持续下降，14例中央瘢痕延迟 强化呈稍高密度表现；行MRI平扫，24例 T2WI高信号，8例等信号，T1WI 17例稍 低信号，12例等信号，3例高信号，12例 病灶内中央瘢痕，为T2WI高信号，T1WI 低信号；行MRI增强扫描时，动脉期、门 静脉期、延迟期均可见与CT 增强扫描类 似征像，其中8例于门静脉期可见中央瘢 痕强化，延迟期12例呈持续强化表现， 为稍高信号。结论 CT及MRI均能对FNH病 理及血供进行准确、全面表达，于FNH的 临床诊断鉴别有重要价值。

Objective To analyze the CT and MRI findings and the prognosis of focal nodular hyperplasia(FNH). Methods 32 patients with FNH who were admitted to the hospital from September 2013 to September 2017 were included in the study. Their CT and MRI image data were analyzed retrospectively. The relationship between the location, size, shape and main signs showed by CT/MRI plain and dynamic enhanced scan and peripheral tissues was analyzed. Changes of density / signal in different periods were described. Results CT plain scan showed 10 cases with equal density, 22 cases with slightly low density and 14 cases with slight like, strip and star-like low-density central scar. Enhanced scan showed clear boundary, 30 cases with obvious enhancement in the arterial phase and no enhancement of central scar. There were 5 cases with obviously enhanced thickened tortuous artery in and around lesions, and different degrees of enhancement decrease in portal phase. 6 cases showed mild enhancement of the central scar, and continuous decrease of enhancement of substantial part in delayed phase. 14 cases showed delayed enhancement of central scar and slightly high-density expression. MRI plain scan showed 24 cases of high signal and 8 cases of equal signal on T2WI, 17 cases of slightly low signal, 12 cases of equal signal and 3 cases of high signal on T1WI. There were 12 cases of central scar in lesions, showing high signal on T2WI and low signal on T1WI. MRI enhanced scan showed similar signs with CT enhanced scan in arterial phase, portal phase and delayed phase. 8 cases showed central scar enhancement in portal phase, and 12 cases showed continuous enhancement in delayed phase, which was slightly high signal. Conclusion Both CT and MRI can accurately and comprehensively display the pathology and blood supply of FNH, which is of great value in the diagnosis and identification of FNH.