MRI影像对比观察对急性胰腺炎肝脏损害的探讨

Comparative Study on MRI of Acute Pancreatitis Complicated by Liver Damage

目的探讨急性胰腺炎并发肝脏损害肝脏密度降低的原因,是水肿或是肝脏脂肪含量增加。方法分别对35例肝脏脓肿患者周围低密度水肿带和35例急性胰腺炎肝脏损害患者密度降低的肝脏进行MRI影像学对比观察;检查序列为T2WI脂肪抑制,T1WI同相位,T1WI反相位。结果 35例肝脏脓肿水肿带T2WI脂肪抑制呈高信号,T1WI同相位和T1WI反相位均为低信号,同反相位信号变化不明显;35例急性胰腺炎肝脏损害患者肝脏T2WI脂肪抑制呈等信号,T1WI同相位为稍高信号,25例T1WI反相位呈低信号,10例T1WI反相位呈稍低信号。结论急性胰腺炎肝损害患者与肝脏脓肿周围水肿带MRI影像有明显不同,提示急性胰腺炎肝脏损害不是肝脏水肿,其影像特征符合肝脏脂肪成分增加导致。

Objective To discuss the reason of the decrease of liver intensity in patients with acute pancreatitis （AP） complicated by liver damage whether it was edema or the increase of liver fat content. Methods The peripheral hypoin- tensity edema of patients with abscess and hypointensity liver of patients with AP complicated by liver damage were com- pared on MRI, 35 cases in each group. The examination sequence was T2WI fat suppression, T1WI in phase; and T1WI out phase. Results Of 35 cases with liver abscess, edema was presented as hyperintensity on T2WI fat suppression, hy- pointensity on T1 WI in phase and T1WI out phase, there was no obvious changes between the in phase and the out phase. Of 35 cases with AP complicated by liver damage , the abnormal area was presented as isointensity on T2 WI fat suppression, light hyperintensity on T1WI in phase, while 25 cases among them showed hypointensity and 10 cases showed light hypoin- tensity on T1 WI outphase. Conclusion There is significantly different between patients with AP complicated by liver dam- age and those with abscess, which indicate the liver damage of AP is not hepatic edema and is accord with increasing of liver fat content.