脂肪肝背景下肝局灶性病变检出率的比较影像学研究

Ultrasonoraphy,Computed Tomography and Magnetic Resonance Imaging in Detecting Focal Lesion in Fatty Liver:A Comparative Analysis

目的比较超声(US)、CT、MRI在脂肪肝背景下肝局灶性病变的检出率。方法回顾性分析129例同时做过US、CT、MRI的肝局灶性病变患者的影像表现,以临床影像综合诊断为参考标准,将其分为脂肪肝组(41例)和非脂肪肝组(88例),以比较两组分别用US、CT、MRI 3种检查方法对肝内局灶性病变数目的检出率。结果US对脂肪肝组和非脂肪肝组肝局灶性病变的检出率分别为52.50%、70.97%(P=0.003);CT对两组病变的检出率分别为70%、85.71%(P=0.002);MRI对两组病变的检出率分别为88.75%、87.56%(P=0.780)。结论MRI对肝局灶性病变的检出率最高且不受脂肪肝背景的影响,而US和CT在脂肪肝背景下对肝脏局灶性病变的检出率均受到影响。

Objective To compare the value of uhrasonography （ US）, computed tomography （CT） and magnetic reso-nance imaging （MRI）in detecting focal lesion in fatty liver. Methods US, CT and MRI images of 129 patients with he-patic focal lesion were retrospectively analyzed. The patients were devided into two groups ： fatty liver group （ group Ⅰ , n =41） and without fatty liver group （group Ⅱ ,n = 88）. Detection rate of focal liver lesion on US, CT and MRI in the two groups were compared. Results The detection rate of hepatic focal lesion in group Ⅰ and group Ⅱ were 52.50% and 70.97% on US, （P = 0. 003 ） ,70% and 85.71% on CT （ P = 0. 002 ）, 88.75% and 87.56% on MRI, respectively （ P = 0.780）. Conclusion Hepatic focal lesions can be well identified on MRI, and poor identified on US and CT at the pres-ence of fatty liver.