Contrast-enhanced MRI sequence in the diagnosis of cholangiocarcinoma / 中华普通外科杂志

ABSTRACT

Objective To evaluate contrast-enhanced MRI sequence for diagnosing cholangiocarcinoma.Methods Cholangiocarcinoma was confirmed by surgery and pathology in 17 cases,all underwent preoperative CT and MRI T1-VIBE scan with contrast-enhancement sequence.We retrospectively analyzed imaging signs in two scan methods,including lesion position,number,size,enhancement degree,expansion degree of bile duct,invasion of adjacent artery and portal vein,and portal vein tumor thrombosis.The differences on detecting lesions between two methods were compared.Results The contrast to noise ratio (CNR) between tumor and liver tissue in MRI T1-VIBE images was obviously superior to that in CT images.Peripheral lesion boundary in T1-VIBE enhanced images was clearer than CT.One hemorrhage lesion was shown in T1-VIBE images,and tumor thrombosis was visible in the left branch of portal vein in 1 case.Bile duct wall lesions in T1-VIBE enhanced images was more evident than CT in hilar cholangiocarcinoma and extrahepatic cholangiocarcinoma.The VIBE enhanced images find more lesions in 9 out of 11 multiple focus cases,compared with CT images.Conclusions Contrast-enhanced MRI T1-VIBE sequence can give more comprehensive and clear evaluation on cholangiocarcinoma,and has important clinical diagnostic values.