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Abstract #1694

Detection of Portal Vein Thrombosis in Patients with Hepatocellular Carcinoma: Can Gadoxetic Acid–enhanced MR Imaging Replace CT?

Jae Seok Bae1, Jeong Min Lee1, Jeong-Hee Yoon1, Siwon Jang1, Jin Wook Chung1, and Joon Koo Han1

1Seoul National University Hospital, Seoul, Korea, Republic of

Gadoxetic acid-enhanced magnetic resonance imaging (GA-MRI) provides higher sensitivity for the detection of HCCs than CT or MRI using extracellular contrast media, but may have a disadvantage in detection of portal vein thrombosis (PVT) related with decreased contrast between the portal vein and liver parenchyma during dynamic phase. For detection of PVT in patients with HCC, we demonstrated that GA-MRI was noninferior to CT for sensitivity (78.8% versus 77.7%, respectively) and was superior to CT for specificity (95.4% versus 92.4%, respectively). For characterization of the PVT as benign or malignant, the GA-MRI showed noninferior accuracy to CT (93.7% versus 92.4%).

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