Focal liver lesions: Practical magnetic resonance imaging approach

Figure 7 Hepatocellular carcinoma. In- (A) and opposed-phase (B) GRE T1-WI, fat-suppressed FSE T2-WI (C), pre (D) and postcontrast fat-suppressed 3D-GRE T1-WI at the arterial (E), portal venous (F) and interstitial (G) phases. There is a small peripheral lesion on the right lobe of a cirrhotic liver (arrow, A-G), showing drop of signal intensity on opposed-phase (B) comparing with the in-phase (A) images, which is suggestive of fat content. The lesion demonstrates mild high signal intensity on T2-WI (C), low signal intensity on pre-contrast T1-WI (C), heterogeneous enhancement on early post-contrast (E) and subsequent washout with associated pseudocapsule on delayed post-contrast images (F and G), in keeping with a small fat-containing hepatocellular carcinoma. GRE: Gradient-echo; FSE: Fast spinecho; T1-WI: T1-weighted images.