Magnetic resonance imaging ancillary features used in Liver Imaging Reporting and Data System: An illustrative review

Figure 2 Late capsular enhancement/capsule appearance. Fat-suppressed T2-weighted image (A), and pre- (B) and post-contrast fat-suppressed 3D-GRE T1-weighted images during the late hepatic arterial (C) and delayed phases (D). There is a 3 cm nodule in the right hepatic lobe, which demonstrates mildly high T2 signal intensity (arrow, A) and near iso T1 signal intensity on precontrast T1-weighted images (arrow, B). Arterial hyperenhancement is seen (C) and in the delayed phase, the nodule becomes isointense compared to the background liver, without definite washout (D). A thin peripheral rim of smooth hyperenhancement is seen in the delayed phase (D). Note that despite the lack of delayed washout the presence of late capsule enhancement allows a confident diagnosis of hepatocellular carcinoma.