Fig. 2

A male patient with chronic hepatitis B and a surgically confirmed hepatocellular carcinoma. a, b showed that the signal in the out-phase of the lesion reduced compared with that in the in-phase, indicating that the lesion contains fat. T1WI shows hypointensity (c), no obvious enhancement in the late arterial phase (AP) (d), and the enhancement degree in the portal venous phase (PVP) was still hypointensity (e), TP phase (f) and HBP phase (g) were hypointensity, and both T2WI (i) and DWI (h) showed hyperintensity. The nodule was 1.5 cm and was classified into LR-4 basing on the major features. Whenusing AF-HCC to classify the nodule, it can be upgraded, especially for the feature of TP hypointensity. This nodule was confirmed as hepatocellular carcinoma after surgical resection