Figure 7c. MR imaging appearance of typical FNH. (a) Axial T2-weighted single-shot fast spin-echo (SE) image shows a large FNH lesion (straight arrow) that is isointense relative to the surrounding liver parenchyma. The central scar (curved arrow) has slightly higher signal intensity than the lesion. (b) Axial gadolinium-enhanced 2D T1-weighted GRE image obtained during the arterial phase shows intense homogeneous enhancement of the entire lesion (straight arrow), except for the central scar (curved arrow). (c) Axial gadolinium-enhanced 2D T1-weighted GRE image obtained during the portal phase shows that the lesion (straight arrow) has become isointense relative to the surrounding liver parenchyma, and the central scar (curved arrow) has enhanced.