Figure 2.

Pathologically proven autoimmune hepatitis in a 49-year-old man. (a) T2-weighted image shows markedly hyperintense areas adjacent to the intrahepatic portal veins. (b) Corresponding diffusion-weighted image also shows them as mildly hyperintense areas. (c) Gadoxetate-disodium enhanced image obtained during the portal venous phase shows the areas with minimal enhancement. These findings are consistent with periportal edema. (d) Image obtained during the hepatobiliary phase shows moderate periportal enhancement. The enhancement areas match the periportal T2-hyperintense areas (corresponding periportal enhancement pattern). Note the poor hepatobiliary enhancement of liver parenchyma (liver-spleen relative enhancement ratio = 0.89).