Fig. 2. 68-year-old man with respiratory motion artifacts.

This arterial phase image of gadoxetate-enhanced liver MR (B) is severely contaminated by respiratory motion artifacts related to TSM, whereas noncontrast (A), portal venous (C), and hepatobiliary (D) phase images look fine. Owing to presence of TSM, arterial hypervascularity of lesion in right lobe of liver (arrows) cannot be exactly evaluated on this MR image, although lesion (arrows) is clearly defined on non-contrast (A), portal venous (C), and hepatobiliary (D) phase images. Lesion was confirmed as HCC after surgery. HCC = hepatocellular carcinoma, TSM = transient severe motion