Figure 1

A 36-year-old man with liver injury (not shown). Images of contrast enhanced MR cholangiography acquired at 10 minutes, 20 minutes, 30 minutes and 90 minutes show progressive improvement of intrahepatic bile ducts visualization (arrowheads) from very poor visualization at 10 minutes to excellent visualization at 90 minutes. The average scores given by three readers are 1.00 (10 minutes), 4.00 (20 minutes), 4.67 (30 minutes), 5.00 (90 minutes).