Figure 1a. Figures 1, 2. (1) Normal bile duct. (a) MR cholangiogram demonstrates the proximal extrahepatic duct (arrow) and the proximal right and left hepatic ducts. (b) MR cholangiogram obtained 5 mm anterior to a demonstrates the middle and distal thirds of the extrahepatic bile duct (arrows). (2) Normal gallbladder and cystic duct. MR cholangiogram shows the gallbladder (G) and cystic duct (arrow). The extrahepatic bile duct is also seen (arrowheads).