Objective To study the diagnostic value of MRCP in cholangiocarcinoma.

The tumor displayed the character of low echo (21/32), obscure boundary(22/32), vascular invasion (26/32), pancreatic duct and common bile duct dilation (19/36).

Tumors of the pancreatic head pushed the pancreasduodenal arterial circle to the right, that of the duodenal ampullary and of common bile duct pushed the arterial circle to the right.