<正> Objective: To investigate the clinical significance of magnetic resonance cholangiopancreatography（MRCP） utilizing half-Fourier acquisition single-shot fast spin-echo （HASTE） in the diagnosis of bile duct diseases.Methods: Forty-three patients with obstructive jaundice and 4 without were enrolled in this study. The underlying dis-eases included bile duct calculi（13 cases）

chronic cholangitis （14 cases） malignant tumors （18 cases） and congeni-tal biliary cysts （2 cases）. All patients underwent examinations with magnetic resonance imaging （MRI） and MRCP

and 39 were also examined with B-type ultrasonography

33 with CT and 25 with ERCP and PTC. Three-dimensionalimage reconstruction was performed using volume-rendered technique （VRE） on the basis of the data obtained byMRCP. Results: The biliary calculi were displayed as circular filling defects in MRCP images

with the proximal endof dilated bile duct taking the form of the mouth of a cup. The bile duct of patients with chronic cholangitis showed dis-tal