Introduction: Basic Principles of MR Imaging; MRCP Technique: MR sequences, practical set-up of an MRCP study, use of contrast media and drugs, comparison with other techniques; Intrahepatic Bile Ducts: normal anatomy and variants, benign nontraumatic abnormalities, traumatic, postoperative and iatrogenic abnormalities, malignant tumors; Extrahepatic Bile Duct: normal anatomy and variants, benign nontraumatic abnormalities, traumatic, postoperative and iatrogenic abnormalities, malignant tumors; Gallbladder and Cystic Duct: normal anatomy and variants, benign nontraumatic abnormalities, traumatic, postoperative, and iatrogenic abnormalities, malignant tumors; Vaterian Sphincter Complex: normal anatomy and variants, benign nontraumatic abnormalities, traumatic, postoperative, and iatrogenic abnormalities, malignant tumors; Pancreatic Ducts: normal anatomy and variants, benign nontraumatic abnormalities, traumatic, postoperative, and iatrogenic abnormalities, malignant tumors and tumors with malignant potential.