The morphology of the main pancreatic duct at E.R.C.P. as a guide to its demonstration by ultrasound.
D002760:Cholangiopancreatography, Endoscopic Retrograde; D006801:Humans; D010182:Pancreatic Diseases / Q000175:diagnosis; D010183:Pancreatic Ducts / Q000033:anatomy & histology*; D014463:Ultrasonography