The Value of CT Cholangiography in Primary Sclerosing Cholangitis

Cholografin 20ml will be diluted in 100 ml of normal saline and infused over 30 minute time interval. Following the infusion of the cholografin, morphine (0.04 mg/kg) will be administered to contract the sphincter of Oddi and improve bile duct distension and visualization. Thirty minutes following the administration of morphine a test scan (CT cholangiography) will be performed through the liver to determine if there is adequate biliary excretion. The test scan will consist of 10 mm thick image obtained through the mid liver. If there is evidence of biliary excretion, high-resolution images will be performed through the liver and bile ducts. The axial images will be reconstructed into maximum intensity projection models and volume rendered models that can be viewed in 3-dimension.