Evaluation of intra- and extra-hepatic biliary and pancreatic duct dilatation, and the cause of obstruction.
Advantages
Noninvasive. No ionizing radiation. Imaging in all planes. Can image ducts beyond the point of obstruction.
Evaluates extra-luminal disease.
Disadvantages/Contraindications
Special instrumentation required for patients on life support.
Contraindications and risks: Contraindicated in patients with cardiac pacemakers, intraocular metallic foreign bodies, intracranial aneurysm clips, cochlear implants, and some artificial heart valves.
Preparation
Preferably NPO for 6 hours.
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