Educational Objectives1. Acute pancreatitis is an acute inflammatory process of the pancreas that may also involve adjacent or remote tissues and organs.2. Imaging is frequently recommended to confirm the clinical diagnosis, ascertain the cause, and grade the extent and severity of acute pancreatitis.3. Radiography, upper gastrointestinal series, and ultrasound are of limited value in the diagnosis of acute pancreatitis.4. CT currently plays an important role in imaging of patients with acute pancreatitis, the identification of complications, and assessing the response to treatment.5. Although sensitive for the detection of acute pancreatitis, MRI is used less commonly than CT. MRI is especially useful for imaging patients with iodine allergies, characterizing collections, and evaluation of an abnormal or disconnected pancreatic duct that is easily overlooked. In addition, a heavily T2-weighted MRCP sequence may assist in diagnosis of choledocholithiasis.