Pancreatitis is a flogistic disease, caused by activation and digestion of pancreas by its enzymes. Diagnosis is based on integrated evaluation of clinical and laboratoristic data and morphological imaging. To evaluate the severity of pancreatitis there is a clinical classification in interstitial--mild pancreatitis and severe--necrotic one. The evaluation of severity is basic, because it is strictly correlated to the prognosis of the patient. CT has revealed the best method for diagnosis, staging and for evaluate the complications and follow-up and in some cases it is useful for therapeutic change.The abdomen X-Ray in orthostatism is performed in every situation suspected for acute abdominal disease, also if aspecific; the ultrasound can be used as first instance method in patient with clinical suspect of acute pancreatitis; the MR has actually a secondary role for the diagnosis, with only except for dubious cases to exclude primitive tumor of pancreas and pancreatic shock, but it represents, instead, first instance method in patients with adverse reaction to contrast medium. The CPRE has, like angiography, a selective indication.
