**1. Introduction**

Imaging of pancreatitis is complex and requires in-depth knowledge of both radiological techniques and pathophysiology, pathology and clinical manifestation of these diseases. In fact, pancreatitis has very different forms and manifestations, which require completely different treatments, therefore imaging, especially CT and MRI, are fundamental for the early classification and the consequent therapy. Furthermore, many forms of pancreatitis enter into differential diagnoses with other non-inflammatory conditions of the pancreas, for which a correct diagnosis as early as possible is essential. In this chapter, we will analyze the imaging aspects of acute pancreatitis, chronic pancreatitis and rarer forms such as autoimmune and paraduodenal.
