Analysis of ultrasonic scanning images demonstrated that each form of chronic pancreatitis (CP) has its characteristic US features. For example, if CP runs in the presence of duodenal ulcer, the pancreas presents with blurred outline, high parenchymal echogenicity, diffuse structural heterogeneity, short-term visualization of the Wirsung's duct. There were also gastric hypersecretion and signs of fibrosing ductulitis. Biliary and alcoholic CP is characterized by the absence of dynamic changes of the Wirsung's duct diameter.