Fig. 14
From: Cystic pancreatic lesions: MR imaging findings and management
Chronic obstructive pancreatitis. At MRCP (a), a diffuse dilatation of the main pancreatic duct is appreciable through the gland with finger-like dilatation of branch ducts (arrow). At T2w, a defect in the prepapillary portion of the wirsung duct is appreciable (arrow). At unenhanced CT (c), a gross calcification is visible in the head of the pancreas, related to the intraductal calculus, responsible for the dilatation of the wirsung duct upstream, not visible on axial T2w (d)