MRI performed 3 weeks later demonstrates the same features.
The pancreas is diffusely enlarged ("sausage-shaped pancreas") with decreased signal intensity on T1, and increased signal intensity on T2, mainly of the pancreatic head which shows areas of restricted diffusion. Delayed parenchymal enhancement on dynamic sequences with a peripancreatic rim of low signal "halo" well-demonstrated on postcontrast sequences. The gallbladder is distended with persistent dilatation of the pancreatic duct as well as the intra-and extrabiliary ducts.