Diffusion-weighted imaging of biliopancreatic disorders: Correlation with conventional magnetic resonance imaging

Figure 17 Focal pancreatitis in a 52-year-old man. A: Coronal image from thick-slab single-shot MRCP shows a double duct sign with tapered narrowing of pancreatic duct in the head of the pancreas; B: On DWI at b = 800 s/mm^2, focal pancreatitis (asterisk) shows hyperintensity; C: DWI at b = 800 s/mm² superior to (B) shows high signal intensity of the remaining pancreas due to obstructive pancreatitis. The remaining pancreas is slightly hypointense (arrowheads) relative to pancreatic adenocarcinoma. The ADC value of focal pancreatitis (1.48 ± 0.16 mm²/s) is similar to that of the remaining pancreas (1.54 ± 0.28 mm²/s). Note a hyperintense reactive lymph node (arrow). DWI: Diffusion-weighted magnetic resonance imaging; MRCP: Magnetic resonance cholangiopancreatography; ADC: Apparent diffusion coefficient.