Acute Pancreatitis - Imaging IOC - CECT - Radiological signs: Gasless abdomen: Because of repeated vomiting Colon cut off sign: Due to colonic spasm of transverse colon Sentinel Loop sign: Due to adjacent small bowel loop ileus Renal halo sign: On CT, perinephric fluid collection along with existing Perirenal fat gives a renal halo Chronic pancreatitis: - Has calcifications - On MRCP / ERCP Beaded / toures appearance of pancreatic duct String of Pearls / string of beads appearance Chain of lake appearance - On Braium - Reverse 3 sign of frostberg (also seen in Ca Head of Pancreas) Feature Pancreatic Adenocarcinoma Mass Forming Chronic Pancreatitis Enhancement Heterogenous enhancement Hypoenhancing Main Pancreatic DUCT (MPD) Duct cut off sign Duct penetrating sign MPD / gland ration >0.5 <0.5 Pancreatic parenchymal calcification Uncommon Common Intraductal calculi Absent Present