Machine learning and radiomics for differentiating severe from moderately severe acute necrotizing pancreatitis on contrast-enhanced computed tomography

Figure 2 Mixed pancreatic necrosis. A: Schematic of mixed pancreatic necrosis: Necrotic foci in the pancreatic body and tail with peripancreatic fatty debris; B: Portal venous contrast-enhanced computed tomography in a 55-year-old female with mixed necrosis shows parenchymal necrosis (black star), peripancreatic necrotic collections (white arrows) containing fatty debris (black arrowhead), and residual normal pancreas (white star); C: Corresponding regions of interests: Green area manually delineates the entire pancreatic parenchyma (necrotic tissue included; ducts and vessels excluded); yellow area represents peripancreatic necrotic collections at the same anatomical levels as the pancreas. P: Pancreas; N: Necrotic foci; FD: Fatty debris; ANC: Acute necrotizing collection.