Fig. 2 | Scientific Reports

Fig. 2

From: Development of an interpretable machine learning model based on CT radiomics for the prediction of post acute pancreatitis diabetes mellitus

Fig. 2

Illustration of the delineation of the pancreatic ROI in acute pancreatitis patients.A patient with mild acute pancreatitis and slight pancreatic enlargement (a). Blurred peripancreatic fat spaces with strip-like exudates and bilateral perirenal fascia thickening are visible. No dilation of the main pancreatic duct is observed. The region of interest (ROI) is outlined layer by layer along the pancreatic edge, avoiding blood vessels and the common bile duct. A case of acute necrotizing pancreatitis with infection and walled-off necrosis (b). A large cystic low-density lesion (approximately 14.7 × 7.2 cm) with gas density is observed, with significant enhancement of the cyst wall on contrast-enhanced imaging. Residual normal pancreatic tissue is seen at the pancreatic head and tail, with no abnormal density or enhancement. The peripancreatic fat space is poorly defined. The ROI is outlined along the cyst boundary (including walled-off necrosis area), while avoiding critical structures such as blood vessels, the common bile duct, gastrointestinal tract, peritoneum, and mesentery. ROI region of interest.

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