In recent years, the annual incidence of acute pancreatitis (AP) has ranged from 5 to 80 cases per 100 000 population, with mortality of 2%-10%. 1 Pancreatic/peripancreatic necrosis is involved in the aggravation of AP. The current gold standard for the diagnosis of pancreatic necrosis is contrast-enhanced computed tomography (CE-CT). 2 However, the CT value is qualitative. It has been reported that pancreatic perfusion CT (P-CT) can detect pancreatic ischemia. P-CT is used for early detection of brain ischemia, so it is one of the functional imaging modalities and can evaluate local site perfusion of the tissue. From the various data obtained by P-CT, a time-density curve (TDC) is drawn by rapid injection of the iodocontrast media transvenously, performing the same sectional consecutive scans over time; moreover, we