Читать книгу Clinical Pancreatology for Practising Gastroenterologists and Surgeons - Группа авторов - Страница 98

Acute necrotic collection (ANC) contains both liquefied and nonliquefied necrotic material. Early in the course of pancreatitis, both APFC and ANC have similar imaging findings, but the presence of pancreatic necrosis allows the diagnosis of ANC. Diagnosis of ANC can be more reliable a week after onset of pancreatitis, as peripancreatic fat necrosis is more likely to develop. MRI of ANC shows heterogeneous low signal on T1‐weighted and heterogeneous high signal on T2‐weighted images. Hemorrhage is not uncommon with pancreatic necrosis and will be seen as areas of high signal on T1‐weighted images. The presence of an actively bleeding vessel can be depicted on post‐contrast dynamic imaging as a contrast blush or as gradually increasing signal in the collection.