CT scan of the abdomen. Coronal view of the abdomen, acquired using a computed tomography scan with intravenous contrast, at presentation of the patient in the emergency department. The gallbladder is hydropic, with a thickened wall and positioned adjacent to the lateral abdominal wall. No gallstones are visible. Some isolated free fluid is seen between the right liver lobe and the diaphragm, as well as some fluid and fatty infiltration around the gallbladder. Radiological findings are suggestive of an acalculous cholecystitis.