The control group comprised 32 patients (15 men, 17 women; aged 22 - 99 years) with suspected acute mesenteric ischemia that was disproved at surgery. Results: For the diagnosis of acute mesenteric ischemia, each of the following findings had a specificity of more than 80% and a sensitivity of less than 40%: arterial or venous thrombosis, intramural gas, portal venous gas, focal lack of bowel-wall enhancement, and liver, spleen or kidneys infarcts.