Fig. 5
Contrast-enhanced CT image of the abdomen in an 82-year-old male with embolism of the superior mesenteric artery. (a) Contrast-enhanced axial CT shows pronounced intrahepatic portal venous gas (branching hypoattenuating areas) extending into the periphery of the left liver lobe (red arrow). (b) Contrast-enhanced axial CT scan shows dilated and gas-filled loops with an extreme thinning of the bowel wall, a “paper thin wall”, due to transmural small-bowel infarction (orange arrow). Pneumatosis (white arrow) is also seen; fat stranding (*) and gas in mesenteric veins (white arrowhead)