Figure 3From: Abdominal vascular emergencies: US and CT assessmentImpending aortic aneurysm rupture (a) Color-Doppler-sonography shows a large aortic aneurysm with intra thrombus flow (b) Axial unenhanced CT image depicts an abdominal aortic aneurysm with a hyperattenuating crescent sign (arrow), (c) and axial contrast-enhanced (b) which repre- sents an acute hematoma within the aneurysm wallBack to article page