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Hyperdense crescent sign of the aortic arch and descending aorta on non contrast imaging indicating intramural haematoma, which starts distal to the left subclavian artery origin. No dissection on the arterial phase. Minor enhancement of the descending aortic intramural haematoma anteriorly. Ascending aorta and arch vessels are normal.
Bilobed infrarenal AAA with mural thrombus terminates at the bifurcation. No features of complication.
No end organ infarction.
Early enhancement of the IVC and hepatic veins due to contrast reflux from the right atrium into IVC (passive hepatic congestion).