Background: The contrast materials are considered vital factors for successful EVAR. However, they have their demerits as allergy and contrast-induced nephropathy. Methods: 20 cases underwent CO2-DSA assisted EVAR for infra-renal AAA. All procedures were performed using two angiographic methods in each procedure: automated iodinated contrast material digital subtraction angiography (DSA) and CO2 automated DSA. Upper and lower sealing zone are evaluated before and after deployment of the graft, as regard their visualization