Frontal (left) and axial (right) computed tomography (CT) scans through the aortic valve of a 48 year old with aortic valve insufficiency (AVI). This is an aortic valve disease that occurs when the aortic valve can no longer control the flow of blood from the left ventricle into the aorta. The axial scan shows a leak of the aortic valve, measuring the size of an isosceles triangle with a 1cm side (in diastolic phase). Aortic valve insufficiency can be treated by aortic valve replacement or valve repair.