Figure 6a. Ascending aortic aneurysm in a 34-year-old man. (a) Sagittal oblique contrast-enhanced MR angiogram shows marked dilatation of the aortic root (arrow) and the proximal portion of the ascending aorta. This type of aneurysm is typical of Marfan syndrome, but the patient did not have other features of that disease. (b) Axial oblique steady-state free precession cine image of the left ventricular outflow tract shows a markedly dilated aortic root (large arrow) with regurgitant flow (small arrow).