A computed tomography (CT) scan creates computer-generated pictures of the heart, brain, or other areas of the body. A CT angiogram is for the express purpose of viewing the arterial circulation.
During and shortly after dye injection, a rapid sequence CT scan can provide two dimensional and three dimensional images of the thoracic or abdominal aorta. The pulmonary arteries may also be seen to rule out pulmonary embolism.
Three dimensional CT angiography helps to plan the placement of stent grafts now used to treat aneurysmal disease.