CT Angiography, Abdominal Aorta, With or Without Intravenous Contrast

What is this test?

CT angiography, or CTA, is a specialized CT scan that creates detailed images of blood vessels. When intravenous contrast is used, the vessels appear more clearly, allowing the abdominal aorta to be evaluated for narrowing, bulging, blockage, or other abnormalities.

Why might I need this test?

Your clinician may order this test to investigate unexplained abdominal or back pain, evaluate an abdominal aortic aneurysm, assess known vessel disease, or plan for a procedure. It may also be used to evaluate symptoms that could involve the aorta or its major branches.

How is the test performed?

You lie on a table while a CT scanner takes images from different angles. If contrast is used, it is given through a vein in your arm, and the scan is timed to capture the contrast as it moves through the blood vessels. The images are then reviewed by a radiologist and reported to your clinician.

How do I prepare for the test?

Follow the imaging center's instructions, which may include avoiding food for several hours before the scan. Tell the care team if you have kidney disease, a previous serious reaction to iodinated contrast, or are pregnant. Bring any medication instructions, especially if you take metformin.