Magnetic Resonance Angiography for Thoracic Aortic Aneurysm with Intravenous Contrast

What is this test?

Magnetic resonance angiography, or MRA, creates detailed images of blood vessels. For a thoracic aortic aneurysm, the test examines the main artery carrying blood from the heart through the chest. Intravenous contrast may be used to make the aorta and nearby blood vessels easier to see.

Why might I need this test?

This test may be used to detect or monitor a thoracic aortic aneurysm, especially in someone with a family history, certain genetic conditions, high blood pressure, or previous aortic imaging abnormalities. It can also help evaluate an enlargement found on another imaging study.

How is the test performed?

You will lie on a table that moves into an MRI scanner. An intravenous line may be placed in your arm to administer contrast, and the scanner will take a series of images of the chest and aorta. The procedure is generally painless, although the scanner can be noisy and somewhat confining.

How do I prepare for the test?

Follow the imaging center's instructions about food, fluids, and medications. Tell the care team about any MRI implants, metal in your body, previous contrast reactions, kidney disease, or possibility of pregnancy. You may be asked to remove jewelry, keys, cards, and other metal or electronic items before entering the scanner room.