If a large amount of contrast material leaks around your IV site, it can irritate your skin or the blood vessels and nerves just under your skin. If you have any history of allergic reactions, you may be given medicine to lessen the risk for an allergic reaction before the test. Always let your radiologist know if you have any history of allergies or an allergy to contrast material. No radiation remains in your body after a CT scan.Īllergic reactions. The amount of radiation used during CT angiography is considered minimal, so the risk for radiation exposure is low. There is always a slight risk for cancer from repeated exposure to radiation, but the benefits of getting an accurate diagnosis generally outweigh the risks. What are the risks for a computed tomography angiography? Your healthcare provider may have other reasons for ordering this test. This type of test may also help your healthcare provider plan cancer treatment or prepare you for a kidney transplant. Information from CT angiography may help prevent a stroke or a heart attack. To evaluate a tumor that is fed by blood vessels To find blood clots that may have formed in your leg veins and traveled into your lungs. To identify blood vessels damaged by injury To find abnormal blood vessel formations inside your brain To find blood vessels that have become narrowed by atherosclerosis (fatty material that forms plaques in the walls of arteries) To find an aneurysm (a blood vessel that has become enlarged and may be in danger of rupturing) Some reasons to have a CT angiogram include: Healthcare providers may use the information from this test to learn more about your condition and to decide the best way to treat you. You may need this medical test if you have an abnormality that involves the blood vessels of your brain, heart, lungs, kidneys, or other parts of your body. Why might I need computed tomography angiography? The dye injected to perform CT angiography is called a contrast material because it "lights up" blood vessels and tissues that are being studied. The dye is injected through an intravenous (IV) line started in your arm or hand.Ī computerized tomography scan, or CT scan, is a type of X-ray that uses a computer to make cross-sectional images of your body. CT angiography is a type of medical test that combines a CT scan with an injection of a special dye to produce pictures of blood vessels and tissues in a part of your body.
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