How to Prepare for a CT Angiography

You should wear comfortable, loose-fitting clothing to your exam. You may be given a gown to wear during the procedure.

Metal objects such as jewelry, eyeglasses and hairpins may affect the CT images and should be left at home or removed prior to your exam. You also may be asked to remove hearing aids, dentures and removable dental work.

You may be asked not to eat or drink anything for several hours beforehand, especially since a contrast material will be used in your exam. You should inform your doctor of any medications you are taking and if you have any allergies. If you have a known allergy to contrast material, or "dye," your doctor may prescribe medications to reduce the risk of an allergic reaction.

Also inform your doctor of any recent illnesses or other medical conditions, including a history of heart disease, asthma, diabetes, kidney disease or thyroid problems. Any of these conditions may increase the risk of an unusual adverse effect.

Women should always inform their doctor and the CT technologist if there is any possibility that they are pregnant.

If you are breastfeeding at the time of the exam, you should ask your radiologist how to proceed. It may help to pump breast milk ahead of time and keep it on hand for use after contrast material has cleared from your body, about 24 hours after the test.