What is CT Cerebral Angiography?
In CT angiography (CTA), computed tomography using a contrast material produces a contrast material to produce pictures of blood vessels of the brain.
What are some common uses of the procedure?
Physicians use the procedure to:
- Show the presence of diseased cerebral arteries such as cerebral aneurysms
- Guide surgeons making in treating repairs to diseased blood vessels
- Plan for a surgical operation
- Screen individuals with neurological symptoms for cerebral arterial disease.
How should I prepare for the procedure?
You should wear comfortable, loose-fitting clothing to your exam. You may be given a gown to wear during the procedure.
Metal objects including jewelry, eyeglasses, dentures and hairpins may affect the CT images and should be left at home or removed prior to your exam. You may also be asked to remove hearing aids and removable dental work.
You may be asked not to eat or drink anything for several hours beforehand, especially if a contrast material will be used in your exam. You should inform your physician of any medications you are taking and if you have any allergies, especially to contrast materials.
Also inform your doctor of any recent illnesses or other medical conditions, and if you have 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 physician or technologist if there is any possibility that they are pregnant.