Computed tomography angiography (CTA) is an examination that uses X-rays to visualize blood flow in arterial and venous vessels throughout the body, from arteries serving the brain to those bringing blood to the lungs, kidneys and arms and legs. CT combines the use of X-rays with computerized analysis of the images. Beams of X-rays are passed from a rotating device through the patient’s body from several angles to provide cross-sectional images, which are electronically assembled into a three-dimensional picture.
Preparing for a CTA
- If you are scheduled for a CTA please do not eat after midnight or for 4 hours before your appointment.
- Drink 3 to 4 cups of water during the period of 4 hours before the scheduled procedure.
- You may take medication with water. Contact your healthcare provider if you take medication for diabetes.
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- Diagnostic Imaging of Southbury