Medical Imaging

CT (CAT) Scan > Exams & Procedures > CT Angiography

Angiography refers to the imaging of vascular anatomy using X-ray machines and the injection of intravenous contrast through an artery. This is somewhat invasive and requires a day admission to the hospital. The advent of high speed multislice spiral CT scanners has resulted in the development of CT angiography scan protocols that produce three dimensional images of vascular anatomy. There is no hospital stay for this procedure and it is non invasive. CT angiography is completed to diagnose: aortic dissections, aortic aneurysm, cerebral aneurysm, pulmonary embolus.

  • The scan takes about 20 minutes.
  • No preparation is required.
  • Check in at the reception desk 15 minutes prior to your scheduled appointment to allow time for registration.
  • You will be asked to change into a hospital gown and to remove any objects that may interfere with the scan.
  • You will need to lie very still on the table as the technologist completes the scan.
  • The Technologist can see and hear you at all times during the scan and can communicate with you via the intercom.
  • Women should inform the technologist if there is any possibility that they may be pregnant.

Will I need to have a needle?

Maybe. You may require an injection of intravenous contrast, which may be needed to evaluate blood vessels and tumours. You may feel a warm sensation throughout your body after the injection of the contrast, and you may experience a metallic taste in your mouth. These sensations are normal and disappear after a few minutes. The technologist will discuss the injection with you before the scan is completed, and will be pleased to answer any questions you may have.