Computed tomography angiography (CTA) is a specialized x-ray that examines blood flow in blood vessels when they are filled with a contrast material. Contrast material is a substance that makes the blood vessels show on an x-ray. Computed tomography (CT) uses a complex machine to take x-rays from many different views, producing detailed two-dimensional images that can be combined by a computer to form three-dimensional images.

CTA can be used to view blood vessels throughout the body. It is most commonly used to study the:

  • Brain
  • Heart
  • Lungs
  • Kidneys
  • Legs or arms

Blood Vessel in Brain
Blood Flow Brain
Copyright © Nucleus Medical Media, Inc.

This test is used to help doctors identify diseased, narrowed, enlarged, and blocked blood vessels and locate where internal bleeding may be occurring. Some specific uses include:

  • Detecting atherosclerosis, a narrowing of the arteries
  • Detecting an aneurysm, a ballooning out of a section of a blood vessel
  • Examining arteries in the lungs to check for blockage of a blood vessel
  • Evaluating disease in kidney arteries

Heart Attack
Heart Attack
Copyright © Nucleus Medical Media, Inc.