A coronary computed tomography angiogram (CTA) is an imaging test that is used to detect if the coronary arteries have narrowed due to a build up of plaque. The test uses an X-ray to take pictures of your heart. A contrast material is injected into your veins before the test to help create the best possible images.
During this test, you lie on a table as it passes through the X-ray machine. It is generally painless and only takes a few minutes.