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Overview A computerized tomography (CT) coronary angiogram is an imaging test that looks at the arteries that supply blood to the heart. A CT coronary angiogram uses a powerful X-ray machine to make images of the heart and its blood vessels. The test is used to diagnose many different heart conditions. CT Coronary Angiography: Procedure, costs, and differences. Find nearby facilities, interpret reports, and understand calcium scoring. Make informed heart health decision. Learn about CT angiography, a technique for visualizing arteries and veins throughout the body using contrast and CT scans. Find out the medical uses, advantages, and limitations of CTA for different areas such as heart, lungs, kidneys, brain, and legs. A CT angiogram is an imaging test that makes 3D pictures of your blood vessels. It uses CT scans and contrast dye. Learn how it works and how to prep.