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A coronary computed tomography angiogram (CTA) is a new heart-imaging test currently undergoing rapid development. CTA is a non-invasive diagnostic method to detect stenosis and to determine fatty deposits in the coronary arteries, which supply the heart muscle with blood. In some diagnostic cases, CTA replaces a catheter-based intervention. The information collected during the coronary CTA is used to create 3-D images of the coronary arteries on a computer screen. A CTA can provide important insights into the extent and nature of plaque formation in the walls of the arteries that has not yet hardened, but may lead to future problems. This quick and safe examination is painless for the patient.