A Cardiac CT scan is a non-invasive way of obtaining information about the location and extent of calcified plaque in the coronary arteries—the vessels that supply oxygen-containing blood to the heart wall. Plaque is a build-up of fat and other substances, including calcium, which can, over time, narrow the arteries or even close off blood flow to the heart. The result may be painful angina in the chest or a heart attack. Because calcium is a marker of coronary artery disease, the amount of calcium detected on a cardiac CT scan is a helpful diagnostic tool. The findings on Cardiac CT are expressed as a calcium score. Another name for this test is Coronary Artery Calcium Scoring. Calcium Scoring allows your doctor to find out how much of this buildup is present so they can recommend the appropriate next step to ensure your overall health.