A Coronary CTA is a radiological test that is used to create detailed three dimensional images of the blood vessels in your heart, coronary arteries, heart chambers, coronary arteries and pulmonary veins. Patients who are at risk of having blockages in the arteries can benefit from a CCTA scan, such as those with a family history of heart disease. A CCTA is faster, less invasive and lower risk than an invasive catheterization.