Coronary artery evaluation. Coloured 3D computed tomography (CT) angiography scan of the coronary arteries of a 49-year-old man. This is a left anterior oblique view. This scan was done to evaluate the health of the coronary arteries (the arteries that supply blood to the heart). The arteries are the right coronary artery (left), and the left coronary artery (right) and its branches. All the arteries shown are in good health with no stenosis (narrowing).