CT generally refers to coronary angiography. Coronary angiography is the diagnosis of coronary artery disease by utilizing spiral CT scanning after intravenous injection of contrast material to determine plaque within the walls of the arteries. Coronary artery disease, known as coronary atherosclerotic heart disease, is a common cardiovascular disease in which atherosclerosis occurs in the coronary arteries causing narrowing or occlusion of the lumen of the coronary arteries, leading to myocardial ischemia, hypoxia, or necrosis. Therefore, after coronary angiography, the degree of coronary artery lumen stenosis and wall calcification can be seen, which is also meaningful in determining the extent and nature of plaque distribution within the wall. Coronary CT is an intravenous injection of contrast material, the use of spiral CT scanning and then computerized three-dimensional reconstruction of the coronary arteries of the heart. However, coronary angiography still has some limitations in determining the degree of stenosis, and other relevant examinations need to be improved to make a clear diagnosis. If you are suffering from coronary heart disease, you should consult a doctor in time and follow the doctor’s instructions for examination and treatment.