Cardiac CT imaging is a method of detecting coronary artery disease by looking at the coronary arteries of the heart to see if they are blocked or narrowed. Cardiac CT imaging is called coronary artery enhancement CT, which is performed by leaving an intravenous needle in a peripheral vein, injecting a contrast agent into the vein from the needle, and then the contrast agent in the vein flows back to the heart with the flow of the vein, and then the heart pumps the contrast agent from the aorta to the coronary arteries of the heart, and then a CT image is taken under the developmental situation. This test can clearly show whether there is any stenosis in the three coronary arteries of the heart, and it is a relatively simple outpatient method to detect coronary artery disease, but the overall clarity and accuracy is not as accurate as that of the cardiac angiography done in the hospital. Patients with cardiac discomfort are recommended to be referred to the cardiology department.