Coronary CT differs from coronary angiography in the following aspects: 1. price: coronary artery enhancement CT, i.e. coronary CTA, is relatively cheaper, while coronary angiography requires about 3000-4000 yuan; 2. whether hospitalization is required: coronary artery enhancement CT can be done on an outpatient basis, and coronary angiography can also be done on an outpatient basis; 3. process: coronary artery enhancement CT is a non-invasive test, although it requires infusion, but in general it is Non-invasive operation, while coronary angiography requires puncture, radial artery, femoral artery or even brachial artery, is an invasive operation, may be relatively painful for patients; 4, effect: coronary angiography is the gold standard, imaging clarity is better than coronary enhancement CT, but coronary CTA, although not clear, also has advantages, in addition to being able to show the coronary artery situation at the same time can put the abnormal anatomy, coronary angiography can not see things, in the CT film clearly It can also show the abnormal anatomy, which is not visible on the coronary angiography, on the CT film. For example, if you want to do a bridge angiography, you may be able to see where the bridge vessels are by doing CTA, while it may be very complicated to find the bridge vessels in the coronary angiography. In addition, the anatomy of abnormal coronary arteries will be easily seen on coronary enhancement CT, while it is more difficult to see clearly on coronary angiography; 5, examination suitability: coronary enhancement CT is generally recommended for young or suspicious negative patients, some professionals believe that the predictive value of coronary enhancement CT negative is higher, although the patient is suspected of coronary artery disease, but the possibility of negative results, it is recommended to use coronary enhancement CT. For patients with a high probability of coronary artery disease, coronary angiography is recommended to better assess the coronary artery condition and decide the next step of treatment. Coronary enhancement CT has a poor resolution of calcification, and most elderly patients have severe coronary artery calcification, which makes it impossible to see the patient’s lumen, so it is advisable to do coronary angiography.