1, to be exact, coronary angiography can be done by two means: First, coronary angiography, which is an interventional minimally invasive procedure, basically an arterial puncture with an incision of about 1cm in the hand or leg, and second, CT coronary angiography, which uses CT combined with rapid advancement imaging and digital subtraction technology and computerized three-dimensional reconstruction technology to visualize coronary artery blood flow; 2, the advantages of CT coronary angiography: a, the test can be done on an outpatient basis without hospitalization; b, it is quick and easy; c, the cost is relatively low. The first advantage of CT coronary angiography: a, the test can be completed on an outpatient basis, without hospitalization; b, fast and easy; c, the cost is relatively low, about 1,800 yuan in our hospital; d, non-invasive, only a short time of contrast injection using a high-pressure syringe; e, a high rate of negative diagnosis, that is, the test results say you do not have a problem, it is basically nothing. At the same time, we have to mention the disadvantages of the test: a, poor vascular conditions, can not be high-pressure injection can not be carried out, b, arrhythmia, poor contrast effect, c, if the problem is found, can not be directly coronary artery stent implantation, that is, it can only find the problem, can not solve the problem, once there is a problem also need to be hospitalized for further coronary angiography plus stent implantation; 3, and then coronary artery The advantages of coronary angiography: a, good imaging effect, is the current gold standard for diagnosis of coronary heart disease, false positive and false negative rate are very low, b, once the problem is found, stent implantation can be carried out immediately after the angiography, that is, both can find the problem, but also can quickly solve the problem. Then we talk about its disadvantages: a, although it is minimally invasive, it is still traumatic, b, although it is low risk, it still needs preoperative signature talk, c, the cost is relatively high, a simple coronary angiography in our hospital needs more than 4000 yuan. 4, so we finally concluded: for suspected coronary artery disease, if the degree of suspicion is high, direct coronary angiography, if the degree of suspicion is low, CT coronary angiography can be performed first temporarily. To sum up, which one do you need to choose.