64-slice spiral CT scan

64-slice spiral CT is a new method for diagnosing coronary heart disease, which is not inferior to coronary angiography. The biggest advantage is that it is non-invasive. The patient can clearly display the stereoscopic image of the coronary artery by intravenous injection of 60-80 ml of developer. It is characterized by a high negative predictive value, that is, 64-slice spiral CT is normal, and coronary angiography will be normal. Another advantage is that the price is much lower than coronary angiography. It can be used to check the occurrence and development of coronary atherosclerosis. It can also compare the effects before and after drug treatment. The biggest disadvantage is that when a severe coronary artery stenosis is found, it is necessary to perform an interventional treatment after coronary angiography for renal function damage, and the developer may cause an increase in damage. Basic Information Specialist Category: Cardiovascular Examination Category: CT Applicable gender: whether men and women apply fasting: not fasting Tips: Remove the inspection area including underwear with metal materials and various items: headwear, hair clips, earrings, necklaces, jade, coins, belts and keys. Normal value To quantify the tissue's absorption rate for X-rays, Hounsfield defines a new scale "CT value." The CT values ​​of different tissues vary, and each fluctuates within a certain range. The CT value of the bone is the highest, 1000HU, the CT value of soft tissue is 20~70HU, the CT value of water is 0 (±10) HU, the CT value of fat is -50~-100, and the CT value of air is -1000HU. Clinical significance 64-row spiral CT is still the most advanced instrument for diagnosing cardiovascular and cerebrovascular diseases in the world. Its unique non-invasive, high-efficiency, accurate and stereoscopic medical medical imaging technology examines the stenosis of the arteries, the morphology of the bridges and stents, and There is great superiority in heart function analysis. It achieves a non-invasive examination of the coronary arteries, providing a safe, rapid, and inexpensive method of screening for screening and diagnosis of coronary heart disease. In addition, 64-slice spiral CT can not only perform morphological diagnosis, but also can be used for functional imaging diagnosis, such as the application of brain perfusion imaging, which can display cerebral ischemia in the early stage. In particular, the scanning speed is fast. 64-slice spiral CT has unique advantages in the diagnosis of emergency medicine and early pulmonary embolism. It can also be used to screen coronary heart disease, lung cancer, cirrhosis, and analyze benign and malignant tumors. Suitable for the population 1. For the purpose of medical examination. Middle-aged and elderly people over the age of 40, who have coronary heart disease risk factors, in order to understand the coronary atherosclerosis, for future comparison. 2. Used to identify treatment. For the inability to rule out coronary heart disease, it is necessary to distinguish it from menopausal syndrome (clinical heart) or biliary heart syndrome or neck syndrome. In order to confirm the diagnosis, a 64-row spiral CT is required. 3. Those who need surgery for valvular heart disease, who are preparing for coronary artery bypass surgery, those who have old myocardial infarction complicated with ventricular wall pain are required to undergo surgery. 64-slice spiral CT examination should be performed to understand the coronary artery condition. Precautions Taboo before inspection: 1. Before the examination, the CT doctor should be informed of the detailed medical history and various examination results. If you have your own saved X-ray film, magnetic resonance film and previous CT film, you need to submit it to CT doctor for reference. 2, to explain to the doctor whether there is drug allergy, whether it has asthma, urticaria and other allergic diseases. 3, remove the inspection site clothing including underwear with metal materials and various items: such as headwear, hairpins, earrings, necklaces, jade, coins, belts and keys. 4, need to enhance the person before fasting for 4 hours. 5, if CT enhanced scan or children, unconscious, need to be accompanied by healthy people. 6, CT enhanced scan If you use ion contrast agent, you need to do intravenous injection of iodine allergy test, no response after 20 minutes, before you can check. 7, do not take heavy metal drugs within 1 week, do not do gastrointestinal tincture examination. Patients who have been tested for expectorant need to wait for the sputum to empty; if they are eager to have a CT examination, they should be treated with a cleansing enema or oral laxative to sputum. Requirements for inspection: 1. Obey the instructions of the technicians during the inspection, keep the position and do not move, and cooperate with the examination to calmly breathe, hold your breath, do not swallow, and do not blink your eyes. 2. The CT machine is equipped with a walkie-talkie. If there is any discomfort during the examination or an abnormal situation occurs, the doctor should be informed immediately. Inspection process The heart rate needs to be controlled at 70 beats/min or less, and the beta rate is generally controlled in the CT room. Contrast was performed after intravenous injection of 60 to 80 ml of the developer. Not suitable for the crowd Inappropriate people: patients with premature beats and atrial fibrillation should not perform this test.