CT scan of cervical spine

Cervical CT examination has high practical value in cervical degenerative diseases and cervical spine injuries. High-resolution CT can clearly show the shape, structure, disc disease, ligament calcification and ligamentum flavum hypertrophy of the spine, and can clearly show the shape and structure of the cervical nerve root and spinal cord. Cervical CT examination should adopt different positioning measures according to different body shapes to make the shoulders sag, avoiding the adverse effects of shoulder artifacts on the cervical spine structure. Basic Information Specialist Category: Inspection Category: CT Applicable gender: whether men and women apply fasting: not fasting Tips: Inappropriate people: allergic or ionic contrast agents have a history of allergies (such as the use of ionic contrast agents also need to do iodine allergy test). Heart, lung, liver, and kidney dysfunction. Normal value The angiography was normal, the density of the nucleus pulposus was uniform and consistent with the density of the dural sac and the fat layer, and there was no protrusion or deformation. Clinical significance Abnormal results The posterior margin of the disc is parallel to the edge of the plate. When the disc protrudes, the posterior margin of the disc is locally prominent. Because the density of the nucleus is higher than that of the dural sac and fat layer, it is easy on CT. Judge. The area of ​​the herniated disc can be determined by the soft tissue shadow of increased density. The dural sac can be simultaneously indented and deformed by various types of protrusions. The posterior central part is prominent, and the clinical manifestations are symptoms of spinal cord compression; the lateral prominent manifestations are symptoms of nerve root stimulation and compression, and sometimes spinal cord compression symptoms. The severity is not proportional to the CT image. Patients who need to be examined for cervical disc herniation. 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, if CT enhanced scan or children, unconscious, need to be accompanied by healthy people. 5, CT enhanced scan If you use ion contrast agent, you need to do intravenous injection of contrast agent iodine allergy test, no response after 20 minutes, before you can check. 6, 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, the inspection process with the doctor's password to do the action, do not arbitrarily move to ensure the clarity of the angiography. 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 Cervical CT examination should adopt different positioning measures according to different body shapes to make the shoulders sag, avoiding the adverse effects of shoulder artifacts on the cervical spine structure. Under the action of the high voltage generator, the X-ray passes through a certain level of the human body and then reaches the detector. The detector obtains information from different organizations and amplifies the information and converts it into a digital signal through an analog/digital converter. After processing by computer, a matrix of absorption coefficients is formed, and then the digital signal is converted into a video signal by a digital/analog converter, and finally a CT image is obtained. Not suitable for the crowd Inappropriate crowd: 1, allergic constitution or ionic contrast agent allergic history (such as the use of ionic contrast agents also need to do iodine allergy test). 2, heart, lung, liver, kidney dysfunction.