CT scan of brain

CT examination of the brain is a method of examining the brain by CT. Head CT is a convenient, rapid, safe, painless, non-invasive new examination method that clearly shows the anatomical relationship of different cross sections of the brain and the specific brain tissue structure. Therefore, the detection rate of the lesion and the accuracy of the diagnosis are greatly improved. In general, CT is better for soft tissue imaging than for soft tissue. Head CT examination is important for the diagnosis of most diseases of the brain, skull, and scalp (including trauma, tumor, inflammation, vascular disease, poisoning, degeneration, and metabolic diseases). Basic Information Specialist Category: Neurological Classification: CT Applicable gender: whether men and women apply fasting: fasting Tips: Fasting 4 hours before scanning. Do not take metal-containing drugs one week before the abdominal scan, do not do gastrointestinal angiography. Normal value In the case of no intracranial lesions, the data of various intracranial examinations were normal. Clinical significance Abnormal result 1. CT is the most important imaging diagnosis method in head trauma. It is sensitive to fresh bleeding and can show important lesions such as edema and increased intracranial pressure and secondary cerebral palsy. It is also suitable for the diagnosis of skull fractures, especially depressions. Fractures and skull base fractures. 2, can clearly show the number of intracranial tumors, size, contour density, intratumoral hemorrhage, calcification and the degree of diffusion qualitative diagnosis of up to 70%. 3. Accurate diagnosis of cerebrovascular diseases and help to determine treatment options. 4, the brain injury can distinguish the size, shape, range of hematoma and its adjacent brain tissue compression. The diagnostic accuracy rate can reach more than 98%, which can be used for routine examination of craniocerebral injury. Need to check the crowd Patients with cerebral hemorrhage, cerebral infarction, subarachnoid hemorrhage, and craniocerebral injury. Precautions Contraindications before examination: fasting 4 hours before scanning. If you have symptoms of hypoglycemia such as dizziness and cold sweat while waiting for the test, you can drink sugar. Do not take metal-containing drugs one week before the abdominal scan, do not do gastrointestinal angiography. Before the inspection, bring the inspection materials that have been done, such as B-ultrasound and X-ray photos. Requirements for inspection: 1. Thoracic and abdominal scanning may require the patient to belching, and should actively cooperate with the doctor during the examination. 2. Do not move your body during the scan. 3. Iodine angiography may be used in the scan. Those who are allergic to iodine and penicillin should take the initiative to explain. 4. The patient does not have to be afraid to be alone in the examination room during the scan because the medical staff is closely watching you in the next room. Inspection process Brain CT examination The CT scan of the brain is usually taken in the supine position. The positioning piece is scanned first, then the scanning range is determined, and then the transverse position scanning is performed. The baseline used for scanning is mostly the hearing line (ie the connection between the external malleolus and the external auditory canal) or the eyebrow line (ie the line connecting the midpoint of the upper edge of the eyebrow to the external auditory canal). Both sides should be symmetrical, scanning up from the baseline to the cranial apex. It is usually scanned continuously with a layer thickness of 10 mm, and the examination of lesions at special sites is performed by a thin layer scan of 5 mm or less. Usually a CT scan is performed first, that is, a CT scan without contrast agent injection. Coronal scanning is also commonly used in CT examination of the brain. It is the best position for displaying pituitary microadenomas, usually with a layer thickness of 2-3MM; the saddle area, temporal lobe lesion and cerebellar border junction, cerebral hemispherical convex lesions need to be supplemented with Coronal scanning helps to better display. Not suitable for the crowd 1. Serious heart, liver and kidney failure. 2. Allergic to iodine contrast agents. Adverse reactions and risks May cause delayed allergic reactions.