What Is a Brain CT Scan?

The CT examination of the brain is a method of examining the brain by CT. Skull CT is a convenient, fast, safe, painless, and non-invasive new examination method. It can clearly show the anatomical relationship of different cross sections of the brain and the specific brain tissue structure. Therefore, the detection rate of the lesions and the accuracy of the diagnosis are greatly improved. Generally speaking, CT imaging of human hard tissue is better than soft tissue. Skull CT examination is of great significance for the diagnosis of most diseases in the skull, skull, scalp (including trauma, tumor, inflammation, vascular disease, poisoning, degeneration and metabolic diseases, etc.).

Name: Brain CT examination

category: Computed tomography computed tomography

Normal brain CT examination

No intracranial lesions occurred, and all intracranial examination data were normal.

Clinical significance of craniocerebral CT examination

Abnormal results: (1) CT is the most important imaging diagnostic method in head trauma. It is highly sensitive to fresh bleeding and can show important lesions such as edema and increased intracranial pressure secondary to brain hernia. CT is also suitable for diagnosis of the skull Fractures, especially sunken and skull base fractures. (2) It can clearly show the number, location, size, contour, density, intracranial hemorrhage, calcification, and spread of intracranial tumors. The probability of qualitative diagnosis is as high as 70% -80%. (3) Accurate diagnosis of cerebrovascular diseases and help determine treatment options. (4) Distinguish the size, shape, scope, number of hematomas and the compression of adjacent brain tissues for craniocerebral injury. Observing the presence of subacute or chronic intracranial hematomas, judging the absorption and shrinkage of craniocerebral injury, it can also show sequelae such as cerebral softening, cerebral atrophy, hydrocephalus and perforation of the brain. Can replace painful examinations such as qi brain ventricle angiography. The diagnostic accuracy rate can reach more than 98%, which can be used as a routine examination of craniocerebral injury. People to be checked: patients with cerebral hemorrhage, cerebral infarction, subarachnoid hemorrhage, and brain injury

Craniocerebral CT examination precautions

Unsuitable people: It is not suitable for young children to perform this test. Taboo before the test: fast for 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 water. Do not eat metal-containing drugs a week before abdominal scans, and do not perform gastrointestinal imaging. Bring the inspection materials you have done before the inspection, such as ultrasounds and X-ray photos. Requirements during the examination: (1) Thoracic and abdominal scanning may require patients to breathe out, and they should actively cooperate with the doctor during the examination. (2) Do not move your body while scanning. (3) Iodine contrast may be used in the scan, and those with allergies to iodine and penicillin should take the initiative to explain.

Cranial brain CT examination process

Cranial brain CT scan technique The brain CT scan usually takes the supine position, first scan the positioning film, then determine the scan range, and then perform a transverse scan. The baseline used for the scan is mostly the auditory canal line (that is, the line connecting the outer canal and the external auditory canal) or the eyebrow line (that is, the line between the middle point of the upper edge of the eyebrows and the external auditory canal). The sides should be symmetrical, scanning from the baseline up to the top of the skull. Normally, continuous scanning with a layer thickness of 10MM is used. Examination of lesions in special parts uses thin-layer scanning below 5MM. CT scan is usually performed first, that is, CT scan without injection of contrast agent. Coronary scans are also commonly used in craniocerebral CT examinations. In order to show the optimal position of pituitary microadenomas, layer thicknesses of 2-3MM are usually used; saddle areas, temporal lobe lesions, the junction of the cerebellum and the cerebral hemisphere lesions need to be supplemented by Coronal scanning helps better display.

Brain CT examination related diseases

Intracranial hypotension syndrome, hemorrhagic cerebral infarction, neuroechinocytosis, cerebral infarction, multilocular hydatid disease, pediatric external hydrocephalus, early infantile epilepsy encephalopathy, postcranial fossa hydrocephalus in children Sign, chronic subdural hematoma in children, subdural hematoma in children

Brain CT examination related symptoms

Angle arch reversal, throat cramps, faintness, heavy head sensation, tightness in the head, cold hands and feet, dizziness, shortness of breath, sweating and wind, weakness, convulsions, thickened arachnoid

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