Brain MRI

MRI is a MRI examination of the brain for observing the presence or absence of lesions in the brain. It can be used to determine whether the patient is caused by changes in brain structure. Intracranial tumors often cause epilepsy. MRI has low-grade astrocytes in the brain. The diagnostic rate of cell tumors, ganglia, glioma, arteriovenous malformation and hematoma is extremely high. Basic Information Specialist Category: Neurological Classification: Nuclear Magnetic Resonance Applicable gender: whether men and women apply fasting: not fasting Analysis results: Below normal: Normal value: no Above normal: negative: The normal brain tissue on the mri image, the gray matter boundary is clear, the white matter signal is higher than gray matter on t1wi, the gray matter signal is higher than white matter on t2wi, the brain lobe, sulci, cerebral sulcus, cerebral cistern and ventricle are natural, no deformation And increase or decrease, the center line structure is centered. Positive: Mri plain ischemic cerebral infarction showed flaky or fan-shaped length t1. On the left frontal white matter area, see the large length of T1 long T2 finger edema, local invasion of the body through the corpus callosum to the contralateral side. On the T2WI, the edge of the round lesion in the edema showed a slightly lower signal, and see the small wall nodules, T1WI After enhancement, the wall of the lesion was markedly "flower-like" and the center showed no obvious enhancement. Combined with the age of the patient, the possibility of advanced glioma was the greatest. Tips: Those who install artificial heart pacemakers and nerve stimulators are forbidden to check. It is forbidden to check if there are silver clips in the skull and metal foreign bodies in the eyeball. Normal value The normal brain tissue on the mri image, the gray matter boundary is clear, the white matter signal is higher than gray matter on t1wi, the gray matter signal is higher than white matter on t2wi, the brain lobe, sulci, cerebral sulcus, cerebral cistern and ventricle are natural, no deformation And increase or decrease, the center line structure is centered. Clinical significance Abnormal result Mri plain ischemic cerebral infarction showed flaky or fan-shaped length t1. On the left frontal white matter area, see the large length of T1 long T2 finger edema, local invasion of the body through the corpus callosum to the contralateral side. On the T2WI, the edge of the round lesion in the edema showed a slightly lower signal, and see the small wall nodules, T1WI After enhancement, the wall of the lesion was markedly "flower-like" and the center showed no obvious enhancement. Combined with the age of the patient, the possibility of advanced glioma was the greatest. Various diseases need to be diagnosed in combination with specific conditions. People who need to be examined: the elderly, people with frequent brain pain. Precautions Taboo before inspection: no special contraindications. Requirements for inspection: Check the relaxed mood, follow the doctor's instructions to check, please bring the medical records, X-ray film, CT film, and previous MRI films along with the MRI room for reference. Inspection process Magnetic resonance imaging (MRI) is a new examination technique based on the principle that a magnetic nucleus with a magnetic flux can generate transitions between energy levels under the action of a magnetic field. MRI can help to check the energy state and cerebral blood of the brain of patients with epilepsy. The flow situation is of great value in the diagnosis of degenerative diseases. MRI is realized by the action of external high-frequency magnetic field, which generates signals from the body material to the surrounding environment. The imaging process is similar to image reconstruction and CT, except that MRI does not rely on external auxiliary radiation, absorption and reflection, nor radioactivity. The gamma-assisted radiation of matter in the body is imaged by the interaction of an external magnetic field and an object, and the high-energy magnetic field is harmless to the human body. So MRI is safe. The patient enters the examination room and scans the examination before the MRI examination instrument under the guidance of a doctor. Not suitable for the crowd Inappropriate crowd: 1. Those who install artificial heart pacemakers and nerve stimulators are forbidden to check. 2. It is forbidden to check if there is a silver clip in the skull and a metal foreign object in the eyeball. 3. The ECG monitor cannot enter the MRI examination room. Those who have undergone arterial surgery, have had heart surgery and have an artificial heart valve are forbidden to check. 4, a variety of critically ill patients: such as coma after trauma or accident, irritability, arrhythmia, respiratory insufficiency, constant blood loss and incontinence and so on. 5. Metal objects (such as internal fixed steel nails) cannot be inspected at the inspection site. 6. Pregnant women should be examined carefully. If they are pregnant, please inform the doctor. Adverse reactions and risks High-energy magnetic fields are harmless to the human body, so MRI is safe.