Difference Between Brain MRI and Brain CT

The difference between brain MRI and brain CT is that the imaging principle of the two is different. Brain MRI is to use the influence of magnetic field on water particles in the human body and then image, brain CT is to form images on the computer after the attenuation of rays passing through the human body, so the imaging principle of the two is different. Brain MRI is sensitive to ischemic cerebrovascular diseases, especially acute cerebral infarction, which can be developed in 2 hours, but brain MRI is not particularly sensitive to hemorrhagic diseases. At present, there are many hospitals with magnetic susceptibility imaging, which has high sensitivity to cerebral hemorrhage. CT examination of the brain is commonly used clinically. After the patient has sudden neurological deficit, head CT should be examined first to exclude hemorrhagic disease. Further, brain MRI can be examined to determine cerebral infarction or intracranial space-occupying disease. Both MRI and CT can be enhanced to further determine the nature of the lesion.