The main danger of brain CT is that there is some radiation damage. Brain CT can be used to assist in the diagnosis of brain hemorrhage, brain tumors and other central nervous system diseases. There is a certain amount of radiation damage in brain CT examination, but in fact the dose of radiation is very small, and the general examination will not affect human health; if repeatedly checking CT there is a possibility that it may cause radioactive damage, such as radioactive myelitis, and so on. Pregnant women, lactating women, renal insufficiency, coronary heart disease, arrhythmia and other patients should be careful to choose to do brain CT. For brain CT examination, you need to go to the neurology department or neurosurgery department of the hospital. Doctors will judge whether the examination is necessary according to the patient’s condition.