How often a patient should have an MRI physical examination of the brain should be analyzed according to the patient’s specific condition.1. If the patient does not have cerebral infarction, cerebral hemorrhage, or brain tumor disease, the MRI examination does not need to be done. Patients who want to have an examination of the head can first have a head CT examination. If the patient has cerebral infarction, cerebral hemorrhage or cerebrovascular disease, it is recommended that the patient should have a head MRI once a year to determine whether the patient is suffering from disease progression and aggravation. 2. If the patient has tumor problems in the brain, it is recommended that the patient should have a head MRI once every three months or six months to clarify whether the patient’s tumor has changed and whether there are new tumors in other parts of the body.