Although MRI imaging technology has been applied to the clinic for only 20 years or so, it is rapidly because it can provide more valuable information for diagnosis. MRI has the characteristics of no X-ray radiation, clear and delicate imaging, multi-parameter imaging, and large amount of information, which helps to show the location, size, morphology, and structural characteristics of human tissues and organs more visually, and provides medical workers with diagnostic or differential It provides valuable diagnostic information for medical professionals to make a diagnosis or differential diagnosis. However, not all patients need MRI to confirm the diagnosis, and it is not uncommon for MRI examinations to be performed without a diagnosis. Therefore, it is best to consult with a neurologist to determine whether an MRI is needed, as a detailed history and neurological examination are more important to the neurologist. In addition to MRI, CT examinations are often performed, but CT and MRI are two different tests, and each has its own indications.