MRI is a non-invasive test that is not harmful to the body. Although MRI is an imaging test, it does not work in the same way as CT or X-ray. CT and X-rays are mainly used to image different organs through the different penetration characteristics of X-ray beams, and X-rays will cause some damage to the human body. However, MRI uses an applied magnetic field to affect the hydrogen proton nucleus and make it resonate for imaging, which is not harmful to the human body. MRI is widely used in neurology due to its high image clarity, lack of radioactive damage, and excellent display of neurological lesions. However, it should be noted that patients with metal implants (such as metal dentures, stents, etc.) are prohibited from undergoing this examination. It is also not recommended for patients with claustrophobia. For more information about MRI, please consult your physician.