In fact, magnetic resonance imaging (MRI) used to be called nuclear magnetic resonance imaging, but the “nucleus” is not the nucleus of a nuclear weapon, but the nucleus of a hydrogen atom that resonates in a magnetic field, so it was later changed to magnetic resonance imaging for fear of misunderstanding. This imaging method has many advantages, first of all, there are no X-rays produced by CT or mammogram, so you can have multiple examinations every year according to your condition; in addition, breast MRI can detect most of the early breast cancer lesions, which is more sensitive than any other examinations. However, there are contraindications to MRI, such as pacemakers and claustrophobic patients, metal objects cannot be brought into the examination room, and other precautions should be taken in consultation with the doctor on duty.