There are no reports in the literature that MRI can cause significant harm or disability to the human body, except that it may cause slight discomfort during the examination. The first is that the examination chamber of MRI is long and the space is narrow, and its large and round passage can make patients feel psychological panic. The second is that during the examination, the MRI instrument will emit a harsh noise, which makes patients feel uncomfortable and even uncomfortable. In addition, MRI also has a certain thermal effect, which can generate some heat energy and cause discomfort to the human body. If there are built-in objects in the patient’s body, such as vascular stents or pacemakers, the examination can cause greater harm or even life-threatening. Before the MRI examination, the doctor should fully inform the patient of the precautions to be taken during the examination.