Magnetic resonance imaging examination has no radiation to the human body, no harm, and there is no precedent to prove that magnetic resonance examination will produce harm to the human body, but the scanning area of magnetic resonance is a powerful magnetic field, there are many precautions required to cooperate with the patient in order to ensure the safety of the patient examination, as follows: 1, magnetic resonance examination, when entering the scanning room, must remove all metal objects from the body, including cell phones, keys If the patient has metal implants in the body, he or she must also communicate with the supervising technologist or physician that the metal implants in the body, some of which are MRI-compatible but some are not, must allow the physician to judge whether he or she can enter the magnetic field or undergo this MRI-type examination. If it is said that forcing entry between the magnets for scanning can lead to artifacts, such as pacemakers, metal frames for aneurysms, and if the physician is not told in advance, it can pose a great danger to the safety of the examination. So the MRI itself does not harm the patient in any way. However, it is important to remove any metal objects from the body before entering the magnetic field. In addition, it is important to communicate any metal implants in the body to the physician before conducting the examination.