Since MRI uses an applied magnetic field, patients should first remove metal objects from their bodies before the examination, such as metal buckles on clothes, belts, watches and other metal objects, etc. For movable dentures, they should also be removed. For items that cannot be removed, such as pacemakers or steel plates on the body, such patients should never do MRI examinations, which will be dangerous to the patients, and for dentures that cannot be removed, it is necessary to decide whether the MRI examinations can be done according to the metal material of the dentures. After the patient is prepared, he/she can be brought into the MRI room by the technician. According to the examination area, the doctor will choose the appropriate coil for him/her and then perform the scan, and the scanning time will be different according to the scanning area.