The body can not remove other metal foreign objects, such as metal internal fixation, artificial joints, metal dentures, stents, silver clips, shrapnel, and other metal deposits, for the examination of the relative contraindications, must be examined, it should be closely observed, in order to prevent the examination of metal in the strong magnetic field to move and damage the neighboring large blood vessels and important tissues, resulting in serious consequences. If there is no special necessity, generally do not accept nuclear magnetic **** vibration examination. The NMR is a very important part of the process, but it is also a very important part of the process, because it is a very important part of the process.
As for the scanning time, according to the part, the condition of the disease, the instrument and so on have a relationship, it is difficult to say how long it will take, fast ten minutes, slow to nearly 1 hour or even longer.