MRI examination is called magnetic resonance imaging in medicine, which is to place the human body in a special magnetic field, using radio frequency and pulse to excite the hydrogen nucleus in the human body, causing the hydrogen nucleus to resonate and absorb energy, and after stopping the radio frequency and pulse, the signal is then processed and imaged by an electronic computer, so as to achieve the purpose of diagnosing diseases. The amount of information obtained by magnetic resonance is much greater than that of other imaging techniques, and it can obtain individual cross-sectional images without the need for contrast injection or ionizing radiation, which has no adverse effects on the body. Magnetic resonance has great advantages in the examination of brain lesions, spinal lesions, liver lesions and other lesions of multiple organs of the whole body.