MRI has no ionizing radiation and does not damage the human body, so patients do not need to worry when they have an MRI. Magnetic resonance is also called MRI, when hearing MRI, people will immediately consider the problem of radiation, but in the study of MRI, it is found that nuclear magnetism mainly refers to the magnetic nucleus with a positive charge to generate a magnetic field by spin, and the signal is generated by the excitation of radio frequency pulse in the applied magnetic field, which is detected by the detector and input to the computer, and after processing and conversion, the image is displayed on the screen, which can make cross-sectional, coronal and sagittal images for the radiologist’s diagnosis. The entire examination process does not involve radiation. MRI, as an advanced imaging technology, has been fully popularized at home and abroad, mainly through the magnetic field and radiofrequency pulses to carry out special examinations, which has the characteristics of safety and accuracy, making it widely and effectively used in clinical disease examination.