MRI is not physically harmful to infants, but MRI examinations are long and difficult for infants to cooperate with, and infants need to be sedated and accompanied by family members before the examination. MRI has the unique advantages of no ionizing radiation (radiation) damage, no bone artifacts, multi-directional (cross-sectional, coronal, sagittal, etc.) and multi-parameter imaging, high soft-tissue resolution, and the ability to show vascular structures without the need to use contrast agents. Contraindications for MRI: pregnant women within 3 months of pregnancy, people with magnet-like substances in their bodies, such as those with pacemakers, aneurysms and other vascular surgeries, artificial valves, and those with metal foreign bodies left next to vital organs. Before the MRI examination, it is necessary to pay attention to: do not bring metal on the child and family members in the examination room. MRI examination time is long, and the patient is in the relief of darkness, noise, under the guidance of the physician to maintain the appropriate position, infants and young children should be accompanied by family members to carry out the examination.