Magnetic resonance injection means to do magnetic resonance enhancement. Although magnetic resonance examination has the advantage of high resolution for soft tissues, and doing most of the scanning can also show most of the lesions more clearly, but the magnetic resonance performance in different diseases or different stages of the disease will be very different, and purely doing the routine scanning of magnetic resonance still can not solve the problem, which needs to be injected in the venous blood vessels of the human body with a kind of magnetic resonance In this case, it is necessary to inject a special contrast agent into the vein of the human body, so that the lesion can be better displayed. At the same time, we can understand the characteristics of the blood supply of the lesion and the pattern of enhancement of the lesion, which is convenient for further analysis and judgment of the lesion, and achieve the purpose of accurate diagnosis.