1. Those who have magnet-like substances in their bodies, such as pacemakers and artificial valves, and those who have metal foreign body residues beside important organs, etc., are not allowed to do this examination. However, the implanted objects in the body are confirmed by the surgeon to be non-magnetic objects that can be examined by magnetic resonance. 2, to explain to the technician the following situations: whether there is a history of surgery; whether there is any metal or magnetic material implanted in the body, including metal birth control rings, etc.; whether there are dentures, electronic ears, prosthetic eyes, etc.; whether there is drug allergy; whether there is any metal foreign body splashed into the body in the near future. 3, do not wear underwear with metal substances, check the head and neck of the patient should be washed the day before the examination, do not rub any hair care products. 4. Before the examination, take off all clothes except underwear and put on the special clothes for examination in the MRI room. Remove all metal items such as necklaces, earrings, watches and rings. Remove cosmetics, dentures, eye prostheses, eyeglasses and other items from your face. 5.Provide the doctor with all medical history, examination data and all X-ray films, CT films, previous MRI films, etc. before the examination. 6.Abdominal (liver, spleen, kidney, pancreas, biliary tract, ureter, etc.) examiners should fast for 4 hours before the examination and inject one 654-2 before the examination. 7, magnetic resonance urography (MRU) before the examination of oral 20mg tachyphylaxis. 8, to do magnetic resonance examination should be ideologically prepared, do not be anxious, afraid, to listen to the physician’s guidance, patience and cooperation Magnetic resonance application of a wide range of cranial brain, spinal cord and other diseases is now the most effective diagnostic imaging methods. It can detect tumors, cerebral infarction, cerebral hemorrhage, brain abscess, cerebral cysticercosis and congenital cerebral vascular malformation at an early stage, and can also determine the type and cause of hydrocephalus. Magnetic resonance imaging is unique in showing congenital anomalies of the spinal cord, spinal cord cavernous disease and sclerosis, and push tube scarring. MRI is also very clear in showing disc prolapse, degenerative lesions, etc., and the compression of nerve roots by disc prolapse can also be shown clearly. Magnetic resonance imaging can outline the heart’s atrial and ventricular septum, heart valves and myocardium. Therefore, congenital heart disease and various kinds of cardiomyopathy are all adaptable to magnetic resonance examination. Magnetic resonance can also be used to examine tumors of the uterus, ovary, bladder, and prostate, and can stage cancerous tumors, and tumors of the liver and pancreas can also be clearly shown.