The difference between magnetic resonance and ct is as follows: 1, the imaging principle is different; 2, the observation effect on imaging imaging is different; 3, the time required for examination is different, magnetic resonance takes longer, ct takes shorter; 4, magnetic resonance for some patients there are contraindicated conditions, there are built-in objects in the body, electronic devices, cochlear implants and other patients are not allowed to enter the magnetic field; 5, the advantages of different items, magnetic resonance for soft tissues, bones have advantages, ct for the lungs, cavity organs have more advantages.