Magnetic resonance and CT are not the same thing, both the working principle and the scope of the examination are not the same, but both are diagnostic imaging equipment, but they have a big difference. First of all, magnetic resonance is the use of hydrogen nuclei in the human body in the magnetic field of the magnetic resonance instrument, resulting in resonance, after a series of electronic computer processing and digital reconstruction technology into a magnetic resonance image; and CT is the use of the principle of X-ray imaging to form an image. Secondly, the two are also different in terms of the main examination of the disease. For example, MRI has a higher diagnostic rate for the examination of soft tissue synovium, muscles, tendons, ligaments, etc.; while CT is more advantageous in observing bones, bleeding and tumors. And then if you do CT for a long time there is some radiation to the human body, while MRI has no radiation.