For the examination of lesions in the lumbar spine, MRI is usually better than CT, and it is recommended that patients with physical and economic conditions should prefer MRI, which can help improve the correctness and accuracy of diagnosis. High spatial resolution and other advantages. However, it can produce certain radiation, thus causing certain harm to human body, and is not suitable for pregnant women, infants and other people, and cannot be presented for nerve root compression, spinal cord deformation, vertebral tumors and other conditions, so there are certain limitations. The main method of MRI is to scan the sagittal and coronal planes of patients and then image them at once, which can reflect the lesions of the lumbar spine in a more intuitive and comprehensive way, and can clearly show the anatomical structure of the spine and spinal cord, and can detect situations that cannot be clearly diagnosed by CT examination. And will not cause radioactive damage to the patient’s body, the safety is higher, but there are longer scanning time, higher prices and other shortcomings. In addition, if there are metal implants (except titanium metal) in the patient’s body, it may not be suitable for MRI, and CT examination is usually required.