An MRI of the lumbar spine is much better than a CT of the lumbar spine after suffering from lumbar prolapse. For the diagnosis of lumbar prolapse, MRI can show more. Although CT examination of the lumbar spine can also detect lumbar prolapse and can determine the specific segment and degree of lumbar prolapse. However, there is no way to detect the extent of damage to the spinal cord and nerve roots of the lumbar spine. MRI can solve the problem of detecting damage to the spinal cord and nerve roots of the lumbar spine, and MRI of the lumbar spine can also detect whether there are soft tissue tumors growing in the spinal canal, so it is better to do MRI after a lumbar dislocation.