The difference between MRI and CT of the lumbar region is mainly in 4 aspects: 1. The direction of diagnosis is different. CT of the lumbar spine and CT of the lumbar intervertebral disc can see the bone structure of the lumbar spine and the condition of the intervertebral disc, and can see the fracture bone fracture, as well as the protrusion, bulge and whether there is occupancy in the spinal canal. The MRI of the lumbar region can see the bone structure of the entire lumbar region as well as other surrounding soft tissues, especially in the diagnosis of soft tissue diseases, which is significantly better than the CT of the lumbar spine. 2, the price of the examination is different. The price of lumbar MRI is much more expensive than that of lumbar CT, about 200-300 yuan. 3, there is a difference in the time to do the examination. It takes about 20-30min to do a lumbar MRI. The lumbar CT is less than 1min, and when doing the MRI, you must not move during the examination, otherwise the image will be blurred. 4. The lumbar MRI has a very small amount of radiation to the human body, while the lumbar CT has a larger amount of radiation.