The price of lumbar MRI varies depending on the field strength, commonly 1.5 T and 3.0 T. With a field strength of 1.5 T, a lumbar MRI examination costs about 400-500 yuan, while a 3.0 T lumbar MRI examination costs about 800-1000 yuan. Lumbar MRI can assist in the examination of the following diseases: first, lumbar disc herniation, which can clearly show the nucleus pulposus of the herniated segment into the spinal canal, as well as the degree of spinal nerve compression. Second, lumbar spinal stenosis, which can clearly show the bony stenosis of the central spinal canal and the nerve root canal, and the hypertrophy and calcification of the ligamentum flavum and the posterior longitudinal ligament in the spinal canal. Third, spinal cord nerve degeneration and necrosis can clearly show the ischemic degeneration and necrosis of spinal cord nerves, which can monitor the treatment effect.