The main difference between lumbar spine MRI and CT is that MRI is more detailed and meticulous than CT for soft tissues near the lumbar spine. Lumbar spine MRI mainly uses three-dimensional imaging, not only from the cross-section, sagittal plane, coronal plane three directions to clearly show the spine, intervertebral discs, spinal canal and soft tissues within the spinal canal, but also to help diagnose lumbar spine soft tissue diseases such as herniated lumbar discs, small tumors, free discs, or spinal cord pathology, etc. The examination process does not have X-ray radiation and is less damaging to the body. And there is no X-ray radiation during the examination, which is less damaging to the organism. On the other hand, CT examination is like a bread slice, mainly observing the cross section of lumbar spine. By observing the cross section of the lumbar spine, it is possible to make a preliminary judgment on whether the intervertebral discs are protruding, whether the intervertebral joints are proliferating, and whether the ligamentum flavum is hypertrophied, etc. However, CT can visualize soft tissues. However, the clarity and resolution of CT imaging of soft tissues are low, so if there are lumbar spine soft tissue problems, you need to rely on MRI examination.