CT can detect lumbar spinal stenosis.CT can not only determine whether there is spinal stenosis and the degree of spinal stenosis, but also analyze the cause of spinal stenosis. For example, lesions of bone origin lead to spinal stenosis, such as huge osteophytes, resulting in spinal stenosis. MRI focuses on spinal stenosis of soft tissue origin, such as spinal stenosis caused by tumors and tuberculosis, and MRI is better. MRI and CT have mutual advantages and complement each other in diagnosing spinal stenosis, especially in complex cases, when analyzing the cause of the disease, CT and MRI should be done at the same time, and both of them should be analyzed together and combined with each other in order to make a better diagnosis.