5 New contributions of the thesis: - Evaluate the role of axial loaded magnetic resonance imaging in the diagnosis of degenerative lumbar spinal stenosis: increased clinical symptoms, decreased in spinal canal size through anteroposterior diameter, dural sac cross-section area, the thickening of the ligamentum flavum, and disc bulge on axial loaded magnetic resonance imaging compared with conventional magnetic resonance imaging statistically significant difference p < 0, 001.