The vertebrae have normal height and marrow signal. L1-2 Level: no herniated nucleus pulpous or significant central spinal canal stenosis. the neural foramina appear essentially patent. the facets appear unremarkable. schmorl node is present in the inferior L1 end- plate L2-3 and L3-4 Levels: no herniated nucleus pulpous or significant central spinal canal stenosis. the neural foramina appears essentially patent. the facets appear unremarkable.L4-5 Level: Posterolateral disc bulge in combination with facet arthropathy narrows the neural foramina.L5-S1 Level: Grade 1 posterolisthesis of L5 on S1. disc herniation effaces the ventral epidural fat. Facet arthropathy narrows the bilateral neural foramina. Post traumatic etiology cannot be excluded.The conus medullaris and paraspinal tissues appear normal. mri report what does it mean? thank you