Your MRI spine describes the various features of degeneration of spine and vertebral
body. Thecal sac
is the space where roots from spinal cord
comes out which is mildly indented.Hypertrophy facet is thickening and enlargement of joints between veretebra called facets.Modic type2 endplated indicated degeneration of spine.
Your back pain is mainly due to facet hypertrophy and ,thecal sac indentastion.You need to use lumbosacral belt. Consult neurologist
or a neurosurgeon for neuralgic drugs.If syptoms still persisting then go for thecal steroid injection