Correlation Between RMI of Degenerative Disk Disease and Reduction of Pain After Disk-infiltration Treatments

Inclusion Criteria: * Age ⩾ 18 years. * Chronic growing lumbago with duration \> 3 mois. * Disabling lumbago with an average ⩾ 4/10 defined by numerical scale. * Common chronic low back pain that has been evolving for more than 3 months. * Disabling lumbalgia defined by an average numerical scale greater than or equal to 4/10 in the month preceding the inclusion. * Failure or intolerance to drug treatments (nonsteroidal anti-inflammatory drugs and systemic corticosteroids). * Absence of biological inflammatory syndrome. * Recent MRI of less than 6 months with active disc disease (Modic 1) defined by degenerative disc disease associated with mirror rearrangements of the subchondral bone of the adjacent vertebral endplates in hyposignal T1 and hypersignal T2. * Signed informed consent obtained. * Affiliation to social security. Exclusion Criteria: * Pregnancy woman. * Immunosuppression. * History of allergy to iodinated contrast agents and / or prednisolone acetate. * Local or general infection. * Fever (temperature\> 38). * History of disc surgery of less than 6 months. * History of infectious spondylodiscitis. * Unbalanced psychiatric disorders. * Severe coagulation disorders or impossible cessation of anticoagulation or anti platelet aggregation. * Impossibility to obtain signed consent form. * Patient under guardianship and/or curatorship.