Multifidus PET Scan Study

"Patient eligible for the study and have provided consent will have a baseline PET scan. Multifidus ReActiv8 Stimulator will be inserted using standard treatment for lumbar pain at Barts Health NHS Hospitals.~All patients who receive the Reactiv8 system will continue to receive multifidus stimulation 20Hz for the next 6 months as per standard of care of multifidus stimulation; at the end of this period, the patients will undergo PET scanning and questionnaires. Thereafter, stimulation will continue and 3rd PET scan will be performed at 1year post implant."