It was later found that TSPO targeted imaging could be utilized for the imaging of non-neuronal inflammatory diseases such as rheumatoid arthritis (RA), atherosclerosis, Takayasu arteritis (TAK), systemic lupus erythematosus (SLE), and GCA (88, 94, 98–100, 103, 106, 185, 190, 193). This evidence concerns the gene TSPO and rheumatoid arthritis.