 This is an open-label positron emission tomographycomputed tomography PETCT study to investigate the diagnostic performance and evaluation efficacy of 68Ga-BNOTA-PRGD2 in rheumatoid arthritis RA patients. A single dose of nearly 111 MBq 68Ga-BNOTA-PRGD2 40 μg BNOTA-PRGD2 will be intravenously injected into patients with RA. Visual and semiquantitative method will be used to assess the PETCT images. Whole body 18F-FDG PETCT will be performed for comparison. 