In the proposed study, our aim is to evaluate the uptake of 68Gallium-citrate in patients
with failed joint prosthesis and compare it with that of conventional
18fluorine-fluorodeoxyglucose (18F-FDG) positron emission tomography/computed tomography
(PET/CT) scan. We will perform PET/CT scan with 68Gallium citrate and 18F-FDG in subjects
with failed hip or knee prosthesis. Both 68Gallium-citrate and 18F-FDG scans, done within
24-48 hours from each other, will be performed within 4 weeks before surgical
evaluation/revision of the hardware.