text: Most imaging tests have not been able to localize recurrent prostate cancer when the PSA is mildly increased. Axumin scans were compared to [C]-tagged choline PET scans, another FDA approved PET scan that can assist in this situation, and to biopsy results. Fluciclovine tagged PET scans appear to more sensitive than CT scans and to [C]-tagged choline PET scans.