Patient 28 in Table 1: Images of a 65-year-old man with biochemically recurrent prostate cancer post RP (PSA, 29.3 ng/mL; Gleason score 3+5). A, 18F-NaF PET/CT maximum intensity projection. B, 18F-FDG PET/CT maximum intensity projection. C, Fused 18F-NaF PET/CT. D, Fused 18F-FDG PET/CT. 18F-NaF PET/CT demonstrated randomly distributed osseous metastases. However, only the lesion in left posterior ilium was concordantly active on 18F-FDG PET/CT (arrows). The patient was started on docetaxel with a subsequent fall in serum PSA level to 4.25 ng/mL at 3 months after PET/CT scans.