Figure 2: A, D, and G are parts of 18F-FDG PET/CT and C, F, and H are parts of 18F-NaF PET/CT. B and E are transverse sections of low-dose CT. Abnormal uptake of 18F-NaF is shown at the right rib and right ilium, whereas no abnormal concentration of 18F-FDG is found (arrows). The lesions are verified as osseous metastases by CT follow-up.