Fig. 7

18F-NaF PET images of a 77-year-old female (weight 63 kg). Maximum intensity projection (MIP) and axial PET images reconstructed by a, c OSEM (2 iterations) and b, d BPL (β value, 400), respectively. The hotspots of osteoblastic activity in MIP images (a, b) show the degenerative bone changes and bone bruises