Figure 4.
Tc-99m MDP bone scintigraphy SPECT/CT (A and C) and Ga-68 PSMA PET/CT (B and D) images of the same prostate cancer patient. While the rib lesion with increased uptake on bone scan (A) is negative on PSMA PET/CT (B), PSMA PET/CT shows additional uptake on third dorsal vertebra (D) (arrow), which is negative on bone scan (C).