Fig. 3a, b.

¹⁸F-fluoride bone PET confirmed the presence and absence of bone metastasis. a The 57-year-old male patient with multiple myeloma had multiple hypermetabolic bone lesions (long arrows) by ¹⁸F-FDG PET (MIP anterior view image). He complained of non-specific pain at the right shoulder and elbow joints. b¹⁸F-fluoride bone PET showed multiple metastatic lesions compatible with hypermetabolic lesions, but no other lesions were found. There was no evidence of bone metastasis at right shoulder or elbow joints areas at 12 months after the bone PET study