<qa>  What is the name of the site of metastasis?1. Bone metastases will be defined by bone imaging. If the patient has technetium bone scan, andor NaF PET performed, either study may be used for documenting metastases; both scans do not need to show the number of metastases required for study entry. For patients undergoing PSMA PET, only PSMA avid lesions that have a CT or MRI correlate consistent with metastasis will be counted as a site of metastasis. 