Posted 7/8/2016 12:10 PM (GMT -6)
At least 2 for the F18 PET - and it only detects bone mets. about the same for the C11 Choline. Some of the scans in clinical trials (e.g., Ga-68-PSMA, fluciclovine, F18-DCFPyl and F18-DCFBC) can get it lower, but the lower the PSA, the less reliable it will be. CT scans can provide some confirmation of what the bone scans or PET scans detect as "suspicious."
But, more importantly, what would be the purpose of such a scan for you, and what would you do differently if it came out one way or another?