@brianjarvis ❝PSMA PET scan results will typically show little while on ADT. The lower the PSA, PSMA PET will be “essentially negative.”❞

Yes, that's part of why I'm not getting PSMA-PET right now for routine monitoring. With my PSA undetectable (< 0.01) on ADT+Apalutamide for 4.5 years, it might not show much. Instead, I get a combo of bone scans, CT+contrast, and MRI+contrast, all of which could show growths regardless of whether they express PSA (and even, god forbid, if they're a different type of cancer developing), even though the resolution is a little coarser.

(The other reason is that PSMA-PET is used much more sparingly outside the U.S., since there's little evidence yet that it improves overall survival or progression-free survival, despite its finer resolution. I could ask for one if I had biochemical recurrence — my PSA started rising again — but it's not a routine thing.)