Here in Canada I think you need a PSA of over 0.4 to get a good reading on the PSMA PET scan . Our PSA tests in Canada is the ultra sensitive one. Last one for me was 0.056 , prior to that I had 0.072 . I cant see what I did different . I have had surgery and 22 sessions of EBRT ( no hormones or chemicals) about 2 years after surgery. Had surgery 3 years ago. I feel well , and go hiking 4-6 times a week here on Vancouver Island . God Bless to all !