Have you taken a PET scan? If so, was it "negative"?

[redo]

I am awaiting the results of my PET scan. I am wondering if anyone (surely there must be) who've taken a PET scan and had it come out without any obvious signs of illness? If you have, about when did you take the scan?

(The machines have gotten more sensitive, so perhaps an old "negative" PET scan doesn't mean there's nothing to find.)