PET's are a great tool in detection with the caveat that they do have a fairly high rate of false positives. When having a scan done being prepared that a hotspot could readily be any number of issues not necessarily cancer is crucial. All these scans, MRI, PET, CT all have issues however their only job is to identify an area of concern for biopsy and then staging if cancer is confirmed.

I say go for the PET just prepare yourself accordingly. Good luck!

Eric