I just had a 6.4 FDG, 3 months earlier it was 4.4. The radiologist read it as possibly physiological, correlate with exam/symptoms (or something like that). I asked my oncologist at what point is the FDG uptake concerning. He said anything over 5 we check into, but the low numbers aren’t super concerning, if it’s 15-20, there’s definitely a problem. I’m waiting on biopsy results.