Hi Brian,
I was diagnosed with neck cancer two years ago. When I had my 1st CT it showed 4 small nodules on my lungs and one larger one. The large one was calcified so they said that was OK. I was told that the others were too small to biopsy. They didn't light up on my subsequent PET so my doctors told me to have them rechecked in 6 months. As it was explained to me, the modern diagnostic tools (CT, PET, MRI...) are so precise that they will show up things that probably don't mean anything. They said that it was a good probability that nearly everybody that's been exposed to smoke and things like that have these nodules but will never know unless they are having a CT for something else. I've had them checked every 6 months since then and they haven't changed at all. I was just told in November that they no longer need any follow up. I get checked regularly for everything else but these particular nodules are apparently not a problem. It's always good to be cautious and I know how scary it is when they mention anything on your lungs but your doctors may be right. The nodules may be nothing at all as was the case for me. I hope for the best with you also.
Good luck!
Joe