I am a long term smoker and because of this, I joined a study. The first few years that I got the CT scan nothing was found. This year, they found a spot 2cm on my lung. They want me to wait 6-12 months to do another CT scan. Is this wise? My doctor says I should just wait because radiation is bad for you. I am going nuts here! 2cm sounds really big to me!! Should I get a second opinion as to waiting 6-12 months? Thank you