Radioactive after FDG injection????

Since 2005 my wife has had 9 PET Scans. During the first scan I was told that I had to wait in the waiting room. After that I had a meeting with one of the hospital administrators and insisted that I be allowed to stay and they were ok with it. I have been with her for each one since then. Keep in mind that if you have a child that is being scanned, they expect a parent to stay with them so haw dangerous can it be? Also, they do try to limit activity particularly if they are scanning for brain cancer because if the brain is "working or active" it will increase the FDG uptake in the same manner as cancer.