Has anyone ever had a CT scan? I'm going to have one done at 3 today and I'm a little worried. I wasn't at first but then my boss told me that I will be in this tube like thing that is very confined and I can't move...........ummm, is that true?

I'm just supposed to be having my sinuses x-rayed - does my whole body have to go in this thing.......or just my head? :confused: