I just wanted to reassure everyone Who,s going for a virtual colonoscopy c.t scan, I had one today, it was painless,  nothing like a colonoscopy, I had no pain, just a feeling of fullness, like eating a big meal, the tube is tiny and they ask you if you are comfortable all the time, you are only in the scanner for about 2 minutes, I also had the contrast injection which just makes you feel warm and the  bowel relaxent, which didnt really have any effect on me, I really wish I hadn't worried about it, it's nothing to worry about.