If you understand how the gut populations work, and what foods harm them and the gut walls, you wont need to get scanned. Colonoscopy, while maybe important for people who have symptoms or who have had a bad diet, is harmful. The gut bugs are far more important there than anything our bodies do. If they are happy, everything will be fine. The polyethylene glycol given to people to clean them out before the colonoscopy destroys the gut population. it also reaches the brain, and can do harm there, hopefully only temporarily. If someone really felt they actually needed a colonoscopy, they should ask for a magnesium clean out alternative instead of polyethylene.
I had a couple of colonoscopies and it was actually a pleasant experience for me. The night before, you take a salty solution that really cleans you out after a couple days of low fiber diet. I had just started my new diet (of natural foods) before having my last one and I had a couple of 88% Dark Chocolate bars before my prep. Wow, did that help speed things along.
Then at the procedure, they give you some kind of "twilight" sedation and you don't even remember what happened even though you are awake all during it. Very weird.
Well since my last one, I've put nothing in my body but good foods since so hopefully I have the healthiest gut bacteria out there.