Physical Today, And I'm Sooo Glad It's Only Once A Year

[stephen]

There is a virtual colonoscopy you can have at some teaching hospitals that uses advanced imaging. It is not as good as a real one but it is vastly better than your current course of action. The big downside is they can't take tissue samples, so you may still have to have one if they find something.

http://en.wikipedia.org/wiki/Virtual_colonoscopy