What is difference between colonoscopy and barium enema in terms of information?

Details: During a colonoscopy, it is possible to examine the colon in detail and obtain biopsies or remove the polyps if found. A barium enema, provides an image with relative low resolution. If something is found on the barium enema, a colonoscopy is necessary in order to determine what it is.

Significant : Colonoscopy is a direct look at the lining of the colon vs an indirect x-ray shadow of a barium enema (be). If something is seen on a colonoscopy, it can be treated or biopsied. The be can miss things in the rectum and should include a flex sig to evaluate that area. You are sedated for a colonoscopy. No sedation for a be. Both are acceptable measures for colon cancer screening.