hi. I am recently had the full body scan. It did not cover the colon. We have a strong family history of colon cancer, so I was very specific in my questions about coverage of this area. However, the place where I had the Full Body Scan also offered a virtual colonoscopy, which is a lot less invasive that the regular colonoscopy, but still gives you a lot of gas. Hope this helps, and that your place where you get a Full Body Scan offers the Virtual Colon test for polyps.
Regular CT Scan is not very effective at detecting colon polyps and or tumors. However, there is a new CT Scan called the "virtual colonosopy" which is a CT Scan but they epty the colon, and open it up with air (contrast) to more effectively view the wall of the colon. Ask your doctor about this scan, I am sure he will be familiar with it.
If you have a virtual colonoscpy and they discover polyps you will then have to have a colonscopy to remove the polyps which will double your expense. I have a 7 year old who is having a colonoscpy done the 19th we are doing the prep now his Doctor ruled out the virtial colonscopy because they are expecting to find polyps.