Please remember that what is relevant at a university with guys with significant expertise and oodles of time to spend playing with image reconstruction versus in the community where throughput is essential can make great results turn not so good. Also FYI when you get a ct colongraphy we fill your colon with enought air to make your eyes water oh yeah then there is the radiation. I am hopeful chronic low level radiation is somehow a life extender but that may be wishful thinking on my part. Plus the diprovan you get with a coloscopy. Its nickname is milk of amnesia (its a chalky white liquid). No sedation is given with ct colongraphy you may get glucagon to help with colonic spasm and to minmize movement artifact.