The good thing about the new “CT scan-aided” virtual colonoscopy is that they can check your bone density at the same time.  Pain-free with no anesthesia, the 15-minute CT scan of the abdomen creates cross-sectional images of the colon, spine and hip, detecting precancerous polyps and bone-mineral loss.  The bad thing is, you still have to do that nasty “prep!”  Expect to see this scan locally this year.