Is prep-free colon screening on the horizon?

3D Virtual Colonoscopy

1 Centimeter

In this 3D reconstruction based on CT scans, or "virtual colonoscopy," a 1-centimeter polyp protrudes from the colon wall.

Image courtesy Michael Zalis, M.D.

Published: July, 2012

New Harvard research offers a glimpse of a future when much of routine colorectal cancer screening will no longer require an aggressive bowel prep to clear the colon. Instead, the colon will be imaged in a CT scan and the stool removed digitally—akin to Photoshopping blemishes from a still photo.

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