Radiology has seen dramatic technological advances in recent years. This multi-author text describes the current approach to colonic imaging and provides a detailed insight into likely future developments. The role of radiology in cancer screening is fully considered. In this context, particular attention is devoted to CT and MR virtual colonography, which, it is anticipated, will largely replace barium enema radiology and reduce the use of diagnostic colonoscopy. Modern cancer staging techniques, including PET scanning, are reviewed, and post-treatment follow-up strategies are examined. The...