Meta-analysis of data from studies of CT colonography suggests that it has excellent per-
patient average sensitivity and average specificity for detection of adenomatous polyps and
cancer. However, while its potential as a screening test is undoubted, there are several
current limitations that will need to be overcome before it can be considered seriously by
health policy makers. These revolve around issues of generalisability, which is inhibited
most by a lack of trained observers and access to CT scanners, and a paucity of data …