Barium enemas on the cover of Radiology!

Makes a change from virtual colonoscopy :-)

Unlike other authors, this group found that in their series, technical errors were more common than perceptual errors, and the majority of missed polyps were in the proximal colon.

Thompson, Foster, Paulson et al
Causes of Errors in Polyp Detection at Air-Contrast Barium Enema Examination
Radiology April 2006;239:139-148.