Effect of colonic distention on superiority of supine versus prone views in screening computed tomographic colonography

PurposeThe purpose of this study was to evaluate the effect of colonic distention in computed tomographic colonography (CTC).MethodsThere were 3941 adults who underwent CTC with distention by either carbon dioxide (CO2; n=2099) or room air (RA; n=l733). Supine distention and prone distention were prospectively assessed and compared.ResultsWith CO2, distention on the supine view was superior in 72.1% (1514/2099) of the patients; with RA, the prone view was better in 56.8% (984/1733) (P<.0001).ConclusionsWith CO2, the supine data set is more often the superior view, whereas with RA, the prone data set is more often preferred.