Fig. 3
From: Electronic cleansing of tagged residue in CT colonography: what radiologists need to know
Pseudopolyps due to particles of untagged faecal residue in the transverse colon. a Endoluminal 3D and (b) axial 2D view after EC, showing multiple small sessile polypoid filling defects (arrows). On corresponding unsubtracted (c) prone and (d) supine 2D views, the filling defects shift with the residual fluid from the dorsal to the anterior section of the transverse colon (arrows). They are not connected to the colonic wall. This is a typical imaging feature of faecal residue