Fig. 8
From: Electronic cleansing of tagged residue in CT colonography: what radiologists need to know
Pseudodefects of haustral folds, submerged under tagged residual fluid after EC. a On endoluminal 3D views, a horizontal fluid layer is found in the transverse colon, obscuring parts of the colonic wall before EC (arrowhead). Only those parts of the colon wall and haustral folds that lie above the fluid layer are visible. b On sagittal 2D views, thin haustral folds are submerged under tagged residual fluid (arrow). c, d After EC, the residual fluid is removed. Note that the submerged parts of haustral folds show defects, disappearing entirely (arrow), while those parts of the haustral folds that are not submerged do not change in appearance on (c) endoluminal 3D views and (d) sagittal 2D views