Fig. 6
From: Electronic cleansing of tagged residue in CT colonography: what radiologists need to know
Fluid motion artefacts at the interface between tagged residues and air in the descending colon. a Endoluminal 3D view and (b) sagittal 2D view showing stair-step artefacts at the air-fluid layer related to fluid motion in the colonic lumen (arrows). Note that the colonic wall shows no artefacts. c EC is incomplete leading to a grid-like artefact at the air-fluid layer (arrowheads)