Fig. 14From: CT colonography: avoiding traps and pitfallsa, b Three-dimensional view of the transverse colon shows a luminal narrowing with a triangular shape: image typical of spasm caused by contraction of the taenia coli (white arrows). Thickened semilunar folds with a smooth aspect causing kissing folds on the corresponding axial image (white arrows). c Sagittal image showing the taenia coli (black arrows) with the triangular luminal narrowingBack to article page