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Fig. 1 | Insights into Imaging

Fig. 1

From: Electronic cleansing of tagged residue in CT colonography: what radiologists need to know

Fig. 1

Sessile polyp in the ascending colon, submerged entirely under tagged residual fluid. a Axial 2D view shows a sessile polyp (arrow) with a homogeneous soft tissue attenuation within the tagged hyper-dense fluid. b In the corresponding endoluminal view, only a horizontal fluid layer is seen (arrowheads). c After EC, the tagged fluid is subtracted from the 2D view. d The polyp also becomes visible on endoluminal 3D views and presents with a round shape and a smooth surface (arrow). A linear artefact often occurs at the air-fluid interface (arrowheads). It helps to identify parts of the colon wall that were originally submerged. Note that the haustral folds are preserved

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