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. Author manuscript; available in PMC: 2015 Jun 1.
Published in final edited form as: Proc SPIE Int Soc Opt Eng. 2015 Mar 1;9414:94142Y. doi: 10.1117/12.2081284

Figure 1.

Figure 1

The presence of fecal tagging can affect the visual appearance of adjacent tissue. (a) The CTC image of a 17-mm polyp has a substantially higher average internal radiodensity in supine position where it is surrounded by lumen air, than in prone position where the polyp is covered by fecal tagging. (b) In air-filled lumen regions, colon surface can be visualized in high detail, whereas the colon surface covered by fecal tagging can be distorted by artifacts that complicate confident detection of lesions.