FIGURE 4. Confirmation of polyp on poorly-distended colonic segment.
Supine 2D CTC images (A and B) show long-segment collapse of the sigmoid colon, largely obscuring a 15-mm polyp (arrows), which is easily identified on the alternate position (C and D). This proved to be a tubular adenoma after resection at OC (E).
(From reference 5, with permission)