Computed tomography colonography in 2014: An update on technique and indications

Figure 1 Pedunculated polyp submerged by fluid residues. A: Polyp displaying soft-tissue density (arrow) is partially submerged by tagged fluid (asterisk) on an axial prone computed tomography image; B: On electronically cleansed endoluminal view, a polyp with a pedunculated morphology (arrow) is clearly observed; C: On colonoscopy, a pedunculated polyp is detected before resection.

Figure 2 Patient with incomplete colonoscopy due to severe angulation and stricture secondary to diverticular disease of the sigmoid colon. A: On a volume-rendered colon map, a stricture of the sigmoid colon (arrow) and a large filling defect (asterisk) on the medial wall of the descending colon are evident; B: On a coronal image, a large polyp (arrow) of the descending colon is observed.

Figure 3 Non-polypoid lesion (type II-A). A: Non-polypoid lesion (arrow) is observed on an axial image; B: Lesion (arrow) is confirmed on an endoluminal computed tomographic colonography image; C: Colonoscopy confirming the presence of the non-polypoid lesion (arrow).