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. Author manuscript; available in PMC: 2014 Jan 1.
Published in final edited form as: Radiol Clin North Am. 2013 Jan;51(1):69–88. doi: 10.1016/j.rcl.2012.09.005

FIGURE 1. Tagged adherent stool simulating a sessile polyp on 3D.

FIGURE 1

FIGURE 1

FIGURE 1

3D endoluminal CTC image (A) shows a polypoid lesion, as well as smaller adjacent diminutive foci. Both 3D translucency rendering (B) and 2D correlation (C) show dense internal contrast tagging, easily excluding a polyp. Note that the adherent stool is nondependent on this prone 2D view, which could simulate a true lesion if untagged.

(From Pickhardt PJ, Kim DH. Potential pitfalls at CTC Interpretation, In: CT colonography: principles and practice of virtual colonoscopy. Philadelphia: Saunders; 2010, with permission)