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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

Supine 2D CTC image (A) in a 350-lb patient shows complete collapse of the sigmoid colon. An equilibrium pressure of 20 mm Hg was utilized for the automated CO₂. Decubitus positioning (B) and increase to 25 mm Hg resulted in good luminal distention of this segment, as shown by frontal (C) and lateral (D) 3D colon maps.

Supine 2D CTC image (A) in a 350-lb patient shows complete collapse of the sigmoid colon. An equilibrium pressure of 20 mm Hg was utilized for the automated CO₂. Decubitus positioning (B) and increase to 25 mm Hg resulted in good luminal distention of this segment, as shown by frontal (C) and lateral (D) 3D colon maps.