CT colonography is an imaging technique that enables both two-dimensional (2D) and three-dimensional (3D) evaluation of the colon [1-3]. Although debate continues regarding which rendering technique should be used for primary evaluation, the techniques (2D and 3D) are complementary, each increasing the value of CT for colonic lumen evaluation. Two-dimensional CT colonography, when used as the primary imaging technique, may be advantageous in that data may be evaluated in a more time-efficient fashion [2, 3]. When a potential filling defect is identified on 2D CT colonography, 3D imaging is used to determine whether its morphology is linear (interhaustral fold) or polypoid (stool or polyp) [2, 3].