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Fig. 1B —Polyp, 9 mm in diameter, in 58-year-old man. Three-dimensional CT colonographic image (view from cecum to rectum) obtained during two-way interpretation shows small polyp (arrow). Haustral fold in transverse colon caused blind spot at one-way interpretation. PLS = posterior, left, and superior; IPR = inferior, posterior, and right; PSL = posterior, superior, and left; SAL = superior, anterior, and left; LIP = left, inferior, and posterior; RSA =right, superior, and anterior; ARI = anterior, right, and inferior; AIR =anterior, inferior, and right.