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Fig. 1A —18-mm sessile villotubular adenoma of rectum in 59-year-old
woman. Transverse images of 72-second delay IV contrast-enhanced CT
colonography in supine position at wide window setting (width, 1,500 H; level,
–400 H) (A) and at soft-tissue window setting (width, 400 H;
level, 20 H) (B) show sessile lesion (arrow) in rectum. Lesion
had lowest attenuation value of 50 H among 48 polyps. At blinded review, all
four reviewers correctly interpreted polyp.
