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Fig. 8. —Graph shows detection rate of polyps in phantoms with and without water for three CT sequences. CT_1 used slice width of 1.25 mm and pitch of 0.75 (dose-length product [DLP], 100%). CT_7 used slice width of 2.5 mm and pitch of 1.5 (DLP, 80%); CT_10 used slice width of 3.75 mm and pitch of 0.75 (DLP, 60%). Black bars = 2D multiplanar reconstruction (MPR) technique, white bars = 2D MPR technique with water, gray bars = fly-through technique, striped bars = fly-through technique with water.