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Experimental setup for CBCT imaging. Left, photograph of the imaging bench, with position of the bowtie filter and cylinder indicated. Right, three phantom configurations hypothesized to yield varying degrees of noise stationarity: (A) air-only; (B) bowtie filter + water cylinder; and (C) water cylinder (without a bowtie filter). The (x, y, z) coordinates of image reconstruction are shown. The relative fluence at the detector is illustrated by [I(u)/Io] for the three configurations.
