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Vista scanner projection images from (a) a 1.6 cm diameter scattering finger-gelatin phantom, (b) a 5 cm diameter scattering finger-gelatin phantom, and (c) a scattering solution -filled jar phantom. (d) Vista mean attenuation value versus scatter concentration, measured within the scattering finger region-of-interest for the different phantoms, indicating the range of approximately linear behavior for each size of scattering region. Some of the error bars are smaller than symbol size
