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Image noise by reconstruction. Image noise was measured at two parenchymal sites, two colonic air column sites, and two fat attenuation sites and was averaged overall. Note that the RD-PICCS and RD-MBIR series had the lowest noise at every site, and overall. The noise was statistically lower on these series compared to the other low dose series (RD-FBP, RD-ASIR) but also compared to the standard dose series (FBP std).
