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Protocol C: Graph shows CTDIvol versus user-selected Noise Index for CTA, BONE, C+, and C− clinical mode in thorax ATVS-activated acquisitions of the 5-year-old phantom. Association between CTDIvol and Noise Index was determined using polynomial fitting as NI = aM × CNR−bM. αM/bM, R2 fitting parameters for all phantoms, and anatomical regions are tabulated in Table S4, Supplemental Digital Content, http://links.lww.com/RLI/A419.
