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CT acquisition and analysis. (A) CT scans were acquired from each animal/treatment group/time point. Lung tissue was selected and remaining non-lung tissue excluded; lung was segmented by radiodensity into areas of (B) air (red; −999 to −400 HU), (C) tissue (green; −399.9 to −250 HU), (D) fluid (cyan; −249.9 to −70 HU), and (E) 3D rendering was generated using segmented lung. Images and 3D rendering are representative of data acquired from 6 rats 28 d post NM exposure.
