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Fig. 3I —Scatterplots of SD values in filter-processed and unprocessed
low-dose images (50 mAs) show three groups of regions of interest (ROIs) at
levels of lung apices (A–C), aortic arch (D–F), left
ventricle (G–I), and lung bases at diaphragmatic dome
(J–L). Right–left ROI at level of left ventricle.
