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Bar graphs show relative frequencies of Lung CT Screening Reporting and Data System (Lung-RADS) classifications for (a) manual measurements, (b) semiautomated average diameter measurements, and (c) semiautomated volume measurements, according to sizes originally reported by clinical radiologists. Number of study reads (in parentheses) for each nodule size category equals number of nodules in category multiplied by three study readers or reads.
