Baseline BH CT Follow-up BH CT Baseline NBH PET/CT Missed by one reader 14 17.5 12 15.0 13 16.3 Agreed 63 78.8 53 66.3 44 55.0 Disagreed* 3 3.8 4 5.0 0 0.0 Agreed no nodules** 0 0.0 11 13.8 23 28.8 *Disagreement of size occurred only when size difference greater than 1mm was read **Agreement between readers on studies which contained no pulmonary nodules

Table 6: Distribution of agreement between first and second reader among scan that had two readers.