Measures of image-rating agreement and consistency across the 2 raters and the expert neuroradiologist read using different acquisition timesa
↵a Rank order agreement is shown in blue; intra-/interrater agreement across image ratings is shown in green. The correspondence of confidence scores to the expert neuroradiologist read completed at a standard 20-minute acquisition time is shown in shades of red across the diagonal. The strength of the association is reported by color gradations. Statistically significant associations evident after adjusting for the false discovery rate are shown in bold italicized typeface. The optimal cutoff for rater 1 compared with the expert rating included scans rated as equivocal, while the optimal cutoff for rater 2 compared with expert raters included only those with a probable abnormal finding and above.