Fig. 6.

Scanner Strength Prediction AUROC. AUROC curves for scanner strength prediction in unharmonized (UH), EB harmonized, and FB harmonized imaging features. Means of cross-validation AUROC are shown by green, orange, and blue lines; coverage envelope of one standard deviation of cross-validation AUROC is shown by colored shaded regions. Lower AUROC indicates better performance for this task. Both EB and FB ComBat similarly reduce the AUROC closer to random chance, but there is still some scanner signal left in the harmonized data.