Fig. 2

Average ROC curves for the classification between ALS and PP using SVM, PCA-SVM, and PCA-LR respectively combined with the ROC curve for a SVM classification between ALS and PP based on the ALS- and PP-specific pattern expression scores as determined by PCA-SVM using a healthy control group and projecting individual ¹⁸F-FDG PET scans onto the ALS- and PP-specific metabolic brain patterns