Table 1.

Experiment results on deformation fields downsampled either by a factor of two or eight in each dimension. Shown are the classification accuracy of AdaBoost (AB), Random Forest (RF), and support vector machine (SVM) compared to the proposed voxel-wise displacement classifier (VDC). For each case, the downsampling factor is indicated as a suffix to the method name.

Experiment	AB-2	AB-8	RF-2	RF-8	SVM-2	SVM-8	VDC-2	VDC-8
5 Youngest vs. 5 Oldest	0.40	0.50	0.90	0.70	0.70	0.70	1.00	1.00
11 Youngest vs. 11 Oldest	0.5	0.64	0.64	0.41	0.50	0.50	0.96	0.96
All MS vs. All Controls	0.60	0.56	0.62	0.64	0.50	0.51	0.73	0.76
SPMS vs. Controls	0.56	0.88	0.63	0.63	0.44	0.38	0.88	0.88
RRMS vs. Controls	0.48	0.54	0.52	0.48	0.41	0.41	0.77	0.79