Table 2. Segmentation performance scores MPRAGE data set.

The table shows the DICE (larger is better) and AVHD (less is better) for the initial SPM 12 and FSL FAST GM segmentations as well as after additional polishing, using either the gradient magnitude or the compositional data method.

	SPM		FAST
	DICEa	AVHDa	DICEa	AVHDa
S02
Init	0.8606	0.7325	0.8869	0.5661
Init + GraMag	0.8613	0.5811	0.8876	0.5162
Init + CoDa	0.8689	0.5693	0.8719	0.5017
S03
Init	0.8398	0.8585	0.8782	0.5835
Init + GraMag	0.8679	0.6031	0.8722	0.5575
Init + CoDa	0.8625	0.5986	0.8723	0.5039
S05
Init	0.8681	0.6350	0.8858	0.5545
Init + GraMag	0.8595	0.5618	0.8770	0.5359
Init + CoDa	0.8796	0.4950	0.8960	0.4601
S06
Init	0.8428	0.7778	0.8633	0.6462
Init + GraMag	0.8624	0.5711	0.8665	0.5848
Init + CoDa	0.8592	0.5880	0.8775	0.5074
S07
Init	0.8945	0.6205	0.8583	0.6925
Init + GraMag	0.8983	0.5281	0.8623	0.6487
Init + CoDa	0.8692	0.5541	0.8248	0.6689

DICE, DICE Coefficient; AVHD, Average Hausdorff Distance; Init, initial segmentation; GraMag, gradient magnitude method; CoDa, compositional data method.

^a After masking of areas affected by artifact in the T2s image.