Table 1.

Dice similarity coefficients for Brainweb data set with variable noise (20% inhomogeneity).

Noise	Tissues			Structures*
	WM	GM	CSF	WM-CR	GM-CR	CBS	GM-CB	Sub-cortical	Vent	Lesion
1%	0.934	0.917	0.899	0.944	0.919	0.764	0.879	0.756	0.885	0.823
3%	0.927	0.912	0.900	0.937	0.913	0.758	0.877	0.743	0.887	0.812
5%	0.918	0.901	0.898	0.928	0.904	0.746	0.861	0.736	0.885	0.792
7%	0.905	0.889	0.893	0.915	0.891	0.735	0.861	0.720	0.883	0.729
Mean	0.921	0.905	0.898	0.931	0.907	0.751	0.870	0.739	0.885	0.789
Std. Dev.	0.012	0.012	0.003	0.013	0.012	0.013	0.007	0.015	0.002	0.042
Healthy brain	0.919	0.906	0.903	0.936	0.902	0.705	0.842	0.809	0.851	-

^*Cerebrum-GM, cerebellum-GM, cerebrum-WM, and ventricles are denoted as GM-CR, GM-CL, WM-CR, and Vent, respectively. Brainstem grouped with cerebellum-WM is denoted by CBS and putamen, and thalamus and caudate are presented as Sub-cortical.