A Unified Framework for Brain Segmentation in MR Images

Table 1

The Kappa index for the 18 volumes on the BrainWeb database with different Rician noise levels and 20% inhomogeneity.

Methods	White matter (%)					Grey matter (%)
Noise level	0	1	5	7	9	0	1	3	5	7	9
EM	86.1	91.5	92.2	90.1	86.4	83.1	90.8	92.5	92	89.1	84.2
SPM 5	91.05	94.2	93.6	90.2	86.3	91.2	93.4	93.3	92.1	90	86.6
HMC	97.8	97.7	93.9	92.3	91.7	97	96.5	95.1	93.7	91.6	90.3
Fast	97.4	96.8	94.8	94.3	91.9	96	95.8	95.3	93.8	91.5	91.1
FCM	97	96	92	88	84	97	96	94	91	87	83
NL-FCM	95.6	94.2	91.5	89.8	83.2	95.4	94.1	93.8	92.9	89.9	79.3
Proposed method	97	95	94.9	94.4	92.2	95.9	95.7	95.3	93.8	92.1	91.2