Table 2.

Segmentation accuracy measures on hydrocephalus data set.

Subject	Dice overlap coefficient				False negative ratio
	Atlas EM	Freesurfer	Hammer	Adaptive	Atlas EM	Freesurfer	Hammer	Adaptive
Moderate 1	0.908	0.884	0.786	0.977	0.151	0.156	0.320	0.015
Moderate 2	0.964	0.929	0.889	0.972	0.050	0.053	0.154	0.038
Moderate 3	0.961	0.930	0.864	0.967	0.040	0.043	0.187	0.023
Moderate 4	0.959	0.911	0.827	0.970	0.056	0.061	0.251	0.026
Moderate 5	0.953	0.889	0.824	0.962	0.051	0.108	0.236	0.030
Moderate 6	0.941	0.890	0.847	0.949	0.063	0.083	0.203	0.035
Moderate 7	0.898	0.753	0.864	0.970	0.163	0.362	0.194	0.026
Moderate 8	0.937	0.923	0.860	0.958	0.106	0.065	0.191	0.073
Moderate 9	0.951	0.922	0.576	0.977	0.080	0.079	0.580	0.022
Mean	0.941	0.892	0.815	0.967	0.084	0.112	0.257	0.032
Marked 1	0.496	Failed*	0.119	0.977	0.670	Failed*	0.936	0.043
Marked 2	0.494	Failed*	0.154	0.962	0.671	Failed*	0.915	0.064
Marked 3	0.561	Failed*	0.111	0.967	0.608	Failed*	0.941	0.046
Marked 4	0.798	0.152	0.190	0.970	0.333	0.917	0.893	0.044
Marked 5	0.863	0.258	0.417	0.981	0.233	0.849	0.731	0.021
Mean	0.642	0.205	0.198	0.971	0.503	0.883	0.883	0.044
Mean (All)	0.835	0.767	0.595	0.968	0.234	0.252	0.481	0.036

^*Algorithm failed due to problems in the skull-stripping step.