Table 2.

Accuracy of the four segmentation methods (eMRF, MRF-SVM, atlas-based segmentation and MRF) for each of the 21 segmented brain structures is evaluated using the VOP (top row) for each segmentation and VDP (second row) metrics. The percentage improvement in segmentation accuracy is computed for eMRF versus MRS-SVM, eMRF versus atlas-based segmentation, and eMRF versus MRF. The improvements in VOP and VOD are calculated separately. A ‘+’ sign always means that eMRF method outperforms the other methods for the specific neuroanatomical structure and ‘−’ means that eMRF underperforms.

		CORT	CPED	HC	CPU	GP	ICAP	PAG	INFC	MED	THAL	MIDB
eMRF	VOP (%)	91.10	73.15	86.20	87.62	79.64	73.14	90.26	85.32	91.93	93.53	93.27
	VDP (%)	3.34	8.32	5.56	3.98	7.54	11.05	3.55	5.26	7.12	2.48	2.97
MRS-SVM	VOP (%)	93.46	63.31	83.92	85.72	74.47	63.91	80.90	83.21	90.27	92.07	90.48
	VDP (%)	1.63	11.50	5.87	3.89	11.34	12.66	7.97	7.81	10.03	2.78	3.84
Improvement	VOP (%)	−2.53	15.55	2.71	2.22	6.95	14.44	11.57	2.54	1.84	1.59	3.09
	VDP (%)	104.24	−27.60	−5.33	2.16	−33.51	−12.78	−55.44	−32.64	−28.98	−10.61	−22.57
Atlas-based segmentation	VOP (%)	84.19	64.31	84.07	82.46	68.19	60.83	84.47	75.67	84.24	91.16	88.56
	VDP (%)	12.24	11.76	11.91	11.54	13.51	11.40	11.14	14.87	12.50	11.57	12.47
Improvement	VOP (%)	8.20	13.75	2.54	6.26	16.79	20.25	6.85	12.76	9.12	2.60	5.32
	VDP (%)	72.74	29.20	53.34	65.53	44.16	3.13	68.11	64.60	43.05	78.54	76.18
MRF	VOP (%)	90.77	67.69	87.69	88.46	78.46	73.85	85.38	83.08	86.15	93.08	90.77
	VDP (%)	4.35	12.17	6.96	6.96	7.83	13.04	2.61	4.35	10.43	3.48	4.35
Improvement	VOP (%)	0.36	8.06	−1.70	−0.95	1.50	−0.96	5.71	2.70	6.70	0.49	2.76
	VDP (%)	23.24	31.62	20.08	42.84	3.61	15.31	−36.19	−21.05	31.76	28.58	31.68
		AC	CBLM	VEN	PON	SNR	INTP	OLFB	OPT	TRI	CC	Avg.
eMRF	VOP (%)	50.76	92.68	71.83	80.03	78.98	71.61	82.50	68.67	73.83	65.75	80.09
	VDP (%)	25.55	3.73	16.83	12.49	10.16	26.09	10.79	5.67	7.33	20.57	9.54
MRS-SVM	VOP (%)	25.47	96.29	52.85	74.38	60.79	58.18	91.23	59.25	69.72	57.65	73.69
	VDP (%)	68.49	1.48	24.92	14.30	25.65	62.22	7.85	19.93	17.27	24.28	16.46
Improvement	VOP (%)	99.29	−3.75	35.91	7.60	29.91	23.08	−9.57	15.90	5.89	14.04	8.68
	VDP (%)	62.70	−151.51	32.48	12.65	60.39	58.06	−37.49	71.58	57.57	15.26	42.04
Atlas-based segmentation	VOP (%)	50.99	85.91	67.30	70.68	73.18	75.77	82.19	44.74	59.72	49.55	72.77
	VDP (%)	11.51	12.49	12.40	14.55	12.93	15.23	12.40	12.05	12.36	12.28	12.53
Improvement	VOP (%)	−0.45	7.89	6.73	13.24	7.92	−5.49	0.38	53.49	23.62	32.69	10.05
	VDP (%)	−121.98	70.13	−35.70	14.17	21.41	−71.32	12.98	52.99	40.71	−67.49	23.84
MRF	VOP (%)	55.38	93.08	70.77	73.08	68.46	76.92	84.62	53.08	63.85	71.54	77.91
	VDP (%)	19.13	3.48	19.13	17.39	15.65	13.91	16.52	14.78	10.43	22.61	10.93
Improvement	VOP (%)	−8.35	−0.42	1.50	9.52	15.36	−6.91	−2.50	29.39	15.63	−8.10	2.79
	VDP (%)	−33.54	−7.22	12.04	28.18	35.09	−87.55	34.68	61.68	29.77	9.00	12.71