Table 2.

3D contour-focused segmentation. Number and percentage of stable features with good (0.75 ≤ ICC < 0.9) and excellent (ICC ≥ 0.9) interobserver reliability grouped according to feature class and image type. GLCM, gray-level cooccurrence matrix; GLDM, gray-level dependence matrix; GLRLM, gray-level run length matrix; GLSZM, gray-level size zone matrix; ICC, intraclass correlation coefficient; LoG, Laplacian of Gaussian

3D	Feature class	Image type	Total features (n)	ICC ≥ 0.75 (n)	ICC ≥ 0.75 (%)	ICC ≥ 0.90 (n)	ICC ≥ 0.90 (%)
CT	First order	LoG	72	64	88.89	44	61.11
		Original	18	14	77.78	9	50.00
		Wavelet	144	114	79.17	93	64.58
	GLCM	LoG	88	86	97.73	65	73.86
		Original	22	22	100.00	19	86.36
		Wavelet	176	169	96.02	153	86.93
	GLDM	LoG	56	50	89.29	24	42.86
		Original	14	13	92.86	8	57.14
		Wavelet	112	98	87.50	71	63.39
	GLRLM	LoG	64	62	96.88	30	46.88
		Original	16	14	87.50	9	56.25
		Wavelet	128	112	87.50	86	67.19
	GLSZM	LoG	64	46	71.88	19	29.69
		Original	16	11	68.75	2	12.50
		Wavelet	128	93	72.66	67	52.34
	Shape	Original	14	12	85.71	7	50.00
	Overall		1132	980	86.57	706	62.37
T1w	First order	LoG	72	67	93.06	43	59.72
		Original	18	12	66.67	7	38.89
		Wavelet	144	121	84.03	89	61.81
	GLCM	LoG	88	77	87.50	47	53.41
		Original	22	16	72.73	10	45.45
		Wavelet	176	151	85.80	125	71.02
	GLDM	LoG	56	42	75.00	24	42.86
		Original	14	9	64.29	7	50.00
		Wavelet	112	85	75.89	60	53.57
	GLRLM	LoG	64	50	78.13	31	48.44
		Original	16	9	56.25	6	37.50
		Wavelet	128	99	77.34	77	60.16
	GLSZM	LoG	64	47	73.44	21	32.81
		Original	16	10	62.50	5	31.25
		Wavelet	128	97	75.78	55	42.97
	Shape	Original	14	14	100.00	11	78.57
	Overall		1132	906	80.04	618	54.59
T2w	First order	LoG	72	70	97.22	53	73.61
		Original	18	17	94.44	11	61.11
		Wavelet	144	126	87.50	94	65.28
	GLCM	LoG	88	81	92.05	69	78.41
		Original	22	21	95.45	15	68.18
		Wavelet	176	169	96.02	145	82.39
	GLDM	LoG	56	55	98.21	41	73.21
		Original	14	14	100.00	9	64.29
		Wavelet	112	106	94.64	73	65.18
	GLRLM	LoG	64	64	100.00	53	82.81
		Original	16	16	100.00	11	68.75
		Wavelet	128	122	95.31	92	71.88
	GLSZM	LoG	64	62	96.88	46	71.88
		Original	16	16	100.00	11	68.75
		Wavelet	128	122	95.31	70	54.69
	Shape	Original	14	14	100.00	9	64.29
	Overall		1132	1075	94.97	802	70.85