Table 2.

Statistic summary table of radiologist derived stable features.

Filter	Feature class	Total	Robust	% Robust	Filter	Feature class	Total	Robust	% Robust
Original	First order	24	9	37.5	HLL	First order	24	2	8.3
	Shape	17	2	11.8		GLCM	26	3	11.5
	GLCM	26	0	0.0		GLRLM	16	6	37.5
	GLRLM	16	6	37.5		NGTDM/NGLDM	22	4	18.2
	NGTDM/NGLDM	22	3	13.6		GLSZM	16	3	18.8
	GLSZM	16	2	12.5		IVH	22	3	13.6
	IVH	22	13	59.1
	Total	143	35	24.5		Total	126	21	16.7
LoG	First order	24	2	8.3	LHH	First order	24	2	8.3
	GLCM	26	0	0.0		GLCM	26	0	0.0
	GLRLM	16	2	12.5		GLRLM	16	3	18.8
	NGTDM/NGLDM	22	1	4.5		NGTDM/NGLDM	22	4	18.2
	GLSZM	16	1	6.3		GLSZM	16	3	18.8
	IVH	22	3	13.6		IVH	22	3	13.6
	Total	126	9	7.1		Total	126	15	11.9
HHH	First order	24	6	25.0	LHL	First order	24	5	20.8
	GLCM	26	0	0.0		GLCM	26	3	11.5
	GLRLM	16	4	25.0		GLRLM	16	6	37.5
	NGTDM/NGLDM	22	2	9.1		NGTDM/NGLDM	22	4	18.2
	GLSZM	16	3	18.8		GLSZM	16	3	18.8
	IVH	22	5	22.7		IVH	22	3	13.6
	Total	126	20	15.9		Total	126	24	19.0
HHL	First order	24	8	33.3	LLH	First order	24	2	8.3
	GLCM	26	2	7.7		GLCM	26	0	0.0
	GLRLM	16	6	37.5		GLRLM	16	5	31.3
	NGTDM/NGLDM	22	5	22.7		NGTDM/NGLDM	22	2	9.1
	GLSZM	16	3	18.8		GLSZM	16	2	12.5
	IVH	22	5	22.7		IVH	22	3	13.6
	Total	126	29	23.0		Total	126	14	11.1
HLH	First order	24	5	20.8	LLL	First order	24	5	20.8
	GLCM	26	0	0.0		GLCM	26	0	0.0
	GLRLM	16	3	18.8		GLRLM	16	6	37.5
	NGTDM/NGLDM	22	4	18.2		NGTDM/NGLDM	22	2	9.1
	GLSZM	16	3	18.8		GLSZM	16	2	12.5
	IVH	22	2	9.1		IVH	22	15	68.2
	Total	126	17	13.5		Total	126	30	23.8

Total count of first order, shape, gray-level co-occurrence matrix (GLCM), gray-level run length matrix (GLRLM), neighboring gray tone difference matrix (NGTDM), and neighboring gray-level dependence matrix (NGLDM), gray-level size zone matrix (GLSZM), and IVH features with respective robust features counts are listed. Feature definitions and calculation provided by Computational Environment for Radiological Research (CERR)³⁵, as recommended by the imaging biomarker standardization initiative (IBSI)³⁶.