Radiation Oncology

Table 2 The values of r _s between textural features and global gamma passing rates

From: Texture analysis on the edge-enhanced fluence of VMAT

		2%/2 mm		1%/2 mm		2%/1 mm
	d	r _s	p	r _s	p	r _s	p
ASM	1	0.373	0.018	0.623	<0.001	0.174	0.282
	5	0.400	0.011	0.569	<0.001	0.133	0.415
	10	0.381	0.015	0.571	<0.001	0.187	0.249
IDM	1	−0.610	<0.001	−0.690	<0.001	−0.503	0.001
	5	−0.582	<0.001	−0.713	<0.001	−0.417	0.007
	10	−0.540	<0.001	−0.668	<0.001	−0.362	0.022
Contrast	1	0.546	<0.001	0.744	<0.001	0.487	0.001
	5	0.570	<0.001	0.725	<0.001	0.450	0.004
	10	0.554	<0.001	0.740	<0.001	0.402	0.010
Variance	1	0.486	0.001	0.623	<0.001	0.485	0.002
	5	0.507	0.001	0.630	<0.001	0.490	0.001
	10	0.486	0.001	0.587	<0.001	0.530	<0.001
Correlation	1	−0.390	0.013	−0.648	<0.001	−0.279	0.082
	5	−0.486	0.001	−0.678	<0.001	−0.247	0.125
	10	−0.374	0.017	−0.633	<0.001	−0.093	0.569
Entropy	1	−0.303	0.057	−0.581	<0.001	−0.210	0.194
	5	−0.363	0.021	−0.594	<0.001	−0.201	0.213
	10	−0.312	0.050	−0.597	<0.001	−0.200	0.216

Abbreviations: d = particular displacement distance, r_s = Spearman’s rank correlation coefficient, ASM = angular second moment, IDM = inverse difference moment.

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