Radiation Oncology

Table 3 The values of r _s between textural features and local 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	0.522	0.001	0.603	<0.001	0.469	0.002
	5	0.421	0.007	0.496	0.001	0.356	0.024
	10	0.389	0.013	0.489	0.001	0.334	0.035
IDM	1	−0.504	0.001	−0.605	<0.001	−0.451	0.003
	5	−0.528	<0.001	−0.571	<0.001	−0.494	0.001
	10	−0.462	0.003	−0.528	<0.001	−0.402	0.010
Contrast	1	0.588	<0.001	0.640	<0.001	0.644	<0.001
	5	0.593	<0.001	0.629	<0.001	0.613	<0.001
	10	0.603	<0.001	0.642	<0.001	0.584	<0.001
Variance	1	0.519	0.001	0.525	0.001	0.594	<0.001
	5	0.538	<0.001	0.538	<0.001	0.599	<0.001
	10	0.464	0.003	0.477	0.002	0.549	<0.001
Correlation	1	−0.473	0.002	−0.585	<0.001	−0.458	0.003
	5	−0.565	<0.001	−0.633	<0.001	−0.492	0.001
	10	−0.561	<0.001	−0.605	<0.001	−0.430	0.006
Entropy	1	−0.467	0.002	−0.527	<0.001	−0.470	0.002
	5	−0.447	0.004	−0.529	<0.001	−0.437	0.005
	10	−0.443	0.004	−0.534	<0.001	−0.418	0.007

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

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