Table 2.

Optimal biomarker set with 9 selected features extracted from middle shell and constituting texture properties

1	Kurtosis from uniform LBP with radius 3 and neighborhood 8
2	Kurtosis from uniform LBP with radius 3 and neighborhood 12
3	Median from contrast GLCM with window size 3x3 at 360° angle, bins 5, and radius 3
4	Median from contrast GLCM with window size 5x5 at 360° angle, bins 5, and radius 3
5	High quartile from correlation GLCM with window size 7x7 at 270° angle, bins 5, and radius 2
6	High quartile from contrast GLCM with window size 3x3 at 45° angle, bins 5, and radius 3
7	High quartile from contrast GLCM with window size 5x5 at 45° angle, bins 5, and radius 3
8	High quartile from correlation GLCM with window size 7x7 at 270° angle, bins 5, and radius 3
9	High quartile from contrast GLCM with window size 5x5 at 45° angle, bins 10, and radius 3

GLCM, grey level cooccurrence matrix; LBP, local binary pattern.