Observational Study
Copyright ©The Author(s) 2024.
World J Gastrointest Oncol. Apr 15, 2024; 16(4): 1309-1318
Published online Apr 15, 2024. doi: 10.4251/wjgo.v16.i4.1309
Table 2 The 3D texture features of magnetic resonance images
Extraction method
Parameters
Grayscale histogram (9)Mean, variance, skewness, kurtosis, and percentiles (1%, 10%, 50%, 90%, and 99%)
Grayscale co-occurrence matrix (55)Angular second order distance, correlation, contrast, entropy, entropy sum, square sum, mean sum, mean difference, inverse distance, entropy difference, standard deviation
Grayscale gradient (5)Average gradient, gradient variance, gradient skewness, gradient kurtosis, non-zero gradient
Long run matrices (25)(Horizontal, vertical, 0°, 45°, 135°) Run length non-uniformity, gray value non-uniformity, long run enhancement, short run enhancement, fractional run