Table 3.
Texture parameters: number of excitations 1 vs 4
| 1 (n = 36) | 4 (n = 44) | P‐value | Q‐value | |||
|---|---|---|---|---|---|---|
| Mean | SD | Mean | SD | |||
| Histogram | ||||||
| Mean | 249.6 | 2.3 | 247.5 | 2.8 | 0.001 | 0.003 |
| Median | 249.5 | 6.0 | 244.8 | 6.8 | 0.002 | 0.005 |
| STD | 24.3 | 4.2 | 27.7 | 4.9 | 0.002 | 0.005 |
| Range | 11.4 | 2.3 | 10.0 | 2.7 | 0.013 | 0.022 |
| Geometric mean | 248.8 | 0.38 | 248.5 | 0.45 | 0.002 | 0.005 |
| Harmonic mean | 247.6 | 0.69 | 247.1 | 0.83 | 0.003 | 0.006 |
| 2nd STD | 3.9 | 0.78 | 3.4 | 0.93 | 0.013 | 0.022 |
| STD5 | 4.8 | 1.0 | 4.2 | 1.1 | 0.028 | 0.045 |
| STD9 | 5.7 | 1.3 | 5.2 | 1.4 | 0.107 | 0.146 |
| 4th moment | 1257285.5 | 1220668.6 | 2269343.1 | 1656035.4 | 0.003 | 0.006 |
| IQR | 35.1 | 5.0 | 39.4 | 6.2 | 0.001 | 0.003 |
| Entropy | 7.2 | 0.48 | 7.1 | 0.29 | 0.413 | 0.502 |
| GLCM | ||||||
| Entropy | 3.0 | 0.61 | 2.4 | 0.69 | 0.0001 | 0.001 |
| Contrast | 23.1 | 7.7 | 18.3 | 8.5 | 0.010 | 0.018 |
| Correlation | 0.89 | 0.04 | 0.92 | 0.05 | 0.005 | 0.009 |
| Energy | 0.005 | 0.002 | 0.008 | 0.004 | <0.0001 | 0.001 |
| Homogeneity | 0.49 | 0.06 | 0.54 | 0.07 | 0.002 | 0.005 |
| GLRL | ||||||
| SRE | 0.07 | 0.04 | 0.11 | 0.05 | 0.001 | 0.003 |
| LRE | 0.07 | 0.04 | 0.11 | 0.05 | 0.0004 | 0.002 |
| GLN | 0.07 | 0.04 | 0.10 | 0.05 | 0.001 | 0.003 |
| RLN | 0.07 | 0.04 | 0.11 | 0.05 | 0.001 | 0.003 |
| RP | 211.7 | 63.2 | 180.9 | 66.2 | 0.038 | 0.055 |
| LGRE | 212.3 | 63.5 | 179.6 | 66.9 | 0.029 | 0.045 |
| HGRE | 214.4 | 62.7 | 184.2 | 65.3 | 0.040 | 0.056 |
| SRLGE | 212.1 | 64.1 | 179.2 | 67.8 | 0.030 | 0.045 |
| SRHGE | 3842.0 | 1316.4 | 2549.7 | 1735.8 | 0.0004 | 0.002 |
| LRLGE | 4431.0 | 1453.1 | 2988.9 | 1914.6 | 0.0004 | 0.002 |
| LRHGE | 3845.2 | 1318.9 | 2569.7 | 1738.3 | 0.001 | 0.003 |
| Law's features | ||||||
| L1 | 194138.1 | 8172.2 | 193770.3 | 8258.3 | 0.843 | 0.843 |
| L2 | 17098.3 | 1319.8 | 16808.4 | 1211.3 | 0.310 | 0.388 |
| L3 | 6323.2 | 406.3 | 6304.5 | 380.0 | 0.832 | 0.843 |
| L4 | 38727.6 | 2029.3 | 38384.9 | 2147.6 | 0.469 | 0.555 |
| L5 | 5002.1 | 517.8 | 4929.7 | 427.0 | 0.495 | 0.571 |
| L6 | 4142.0 | 409.5 | 4111.7 | 308.3 | 0.707 | 0.758 |
| L7 | 3072.6 | 210.6 | 3091.9 | 170.2 | 0.651 | 0.715 |
| L8 | 9678.2 | 1135.5 | 9574.5 | 872.1 | 0.645 | 0.715 |
| L9 | 18972.1 | 1287.3 | 18650.3 | 1373.0 | 0.287 | 0.369 |
| GLGM | ||||||
| MGR | 16.2 | 1.9 | 12.7 | 4.0 | <0.0001 | 0.001 |
| VGR | 12135.7 | 1227.1 | 9640.4 | 2842.2 | <0.0001 | 0.001 |
| Skewness | 7.9 | 0.5 | 9.3 | 1.6 | <0.0001 | 0.001 |
| Kurtosis | 67.2 | 9.0 | 94.6 | 32.2 | <0.0001 | 0.001 |
| Mean skewness | 0.03 | 0.64 | 0.54 | 0.75 | 0.002 | 0.005 |
| Mean kurtosis | 2.7 | 0.63 | 3.1 | 0.58 | 0.004 | 0.008 |
| Mean laws | 303992.7 | 14617.7 | 303027.0 | 14279.6 | 0.767 | 0.803 |
Mean texture analysis features with variations in number of excitations (NEX). n: number of contoured slices; STD: standard deviation; STD5: 5‐neighborhood standard deviation; STD9: 9‐neighborhood standard deviation; IQR: indicates interquartile range; GLCM: gray‐level co‐occurrence matrix; GLRL: gray‐level run length; SRLGE: short‐run low gray‐level emphasis; SRHGE: short‐run high gray‐level emphasis; GLGM: gray‐level gradient matrix; SRE: short‐run emphasis; LRE: long‐run emphasis; GLN: gray‐level nonuniformity; RLN: run‐length nonuniformity; RP: run percentage; LGRE: low gray‐level run emphasis; HGRE: high gray‐level run emphasis; SRLGE: short‐run low gray‐level emphasis; SRHGE: short‐run high gray‐level emphasis; LRLGE: long‐run low gray‐level emphasis; LRHGE: long‐run high gray‐level emphasis; MGR: mean gradients; VGR: variance of gradients.
Bold indicates statistically significant as determined with the two‐tailed t‐test and false detection analyses (Q < 0.05).