Table 4.
Texture parameters: GE vs Siemens
| GE (n = 83) | Siemens (n = 36) | P‐value | Q‐value | |||
|---|---|---|---|---|---|---|
| Mean | SD | Mean | SD | |||
| Histogram | ||||||
| Mean | 245.9 | 1.8 | 249.6 | 2.3 | <0.0001 | 0.0001 |
| Median | 242.0 | 4.5 | 249.5 | 6.0 | <0.0001 | 0.0001 |
| STD | 32.5 | 5.2 | 24.3 | 4.2 | <0.0001 | 0.0001 |
| Range | 9.2 | 1.4 | 11.4 | 2.3 | <0.0001 | 0.0001 |
| Geometric mean | 248.0 | 0.56 | 248.8 | 0.38 | <0.0001 | 0.0001 |
| Harmonic mean | 246.1 | 1.04 | 247.6 | 0.70 | <0.0001 | 0.0001 |
| 2nd STD | 3.2 | 0.48 | 3.9 | 0.78 | <0.0001 | 0.0001 |
| STD5 | 3.6 | 0.56 | 4.8 | 0.96 | <0.0001 | 0.0001 |
| STD9 | 3.5 | 0.54 | 5.7 | 1.3 | <0.0001 | 0.0001 |
| 4th moment | 4384199.1 | 2820540.2 | 1259420.0 | 1216812.6 | <0.0001 | 0.0001 |
| I QR | 41.0 | 3.1 | 35.1 | 5.1 | <0.0001 | 0.0001 |
| Entropy | 7.3 | 0.20 | 7.2 | 0.48 | 0.516 | 0.554 |
| GLCM | ||||||
| Entropy | 2.2 | 0.39 | 3.0 | 0.61 | <0.0001 | 0.0001 |
| Contrast | 16.7 | 4.5 | 23.2 | 7.7 | <0.0001 | 0.0001 |
| Correlation | 0.93 | 0.04 | 0.89 | 0.04 | <0.0001 | 0.0001 |
| Energy | 0.009 | 0.002 | 0.005 | 0.002 | <0.0001 | 0.0001 |
| Homogeneity | 0.57 | 0.02 | 0.49 | 0.06 | <0.0001 | 0.0001 |
| GLRL | ||||||
| SRE | 0.11 | 0.03 | 0.07 | 0.04 | <0.0001 | 0.0001 |
| LRE | 0.11 | 0.03 | 0.07 | 0.04 | <0.0001 | 0.0001 |
| GLN | 0.12 | 0.03 | 0.07 | 0.04 | <0.0001 | 0.0001 |
| RLN | 0.11 | 0.03 | 0.07 | 0.04 | <0.0001 | 0.0001 |
| RP | 144.5 | 19.2 | 212.0 | 63.3 | <0.0001 | 0.0001 |
| LGRE | 141.0 | 20.6 | 212.6 | 63.6 | <0.0001 | 0.0001 |
| HGRE | 139.5 | 20.4 | 214.8 | 62.7 | <0.0001 | 0.0001 |
| SRLGE | 140.6 | 20.5 | 212.5 | 64.2 | <0.0001 | 0.0001 |
| SRHGE | 2037.7 | 592.1 | 3844.4 | 1321.0 | <0.0001 | 0.0001 |
| LRLGE | 2421.5 | 660.9 | 4429.5 | 1460.6 | <0.0001 | 0.0001 |
| LRHGE | 1753.3 | 466.9 | 3845.8 | 1323.4 | <0.0001 | 0.0001 |
| Law's features | ||||||
| L1 | 186793.4 | 33134.5 | 194202.9 | 8099.2 | 0.189 | 0.236 |
| L2 | 17662.7 | 8333.2 | 17104.7 | 1293.8 | 0.691 | 0.707 |
| L3 | 7092.6 | 2150.3 | 6323.8 | 399.1 | 0.036 | 0.049 |
| L4 | 39166.7 | 4904.5 | 38746.2 | 2016.0 | 0.621 | 0.650 |
| L5 | 5836.4 | 4462.7 | 5002.2 | 524.1 | 0.267 | 0.316 |
| L6 | 4712.7 | 3135.9 | 4141.0 | 407.6 | 0.279 | 0.322 |
| L7 | 3724.9 | 2070.2 | 3072.0 | 206.5 | 0.062 | 0.082 |
| L8 | 10812.2 | 5484.5 | 9691.9 | 1184.0 | 0.229 | 0.279 |
| L9 | 17868.8 | 2408.8 | 18978.0 | 1267.0 | 0.010 | 0.014 |
| GLGM | ||||||
| MGR | 14.1 | 8.9 | 16.2 | 1.9 | 0.166 | 0.213 |
| VGR | 11304.8 | 7622.5 | 12137.4 | 1222.2 | 0.517 | 0.554 |
| Skewness | 9.2 | 1.7 | 7.9 | 0.52 | <0.0001 | 0.0001 |
| Kurtosis | 94.3 | 30.4 | 67.2 | 9.0 | <0.0001 | 0.0001 |
| Mean skewness | 0.95 | 0.42 | 0.03 | 0.64 | <0.0001 | 0.0001 |
| Mean kurtosis | 3.2 | 0.47 | 2.7 | 0.67 | <0.0001 | 0.0001 |
| Mean laws | 301700.2 | 63339.7 | 304095.9 | 14624.5 | 0.823 | 0.823 |
Mean texture analysis features based on scanner platform: GE vs Siemens. 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).