Table 2. Distribution of the top 25 radiomics features according to weight after relief feature screening.
| Weight rank | Feature category | Feature name | Feature weight |
|---|---|---|---|
| 1 | NGLDM | Contrast | 0.0317 |
| 2 | NGLDM | Correlation | 0.0310 |
| 3 | NGLDM | Cluster Shade | 0.0290 |
| 4 | Wavelet feature | Ed (Energy Diagonal) | 0.0290 |
| 5 | Wavelet feature | Ev (Energy Vertical) | 0.0257 |
| 6 | GLRLM | SRLGLE (Short Run Low Gray-Level Emphasis) | 0.0248 |
| 7 | GLRLM | GLNU (Gray-Level Nonuniformity) | 0.0248 |
| 8 | GLRLM | HGLRE (High Gray-Level Run Emphasis) | 0.0246 |
| 9 | GLRLM | SRHGLE (Short Run High Gray-Level Emphasis) | 0.0233 |
| 10 | GLRLM | RP (Run Percentage) | 0.0230 |
| 11 | GLRLM | LRLGLE (Long Run Low Gray-Level Emphasis) | 0.0223 |
| 12 | GLRLM | LRHGLE (Long Run High Gray-Level Emphasis) | 0.0223 |
| 13 | GLRLM | LGLRE (Low Gray-Level Run Emphasis) | 0.0223 |
| 14 | GLCM | Correlation | 0.0222 |
| 15 | Gray-level feature | Entropy | 0.0220 |
| 16 | Gray-level feature | Skewness | 0.0218 |
| 17 | Gray-level feature | Kurtosis | 0.0208 |
| 18 | Gray-level feature | Variance | 0.0207 |
| 19 | GLCM | Homogeneity | 0.0207 |
| 20 | GLCM | Cluster shade | 0.0207 |
| 21 | Gray-level feature | Mean | 0.0202 |
| 22 | GLCM | Inverse difference | 0.0197 |
| 23 | NGLDM | Dissimilarity | 0.0194 |
| 24 | GLRLM | RLNU (Run Length Nonuniformity) | 0.0192 |
| 25 | GLRLM | SRE (Short Run Emphasis) | 0.0192 |
NGLDM, neighborhood gray-level difference matrix; GLRLM, gray-level run-length matrix; GLCM, gray-level cooccurrence matrix; GLRLM, gray-level run-length matrix.