Table 2.
SUV metrics features and Clinical features used in this study.
| Type | Name | Description |
|---|---|---|
| SUV metrics | SUVmax | Maximum SUV of the tumour region |
| SUVpeak | Average of the voxel with maximum SUV within the tumour region and its 26 connected neighbors | |
| SUVmean | Average SUV value of the tumour region | |
| aucCSH | Area under the curve of the cumulative SUV volume histogram describing the percentage of total tumour volume above a percentage threshold of maximum SUV | |
| PercentInactive | Percentage of the tumour region that is inactive. A threshold of 0.005 × (SUVmax)2 followed by closing and opening morphological operations were used to differentiate active and inactive regions on FDG-PET scans | |
|
| ||
| Textures | Global | Variance |
| Skewness | ||
| Kurtosis | ||
| GLCM | Energy | |
| Contrast | ||
| Entropy | ||
| Homogeneity | ||
| Correlation | ||
| SumAverage | ||
| Variance | ||
| Dissimilarity | ||
| AutoCorrelation | ||
|
| ||
| Textures | GLRLM | 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) | ||
| GLV (gray-level variance) | ||
| RLV (run-length variance) | ||
| GLSZM | SZE (small-zone emphasis) | |
| LZE (large-zone emphasis) | ||
| GLN (gray-level nonuniformity) | ||
| ZSN (zone-size nonuniformity) | ||
| ZP (zone percentage) | ||
| LGZE (low gray-level zone emphasis) | ||
| HGZE (high gray-level zone emphasis) | ||
| SZLGE (small-zone low gray-level emphasis) | ||
| SZHGE (small-zone high gray-level emphasis) | ||
| LZLGE (large-zone low gray-level emphasis) | ||
| LZHGE (large-zone high gray-level emphasis) | ||
| GLV (gray-level variance) | ||
| ZSV (zone-size variance) | ||
| NGTDM | Coarseness | |
| Contrast | ||
| Busyness | ||
| Complexity | ||
| Strength | ||
|
| ||
| Clinical | Age | Age |
| Sex | Male | |
| Female | ||
| Treatment | Radiotherapy + surgery + chemotherapy | |
| Radiotherapy + surgery | ||
| Surgery + chemotherapy | ||
| Status | Alive | |
| Alive with disease | ||
| Dead | ||
| Grade | High | |
| Intermediate | ||
| Low | ||
| MSKCC type | Liposarcoma | |
| Leiomyosarcoma | ||
| Synovial sarcoma | ||
| Malignant fibrous histiocytomas | ||
| Extraskeletal bone sarcoma | ||
| Fibrosarcoma | ||
| Other | ||