Table 3.
List of radiomic features extracted from FDG PET/CT
| Matrix | Index |
|---|---|
| First-order features | SUVmax |
| SUVmean | |
| Metabolic tumour volume (MTV) | |
| Total lesion glycolysis (TLG) | |
| Shape sphericity | |
| Shape compacity | |
| Discretized Histo Skewness | |
| Discretized Histo Kurtosis | |
| Discretized Histo Entropy Log10 | |
| Discretized Histo Energy | |
| Second-order features | |
| Grey-level co-occurrence matrix (GLCM) | Homogeneity |
| Energy | |
| Contrast | |
| Correlation | |
| Entropy Log10 | |
| Dissimilarity | |
| Higher-order features | |
| Grey-level run length matrix (GLRLM) | Short-run emphasis (SRE) |
| Long-run emphasis (LRE) | |
| Low grey-level run emphasis (LGRE) | |
| High grey-level run emphasis (HGRE) | |
| Short-run low grey-level emphasis (SRLGE) | |
| Short-run high grey-level emphasis (SRHGE) | |
| Long-run low grey-level emphasis (LRLGE) | |
| Long-run high grey-level emphasis (LRHGE) | |
| Grey-level nonuniformity for run (GLNU) | |
| Run length nonuniformity (RLNU) | |
| Run percentage (RP) | |
| Neighbourhood grey-level different matrix (NGLDM) | Coarseness |
| Contrast | |
| Busyness | |
| Grey-level zone length matrix (GLZLM) | Short-zone emphasis (SZE) |
| Long-zone emphasis (LZE) | |
| Low grey-level zone emphasis (LGZE) | |
| High grey-level zone emphasis (HGZE) | |
| Short-zone low grey-level emphasis (SZLGE) | |
| Short-zone high grey-level emphasis (SZHGE) | |
| Long-zone low grey-level emphasis (LZLGE) | |
| Long-zone high grey-level emphasis (LZHGE) | |
| Grey-level nonuniformity for zone (GLNU) | |
| Zone length nonuniformity (ZLNU) | |
| Zone percentage (ZP) | |
FDG PET/CT fluorodeoxyglucose positron emission tomography/computed tomography, SUV standardized uptake value