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) | |