Table 3.
The number of radiomics features in different categories under different image types
| Image type Feature type | Original | Wavelet | LoG | Square | SquareRoot | Exponential | Logarithm |
|---|---|---|---|---|---|---|---|
| Shape-based features | 14 | – | – | – | – | – | – |
| First-order statistics | 18 | 144 | 18 | 18 | 18 | 18 | 18 |
| GLCM | 24 | 192 | 24 | 24 | 24 | 24 | 24 |
| GLDM | 14 | 112 | 14 | 14 | 14 | 14 | 14 |
| GLRLM | 16 | 128 | 16 | 16 | 16 | 16 | 16 |
| GLSZM | 16 | 128 | 16 | 16 | 16 | 16 | 16 |
| NGTDM | 5 | 40 | 5 | 5 | 5 | 5 | 5 |
GLCM, Gray-level co-occurrence matrix; GLDM, Gray-level dependence matrix; GLRLM, Gray-level run length matrix; GLSZM, Gray-level size zone matrix; NGTDM, Neighboring gray tone difference matrix.