Table 2.
Selected radiomic features for all folds in a leave-one-out cross-validation (LOOCV) of the primary dataset.
| MRI sequence | Wavelet | Quantization levels | Feature type | Feature name |
|---|---|---|---|---|
| CE-T1 | LLL | — | Intensity | Median |
| CE-T1 | LHL | 8 bit | GLRLM | Run-length variance |
| CE-T1 | LLL | 5 bit | GLSZM | Gray-level non-uniformity normalized |
| CE-T1 | HLL | 7 bit | GLSZM | Gray-level variance |
| CE-T1 | HLL | 7 bit | NGLDM | High dependence low gray-level emphasis |
| T2 | LLL | — | Intensity | Root mean square |
CE-T1: contrast-enhanced T1, L: low-pass filter, H: high-pass filter, GLRLM: gray-level run length matrix, GLSZM: gray-level size zone matrix, NGLDM: neighboring gray-level dependence matrix.