A list of the top 5 features identified to reliably differentiate poor from improved survival in patients with GBM from the training set for every tumor subcompartment (necrosis, enhancing tumor, peritumoral T2/FLAIR hyperintensity, and nonenhancing tumor)
| No. | Feature Family | Descriptor | Window Size | MRI Sequence | Statistic |
|---|---|---|---|---|---|
| Top 5 features selected from necrosis | |||||
| 1 | Laws | Edge-edge-level | 5 | T1 | Skewness |
| 2 | Laws | Level-level-level | 3 | T1 | Skewness |
| 3 | Laws | Wave-wave-level | 5 | FLAIR | Median |
| 4 | CoLIAGe | Sum variance | 3 | FLAIR | Skewness |
| 5 | CoLIAGe | Sum variance | 3 | FLAIR | Kurtosis |
| Top 5 features selected from enhancing tumor | |||||
| 1 | CoLIAGe | Sum average | 3 | T2 | Median |
| 2 | CoLIAGe | Sum average | 5 | T2 | Median |
| 3 | CoLIAGe | Energy | 3 | FLAIR | Median |
| 4 | CoLIAGe | Sum average | 3 | FLAIR | Median |
| 5 | Laws | Spot-level-ripple | 5 | T1 | Skewness |
| Top 5 features selected from edema and nonenhancing tumor | |||||
| 1 | Laws | Level-edge-level | 5 | T1 | Median |
| 2 | CoLIAGe | Sum variance | 5 | T2 | Variance |
| 3 | CoLIAGe | Sum variance | 5 | T2 | Skewness |
| 4 | Haralick | Sum entropy | 5 | FLAIR | Skewness |
| 5 | Gabor | –θ = 1.178, XZ –θ = 0, λ = 1.482, BW = 1 | 5 | T2 | Kurtosis |
Note:—BW indicates bandwidth.