Table 2. Significance features selected after dimensionality reduction.
| Order | Image type | Feature type | Radiomics feature |
|---|---|---|---|
| 1 | Original | Shape | Maximum 3D diameter |
| 2 | Wavelet-LLH | First order | Maximum |
| 3 | Wavelet-LHL | First order | Kurtosis |
| 4 | Wavelet-LHH | First order | Mean |
| 5 | Wavelet-HLH | GLRLM | Long-run emphasis |
| 6 | Wavelet-HHL | First order | Median |
| 7 | Wavelet-HHL | GLSZM | Small-area low-gray-level emphasis |
| 8 | Wavelet-HHH | First order | Maximum |
| 9 | Wavelet-HHH | First order | Mean |
| 10 | Wavelet-HHH | GLRLM | Run percentage |
| 11 | Wavelet-LLL | First order | Maximum |
| 12 | Wavelet-LLL | GLSZM | Size zone nonuniformity |
GLSZM, gray-level size zone matrix; GLRLM, gray-level run-length matrix.