Table 5 Results of variability between ROI sizes
Median | ROI size | Model | Train MSE | Train R2 | Test MSE | Test R2 | Feature Selected | Feature Name (Feature class) | Feature Type |
|---|---|---|---|---|---|---|---|---|---|
Med | Var | Lasso | 33.86 | 0.13 | 30.79 | 0.17 | 3 | Complexity (NGLDM), Gray-Level Nonuniformity (GLRLM), SdVett_9 (Wavelet transform) | B-mode higher order and Wavelet transform |
Med | 1 | Lasso | 33.15 | 0.15 | 33.07 | 0.11 | 5 | Coarseness (NGTDM), Mean Correlation (Avg features), Run length Non-uniformity (GLRLM), meanVett_3 (Wavelet transform), and RF First order: Standard deviation (DEA) | B-mode higher order, Wavelet transform and Rf first order |
Med | 1.2 | Lasso | 33.24 | 0.14 | 31.87 | 0.15 | 6 | Entropy (First order), Coarseness (NGTDM), Mean variance (Avg features), SdVett_1 and SdVett_9 (Wavelet transform) and RF first order: Standard deviation (DEA) | B-mode first, higher order, Wavelet transform and Rf first order |
Med | 1.4 | Lasso | 36.22 | 0.07 | 34.83 | 0.07 | 3 | Skewness (first order), Coarseness (NGTDM), Gray level non-uniformity (GLRLM) | B-mode first and higher order |
Med | 1.6 | Lasso | – | – | – | – | 0 | – | – |