Table 4.
Univariate analysis for all PET and RFs and each scanner considered alone or in combination.
| Mean AUC | |||
|---|---|---|---|
| Scanner 1 | Scanner 2 | Scanner 1 + 2 | |
| “Conventional” PET features | |||
| SUV-related | |||
| SUVmax | 0.855 | 0.714 | 0.760 |
| SUVmean | 0.840 | 0.714 | 0.752 |
| SUVlbm | 0.851 | 0.730 | 0.767 |
| SUVbsa | 0.859 | 0.724 | 0.769 |
| L-L SUV R | 0.847 | 0.727 | 0.766 |
| L-BP SUV R | 0.860 | 0.727 | 0.776 |
| Metabolic volumes | |||
| MTV | 0.594 | 0.601 | 0.562 |
| TLG | 0.771 | 0.669 | 0.633 |
| First-order statistics | |||
| Histogram-related | |||
| Histo skewness | 0.682 | 0.585 | 0.629 |
| Histo kurtosis | 0.584 | 0.591 | 0.560 |
| Histo excess kurtosis | 0.584 | 0.592 | 0.560 |
| Histo entropy_log10 | 0.869 | 0.718 | 0.763 |
| Histo entropy_log2 | 0.869 | 0.719 | 0.762 |
| Histo energy | 0.852 | 0.704 | 0.743 |
| Shape-related | |||
| Shape volume_mL | 0.656 | 0.626 | 0.542 |
| Shape volume_vx | 0.656 | 0.626 | 0.542 |
| Shape sphericity | 0.615 | 0.641 | 0.580 |
| Shape Compacity | 0.637 | 0.634 | 0.530 |
| Second-order statistics | |||
| GLCM-related | |||
| GLCM homogeneity | 0.846 | 0.692 | 0.733 |
| GLCM energy | 0.846 | 0.702 | 0.743 |
| GLCM contrast | 0.849 | 0.705 | 0.740 |
| GLCM correlation | 0.572 | 0.677 | 0.556 |
| GLCM entropy_log10 | 0.853 | 0.732 | 0.747 |
| GLCM entropy_log2 | 0.850 | 0.734 | 0.747 |
| GLCM dissimilarity | 0.845 | 0.702 | 0.739 |
| GLRLM-related | |||
| GLRLM SRE | 0.843 | 0.692 | 0.731 |
| GLRLM LRE | 0.841 | 0.676 | 0.723 |
| GLRLM LGRE | 0.813 | 0.688 | 0.733 |
| GLRLM HGRE | 0.819 | 0.695 | 0.725 |
| GLRLM SRLGE | 0.799 | 0.687 | 0.729 |
| GLRLM SRHGE | 0.828 | 0.698 | 0.730 |
| GLRLM LRLGE | 0.831 | 0.692 | 0.741 |
| GLRLM LRHGE | 0.762 | 0.678 | 0.686 |
| GLRLM GLNU | 0.752 | 0.752 | 0.663 |
| GLRLM RLNU | 0.719 | 0.705 | 0.642 |
| GLRLM RP | 0.483 | 0.680 | 0.722 |
| NGLDM-related | |||
| NGLDM coarseness | 0.643 | 0.783 | 0.590 |
| NGLDM contrast | 0.808 | 0.808 | 0.721 |
| NGLDM busyness | 0.783 | 0.643 | 0.700 |
| GLZLM-related | |||
| GLZLM SZE | 0.777 | 0.677 | 0.703 |
| GLZLM LZE | 0.821 | 0.821 | 0.704 |
| GLZLM LGZE | 0.785 | 0.785 | 0.722 |
| GLZLM HGZE | 0.793 | 0.689 | 0.722 |
| GLZLM SZLGE | 0.614 | 0.614 | 0.574 |
| GLZLM SZHGE | 0.794 | 0.689 | 0.718 |
| GLZLM LZLGE | 0.837 | 0.697 | 0.725 |
| GLZLM LZHGE | 0.755 | 0.671 | 0.664 |
| GLZLM GLNU | 0.810 | 0.810 | 0.715 |
| GLZLM ZLNU | 0.808 | 0.716 | 0.726 |
| GLZLM ZP | 0.834 | 0.834 | 0.714 |