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Performances of the baselines vs the best-performing model trained on 3 GS groups (GGG 1–3, GGG 4, GGG 5) and tested on 2 GS groups (GGG 1–3, GGG 4–5) (top, grey: baseline models; bottom, orange: double-image radiomics), expressed as their balanced accuracies (mean and standard deviation, in percentages), and sensitivities by class (t-test comparisons: patient baseline vs radiomics baseline: p = 0.203; patient baseline vs PET + ADC: p = 0.011; radiomics baseline vs PET + ADC: 0.029)
