Fig. 4

The clinical impact curve and the DCA. a In the clinical impact curve, the red solid line indicates the number of patients at high risk with relevant risk threshold, and the blue dotted line indicates that patients with bone tumours that are truly positive for malignancy. This curve showed that the model had a better predictive ability for high-risk bone tumour patients with a range of threshold probability. b DCA for clinical model (green line), radiomics signature (blue line), and nomogram (rad line). The grey line is made with the assumption that all tumours are malignant. The black line is made with the assumption that no tumours are malignant. The curve indicates that the net benefit of the nomogram is better than the other cases when the threshold is within the range 0.1–0.8