Figure 4.

(a) Was the ROC curve of radiomic models for the training cohort (red, green, and yellow lines) and test cohort (blue line). (b) was the decision curve for the radiomics model (red line), clinical model (green line), radiomics model only using radiomics features (yellow line), treat-all (thin black line), and treat-none (thick black line) schemes. The thin black line represented the assumption that all patients have LNM; the thick black thick represented the assumption that none of the patients have LNM. LNM, lymph node metastasis; ROC, receiver operating characteristic