Figure 6. Receiver operating characteristic (ROC) curves for differentiating the performance of IVIM parameters in patients with different TET types based on WHO classification and Masaoka-Koga stage.

(A) LRT vs. HRT and TC based on ADC_mb, D, and D* values. (B) Early vs. advanced stage based on ADC_mb, D, and D* values. LRT = low risk thymoma; HRT = high risk thymoma; TC = thymic carcinoma; ADC_mb = ADC calculated using mono-exponential model DWI (multi b-values: 0-1200 sec/mm²); D = ADC_slow or pure diffusion coefficient; D* = ADC_fast or pseudo-diffusion coefficient.