Fig. 2. Receiver operating characteristic (ROC) curve analysis for determining the most appropriate apparent diffusion coefficient (ADC) cutoff value. The cutoff value of 746×10⁻⁶ mm²/s was chosen to maximize the discriminatory ability related to sensitivity and specificity. The area under the receiver operating characteristics curve was 0.691 (95% confidential interval [CI]. 0.612–0.762), the sensitivity was 89.86 (95% CI, 80.2–95.8), and the specificity was 43.18 (95% CI, 32.7–54.2).