Figure 5

Comparative diagnostic values of quantitative apparent diffusion coefficient (ADC) value parameters for discriminating between benign and malignant ovarian tumors. When an absolute ADC value less than 1.20 × 10^-3 mm²/s is predictive of malignancy, on receiver operating characteristic (ROC) analysis, the area under the curve (AUC) (a) is small (0.72), and when fibrothecomas, cystadenofibromas and Brenner tumors are excluded, the ROC AUC is the greatest (0.96), and thus it is probably the most effective factor for discriminating between benign and malignant ovarian masses (b).