Fig. 3

Receiver operating characteristic curves of histogram parameters for differentiating patients with and without lymph node metastasis. a The area under the curve (AUC) values of the parameters ADC_mean, ADC_min and ADC_max were 0.772, 0.737 and 0.656, respectively; (b) The AUC values of the parameters ADC_5%, ADC_10% and ADC_25% were 0.785, 0.794 and 0.791, respectively; (c) The AUC values of the parameters ADC_50%, ADC_75% and ADC_90% were 0.776, 0.747 and 0.732, respectively