Noninvasive prediction of Ki-67 expression in pancreatic cancer via contrast-enhanced ultrasound quantitative parameters: A diagnostic model study

Figure 7 The receiver operating characteristic curve. A: Low Ki-67 expression; B: High Ki-67 expression. ROC: Receiver operating characteristic; Rs50: Rise slope 50%; IMAX: Maximum intensity; TTP: Time to peak; RT: Rise time; mTT: Mean transit time; Fs50: Falling slope 50%; AUC: Area under the curve; WinR: Wash-in rate; WoutR: Wash-out rate; Rs1090: Rise slope 10%-90%; FT: Falling time; FHT: Falling half time; WinAUC: Wash-in area under the curve; WoutAUC: Wash-out area under the curve; WioAUC: Wash-in and out area under curve.