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

Figure 3 Schematic diagram of various contrast-enhanced ultrasound quantitative. A: Maximum intensity; B: Time to peak; C: Area under the curve; D: Rise slope 50%; E: Rise time; F: Wash-in area under the curve; G: Falling time; H: Wash-out area under the curve; I: Falling half time. IMAX: Maximum intensity; TTP: Time to peak; AUC: Area under the curve; Rs50: Rise slope 50%; RT: Rise time; FT: Falling time; Fs50: Falling slope 50%; FHT: Falling half time.