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

Figure 4 Schematic diagram of lesion enhancement patterns. A: Homogeneous hypo enhancement (pattern I); B: Heterogeneous hypo enhancement without cystic components (pattern II); C: Peripheral ring enhancement (pattern III); D: Starry sky enhancement (pattern I); E: Capsular enhancement of cystic components (pattern IV); F: Hypo enhancement of cystic components (pattern VI).