Figure 3.

CFI images demonstrating the adopted qualitative vascularity grading. (I): Exclusive peripheral vascularity (arrows) in a nodule that had a conclusive benign histopathology diagnosis in a 61-year-old male patient. (II): Predominant peripheral vascularity demonstrated as more abundant vascularity in the outer regions (arrows) than the central regions in a histopathologically-benign nodule in a 53-year-old female patient. (III): Predominant vascularity in the central portion of a nodule (arrows) in a 44-year-old female who was diagnosed with PTC. (IV): Exclusive marked central flow (arrows) in a nodule diagnosed as PTC in a 51-year-old female.