Fig. 2
From: High-frame rate vector flow imaging of the carotid bifurcation
Multimodality Doppler evaluation of the CB. a) CD shows reverse flow in the sinus (**), at the ECA entrance (*); in the ICA complex flow (arrowhead), the behavior of which is not understandable due to angle dependence. b) PW at the ICA: bidirectional flow in the descending systole (arrowheads). c) VFI at the systolic peak. High-velocity red vectors near the flow divider in ICA (arrowhead) and ECA (white arrow). d) VFI in the descending systole. Multidirectional flow and vortexes (short green or yellow/orange vectors) in the ICA sinus (**) and at the ECA (*). CCA = Common carotid artery. ICA = Internal carotid artery. ECA = External carotid artery. STA = Superior thyroid artery