Carotid Artery Triplex Ultrasound
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Gray-scale images of left CCA shows lumen to be filled with echogenic plaque. Color imaging failed to show flow. Color Doppler image of left carotid bifurcation reveals both internal carotid artery (ICA) and external carotid artery (ECA) to be patent. Color Doppler images with spectral Doppler tracings show flow in ECA is reversed while flow in ICA remains anterograde.