An Important Clue in the Sonographic Diagnosis of Internal Carotid Artery Agenesis: Ipsilateral Common Carotid Artery Hypoplasia

Figure 1

(a) Doppler US images demonstrate the diameters of the right and left CCA, which are 8 mm and 4 mm, in respect. (b) These axial Doppler US images reveal the diameters of the right and left ICA. (c) The Doppler view of the left ECA and its branching. (d) The spectral drawing demonstrating that the vessel mentioned in Figure 1(c) is indeed the ECA.

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(b)

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