Figure 7.

Neck ultrasonograph (Left) ultrasonographic view of normal arterial anatomy (Y sign). The bifurcation of the brachiocephalic trunk (B) into the right common carotid artery (C) and the right subclavian artery (S) describes a Y. (Right) Ultrasonographic view of the direct origin of the right common carotid artery (C) from the aortic arch (A). The right subclavian lusorian artery (L) has an independent course and arises separately from the common carotid artery. Reproduced with permission from (19).