Fig. 1

3D models constructed from computed tomographic angiography images (a) and branches of the external carotid artery in the analysis area (b). The figure shows the common carotid artery (CCA), the internal carotid artery (ICA), the superior thyroid artery (SThA), the lingual artery (LA), the facial artery (FA), the occipital artery (OA), the maxillary artery (MA), the superficial temporal artery (STA), the middle meningeal artery (MMA) and the transverse facial artery (TFA)