computed tomographic angiography (CTA) and Doppler ultrasonography were described less frequently. Imaging findings reported were vertebral artery stenosis (51%), string and pearls (48%), arterial ...

A subarachnoid hemorrhage was demonstrated on a head CT scan ... the right internal carotid artery (ICA; velocity 165 cm/s; normal range 30–40 cm/s). The left vertebral artery also showed ...

studies had to report dissection frequency for at least 3 vertebral artery segments. Very few data were available comparing different imaging modalities to conventional angiography. In most cases ...