Caption: Right common carotid artery injection revealing severe vasospasm affecting the right carotid siphon
before transluminal angioplasty is shown next to its corresponding transcranial doppler-measured cerebral blood flow velocity.
The patient was imaged using carotid angiography, and segmental narrowing of the carotid siphon
The mass surrounded and partially compressed the carotid siphon
and petrous segment of the internal carotid artery.