CT - Brain
Non-enhanced CT shows an elongated and ectatic basilar artery with prominent co-dominant vertebral arteries. The basilar artery measures up to 9 mm in diameter at its proximal segment. Its tip and bifurcation point rise above the suprasellar cistern, abutting the floor of the 3rd ventricle. There is no secondary obstructive hydrocephalus.
There is a small left frontal scalp hematoma.