Vertebral Basilar Angiogram

Right Vertebral Artery

Left Vertebral Artery (refux)

Vertebral Artery Piecing the Dura

Posterior Inferior Cerebellar Artery

Anterior Inferior Cerebellar Artery

Superior Cerebellar Artery

Posterior Cerebral Artery

PCA - P1 Segment

PCA - P2 Segment

PCA - P3 Segment

PCA - P4 Segment

Basilar Artery                                     Top of the Basilar                     Brainstem / Thalamic Perforators

Vertebral Basilar Angiogram. (Left) lateral view; (Right) AP view.

This study was performed by injecting contrast into the right vertebra artery, which is well opacified. There is also some retrograde flow of contrast down the left vertebral artery which allows visualization of the distal portion of the vertebral artery and posterior inferior cerebellar artery PICA on that side.

The Posterior Cerebral Artery (PCA) is commonly divided into four numbered segments: (1) the P1 segment runs from the top of the basilar to the origin of the posterior communicating artery in the interpeduncular cistern; (2) the P2 segment runs through the ambient cistern from the origin from the posterior communicating artery around the cerebral peduncle; (3) the P3 segment runs through the quadrigeminal cistern to where the calcarine sulcus originates; and (4) the P4 segments runs from the calcarine sulcus to over the cortex

Revised 03/29/14
Copyrighted 2006. David C Preston