The circle of Willis is critical, as it is the meeting point of many important arteries supplying blood to the brain. The internal carotid arteries branch off from here into smaller arteries ...

The stroke CT protocol at UCSF for all acute stroke and TIA patients consists of a noncontrast CT of the head, followed by CTA from the aortic arch through the circle of Willis, and two-level CT ...

The posterior communicating artery (PCOM) is a part of a group of arteries in the brain known as the circle of Willis. The artery connects the internal carotid and the posterior cerebral arteries.