Imaging after direct and indirect extracranial-intracranial bypass surgery.

Abstract

The purpose of this article is to describe the imaging features of different types of surgical cerebral revascularization techniques. Surgical cerebral revascularization involves direct and indirect techniques. Direct revascularization entails anastomosing a branch of the external carotid artery to a cerebral artery. Indirect revascularization involves delivering an extracranial vascular supply in proximity to the surface of the brain. The results of these techniques have distinctive imaging features.