AP view of a 3D MR angiogram with contrast of the brain shows marked narrowing of the bilateral supraclinoid internal carotid arteries and nonvisualization of the A1 and M1 segments of the anterior and middle cerebral arteries with multiple lenticulostriate collateral vessels arising from the terminal portions of the supraclinoid internal carotid arteries which are reconstituting the A2 and M2 segments.
Pediatric Imaging 