Imaged portions

No circumscribed outpouching (especially in the proximal and horizontal segments)

Position

Course (no excessive tortuosity, no impression on brain stem)

Caliber (no general or circumscribed luminal dilatation)

Signal characteristics (homogeneous intralumi-

nal signal, no filling defect)

Contours (smooth)

Position

Symmetry

Course

Caliber (symmetry) Signal characteristics No excessive tortuosity

No circumscribed dilatation, especially in the proximal segment

Presence

Course

Caliber

Signal characteristics No arteriovenous communications No abnormalities

MR angiogram of the cranial arteries, coronal view
MR angiogram of the cranial arteries, axial view
MR angiogram of the cranial arteries, lateral view

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