FIG 2. Postradiosurgery study of 48-year-old woman with a left frontal arteriovenous malformation.

A–B, Conventional angiograms in sagittal (A) and coronal (B) views show a medium-sized arteriovenous malformation fed by branches of the middle cerebral artery. It drains via 2 veins (anterior and posterior) into the superior sagittal sinus. Note stenosis of the anterior vein.

C–I, Several stages of 3D dynamic MR digital subtraction angiograms during the passage of a contrast bolus in sagittal (C, early arterial phase; D, late arterial phase; E, early venous phase; and F–G, late venous phase) and coronal (H, arterial phase; I, early venous phase) maximum-intensity-projection reconstructions show the nidus and 2 draining veins matching the conventional catheter angiography findings.