Figure 1

Incidental left frontal cerebral arteriovenous malformation in a 65 year-old woman after 3 partial embolizations (patient #1). Maximum intensity projections of pre-operative dynamic 4D-MR angiography (a: frontal view, b: saggital view), treatment planning (c: fused DSA and planning target volume (PTV), d-f: fused CT with PTV and isodose lines).