title: Three-dimensional dynamic magnetic resonance angiography for the evaluation of radiosurgically treated cerebral arteriovenous malformations.
abstract: We assessed the value of three-dimensional (3D) dynamic magnetic resonance angiography (MRA) for the follow-up of patients with radiosurgically treated cerebral arteriovenous malformations (AVMs). Fifty-four patients with cerebral AVMs treated by radiosurgery (RS) were monitored using conventional catheter angiography (CCA) and 3D dynamic MRA with sensitivity encoding based on the parallel imaging. Cerebral AVM was qualitatively classified by two radiologists into one of five categories in terms of residual nidus size and persistence of early draining vein (I, >6 cm; II, 3-6 cm; III, <3 cm; IV, isolated early draining vein; V, complete obliteration). 3D MRA findings showed a good agreement with CCA in 40 cases (kappa=0.62). Of 23 nidus detected on CCA, 3D dynamic MRA showed 14 residual nidus. Of 28 occluded nidus on 3D dynamic MRA, 22 nidus were occluded on CCA. The sensitivity and specificity of 3D dynamic MRA for the detection of residual AVM were 81% and 100%. 3D dynamic MRA after RS may therefore be useful in association with MRI and can be repeated as long as opacification of the nidus or early venous drainage persists, one CCA remaining indispensable to affirm the complete occlusion at the end of follow-up.
authors.affiliation: Department of Neuroradiology, EA 2691, Roger Salengro Hospital, rue du Pr. E Laine, 59037, Lille, France. jygauvrit@chru-lille.fr
authors.forename: Jean-Yves
authors.initials: JY
authors.lastname: Gauvrit
authors.forename: Catherine
authors.initials: C
authors.lastname: Oppenheim
authors.forename: Francois
authors.initials: F
authors.lastname: Nataf
authors.forename: Olivier
authors.initials: O
authors.lastname: Naggara
authors.forename: Denis
authors.initials: D
authors.lastname: Trystram
authors.forename: Thierry
authors.initials: T
authors.lastname: Munier
authors.forename: Daniel
authors.initials: D
authors.lastname: Fredy
authors.forename: Jean-Pierre
authors.initials: JP
authors.lastname: Pruvo
authors.forename: François-Xavier
authors.initials: FX
authors.lastname: Roux
authors.forename: Xavier
authors.initials: X
authors.lastname: Leclerc
authors.forename: Jean-François
authors.initials: JF
authors.lastname: Meder
mesh_terms: D000328:Adult; D000368:Aged; D002533:Cerebral Angiography; D005260:Female; D006801:Humans; D007091:Image Processing, Computer-Assisted; D021621:Imaging, Three-Dimensional; D002538:Intracranial Arteriovenous Malformations / Q000473:pathology* / Q000601:surgery; D018810:Magnetic Resonance Angiography / Q000379:methods*; D008297:Male; D008875:Middle Aged; D016634:Radiosurgery; D012680:Sensitivity and Specificity