ARTICLE ORIGINAL Immediate intracranial aneurysm occlusion after embolization with detachable coils: a comparison between MR angiography and intra-arterial digital subtraction angiography Occlusion immédiate des anévrismes intracrâniens traités par embolisation à l’aide de coils détachables : comparaison entre l’ARM et l’angiographie conventionnelle B. Lubicz * , M. Levivier, N. Sadeghi, P. Emonts, D. Balériaux Department of Neuroradiology (BL, NS, PE, DB) and Department of Neurosurgery (ML), Erasme University Hospital, Brussels, Belgium KEYWORDS Intracranial aneurysm; Endovascular treatment; Detachable coils; MR angiography Abstract Background and purpose. — To prospectively compare the effectiveness of time-of-flight (TOF) and contrast-enhanced (CE) MR angiography (MRA) with that of digital subtraction angiography (DSA) to assess immediate intracranial aneurysm occlusion after selective embolization. Methods. — From August 2006 to March 2007, 33 consecutive patients with 40 aneurysms were included. Thirty aneurysms were treated by endosaccular coils (group 1). Ten aneurysms were treated by stent placement and subsequent endosaccular coils (group 2). All patients under- went MRA within 24 h after treatment. One senior and one fellow radiologist independently reviewed the MR images, and another senior radiologist reviewed the DSA images. Results. — DSA showed 22 complete occlusions, ten residual necks, and eight residual aneur- ysms. For residual neck detection, there was no difference between TOF-MRA (sensitivity, 80%–80%; specificity, 93.8%–100%, according to both readers) and CE-MRA (sensitivity, 80%– 80%; specificity, 100%). For residual aneurysm detection, there was a significant difference between TOF-MRA (sensitivity, 50%–62.5%; specificity, 100%) and CE-MRA (sensitivity and speci- ficity, 100%, according to both readers). In group 2, a residual aneurysm was missed by both readers with TOF-MRA in the same 3 aneurysms. Moreover, both readers judged CE-MRA better Journal of Neuroradiology 34 (2007) 190–197 * Corresponding author. Service de radiologie (EA 2691), hôpital Erasme, 808, route de Lennik, 1070 Bruxelles, Belgium. E-mail address: blubicz@ulb.ac.be (B. Lubicz). 0150-9861/$ - see front matter © 2007 Elsevier Masson SAS. All rights reserved. doi:10.1016/j.neurad.2007.05.002