title: Follow-up of intracranial aneurysms treated by a WEB flow disrupter: a comparative study of DSA and contrast-enhanced MR angiography.
abstract: OBJECTIVE
  To compare contrast-enhanced MR angiography (CE-MRA) and DSA for the follow-up of intracranial aneurysms (IAs) treated with the Woven EndoBridge embolization system DL (WEB DL; Sequent Medical, Aliso Viejo, California, USA).
  
  
  METHODS
  We retrospectively identified all patients treated with a WEB DL between November 2010 and February 2013 in 2 hospitals. The IA occlusion was graded on follow-up CE-MRA and DSA by 4 independent readers and by 2 readers reaching a consensus, respectively. Interobserver agreement for MRA and intertechnique agreement was evaluated by calculating linear weighted κ.
  
  
  RESULTS
  Fifteen patients with 16 IAs were included. Mean delay between MRA and DSA was 2 months (range 0-16 months). Interobserver agreement for MRA was substantial to almost perfect (κ=0.686-0.921; mean κ=0.809). Intertechnique agreement was moderate to substantial (κ=0.579-0.724; mean κ=0.669). Only three out of five inadequately occluded IAs were detected by MRA.
  
  
  CONCLUSIONS
  CE-MRA is a useful tool for the follow-up of IAs treated with a WEB DL. However, early follow-up with DSA remains mandatory to detect inadequately occluded IAs.
authors.affiliation: Department of Diagnostic and Interventional Neuroradiology, Erasme University Hospital, Brussels, Belgium.
authors.forename: Benjamin
authors.initials: B
authors.lastname: Mine
authors.affiliation: Department of Diagnostic and Interventional Neuroradiology, Erasme University Hospital, Brussels, Belgium.
authors.forename: Illario
authors.initials: I
authors.lastname: Tancredi
authors.affiliation: Department of Diagnostic and Interventional Neuroradiology, Erasme University Hospital, Brussels, Belgium Radiology Department, Dammam Medical Center, Dammam, Saudi Arabia.
authors.forename: Ali
authors.initials: A
authors.lastname: Aljishi
authors.affiliation: Department of Diagnostic and Interventional Neuroradiology, Erasme University Hospital, Brussels, Belgium Division of Neuroradiology, Medical Imaging Department, King Abdullah Medical City, Makkah, Saudi Arabia.
authors.forename: Faisal
authors.initials: F
authors.lastname: Alghamdi
authors.affiliation: Department of Diagnostic and Interventional Neuroradiology, Erasme University Hospital, Brussels, Belgium.
authors.forename: Margarita
authors.initials: M
authors.lastname: Beltran
authors.affiliation: Department of Diagnostic and Interventional Neuroradiology, Erasme University Hospital, Brussels, Belgium.
authors.forename: Maxime
authors.initials: M
authors.lastname: Herchuelz
authors.affiliation: Department of Diagnostic and Interventional Neuroradiology, Erasme University Hospital, Brussels, Belgium.
authors.forename: Boris
authors.initials: B
authors.lastname: Lubicz
mesh_terms: D000328:Adult; D000368:Aged; D015901:Angiography, Digital Subtraction; D003287:Contrast Media; D004621:Embolization, Therapeutic; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D002532:Intracranial Aneurysm / Q000000981:diagnostic imaging* / Q000628:therapy*; D018810:Magnetic Resonance Angiography; D008297:Male; D008875:Middle Aged; D012189:Retrospective Studies; D016896:Treatment Outcome
chemical_list: D003287:Contrast Media
keywords: Aneurysm; Device; Magnetic Resonance Angiography