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Follow-up of intracranial aneurysms treated by a WEB flow disrupter: a comparative study of DSA and contrast-enhanced MR angiography
  1. Benjamin Mine1,
  2. Illario Tancredi1,
  3. Ali Aljishi1,2,
  4. Faisal Alghamdi1,3,
  5. Margarita Beltran1,
  6. Maxime Herchuelz1,
  7. Boris Lubicz1
  1. 1Department of Diagnostic and Interventional Neuroradiology, Erasme University Hospital, Brussels, Belgium
  2. 2Radiology Department, Dammam Medical Center, Dammam, Saudi Arabia
  3. 3Division of Neuroradiology, Medical Imaging Department, King Abdullah Medical City, Makkah, Saudi Arabia
  1. Correspondence to Dr Benjamin Mine, Department of Diagnostic and Interventional Neuroradiology, Erasme University Hospital, Route de Lennik 808, Brussels 1070, Belgium; Benjamin_Mine{at}me.com

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).

Materials and 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.

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