Recently, there has been increased interest in the use of flow divertion endovascular devices such as stents [1–3] to treat unruptured cerebral aneurysms. The goal of these devices is to deviate the blood flow away from the aneurysm and promote its thrombosis and exclusion from the circulation. However, one of the major concerns with these devices is the possibility of occluding a small arterial branch or perforating artery that may be jailed by the stent mesh. This could result in an ischemic stroke. The goal of this study was to assess the reduction in the flow rate in jailed side branches after stenting of cerebral aneurysms.

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