Fig. 2

Flow conditions before and after Pipeline embolization device deployment. a Pre-stent angiographic image of the aneurysm and ophthalmic artery. b Pre-stent velocity magnitude on a cut plane at peak systole. c Pre-stent streamline of the aneurysm and ophthalmic artery. d Angiographic image at the 6-month follow-up, with complete occlusion of the aneurysm and patency of the ophthalmic artery. e Post-stent velocity magnitude on the same cut plane at peak systole. Flow velocity of the ophthalmic artery remains unchanged, whereas flow velocity of aneurysm is obviously reduced. f Post-stent streamline of the aneurysm and ophthalmic artery compared with the pre-stent condition. There is no obvious change in the streamline in the ophthalmic artery