There　is　still　a　considerable　lack　of　quantitative　information　concerning　the　effects　of　stent　structures　on　blood　flow　in　an　aneurismal　cavity.　In　this　paper,　five　virtual　stents　with　different　structures　and　wire　cross-sections　were　designed　for　incorporation　into　the　same　patient-specific　aneurysm　model.　Computational　fluid　dynamics　simulations　were　performed　so　as　to　study　how　these　five　types　of　stents　modified　hemodynamic　parameters.　Numerical　results　demonstrated　that　the　mean　flow　rate　in　the　aneurismal　cavity　decreased　the　most　in　the　model　that　used　a　stent　with　a　rectangular　wire　cross-section,　and　that　the　wall　shear　stresses　at　the　dome　and　neck　of　the　aneurysm　decreased　more　in　models　that　used　a　stent　with　a　circular　wire　cross-section　or　a　spiral　stent　with　a　rectangular　wire　cross-section　compared　to　other　models.　In　addition,　the　wall　pressure　on　the　aneurysm　increased　slightly　after　implantation　of　the　stent　in　all　five　models.　This　result　differs　from　that　previously　published,　and　may　help　guide　the　design　and　assist　clinicians　in　selecting　an　appropriate　stent　for　treating　cerebral　aneurysms.　(C)　2010　Elsevier　Ltd.　All　rights　reserved.