title: Geometrical deployment for braided stent.
abstract: The prediction of flow diverter stent (FDS) implantation for the treatment of intracranial aneurysms (IAs) is being increasingly required for hemodynamic simulations and procedural planning. In this paper, a deployment model was developed based on geometrical properties of braided stents. The proposed mathematical description is first applied on idealized toroidal vessels demonstrating the stent shortening in curved vessels. It is subsequently generalized to patient specific vasculature predicting the position of the filaments along with the length and local porosity of the stent. In parallel, in-vitro and in-vivo FDS deployments were measured by contrast-enhanced cone beam CT (CBCT) in idealized and patient-specific geometries. These measurements showed a very good qualitative and quantitative agreement with the virtual deployments and provided experimental validations of the underlying geometrical assumptions. In particular, they highlighted the importance of the stent radius assessment in the accuracy of the deployment prediction. Thanks to its low computational cost, the proposed model is potentially implementable in clinical practice providing critical information for patient safety and treatment outcome assessment.
authors.affiliation: Department of Neuroradiology, University Hospitals of Geneva, Switzerland; Laboratory for Hydraulic Machines (LMH), École Polytechnique Fédérale de Lausanne (EPFL), Avenue de Cour 33bis, Lausanne CH-1007, Switzerland. Electronic address: pierre.bouillot@unige.ch.
authors.forename: Pierre
authors.initials: P
authors.lastname: Bouillot
authors.affiliation: Department of Neuroradiology, University Hospitals of Geneva, Switzerland.
authors.forename: Olivier
authors.initials: O
authors.lastname: Brina
authors.affiliation: Department of Neuroradiology, University Hospitals of Geneva, Switzerland.
authors.forename: Rafik
authors.initials: R
authors.lastname: Ouared
authors.affiliation: Department of Neuroradiology, University Hospitals of Geneva, Switzerland.
authors.forename: Hasan
authors.initials: H
authors.lastname: Yilmaz
authors.affiliation: Laboratory for Hydraulic Machines (LMH), École Polytechnique Fédérale de Lausanne (EPFL), Avenue de Cour 33bis, Lausanne CH-1007, Switzerland.
authors.forename: Mohamed
authors.initials: M
authors.lastname: Farhat
authors.affiliation: Department of Neuroradiology, University Hospitals of Geneva, Switzerland.
authors.forename: Gorislav
authors.initials: G
authors.lastname: Erceg
authors.affiliation: Department of Neuroradiology, University Hospitals of Geneva, Switzerland.
authors.forename: Karl-Olof
authors.initials: KO
authors.lastname: Lovblad
authors.affiliation: Department of Neuroradiology, University Hospitals of Geneva, Switzerland.
authors.forename: Maria Isabel
authors.initials: MI
authors.lastname: Vargas
authors.affiliation: Department of Neuroradiology, University Hospitals of Geneva, Switzerland.
authors.forename: Zsolt
authors.initials: Z
authors.lastname: Kulcsar
authors.affiliation: Department of Neuroradiology, University Hospitals of Geneva, Switzerland; Division of Neuroradiology, Department of Medical Imaging, Toronto Western Hospital, University Health Network, Toronto, Ontario, Canada; Division of Neurosurgery, Department of Surgery, Toronto Western Hospital, University Health Network, Toronto, Ontario, Canada.
authors.forename: Vitor Mendes
authors.initials: VM
authors.lastname: Pereira
mesh_terms: D002533:Cerebral Angiography / Q000379:methods; D003198:Computer Simulation; D017076:Computer-Aided Design; D019544:Equipment Failure Analysis; D006801:Humans; D002532:Intracranial Aneurysm / Q000000981:diagnostic imaging* / Q000473:pathology / Q000601:surgery*; D008955:Models, Cardiovascular; D011474:Prosthesis Design; D019919:Prosthesis Implantation / Q000379:methods*; D015607:Stents; D025321:Surgery, Computer-Assisted / Q000379:methods*; D016896:Treatment Outcome
keywords: Braided stent; Flow diverter stent; Geometrical model; Intracranial aneurysm; Virtual deployment