Fluid-Structure Simulations of a Ruptured Intracranial Aneurysm: Constant versus Patient-Specific Wall Thickness
Joint Authors
Voß, S.
Glaßer, S.
Hoffmann, T.
Beuing, O.
Weigand, S.
Jachau, K.
Preim, B.
Berg, P.
Thévenin, Dominique
Janiga, Gábor
Source
Computational and Mathematical Methods in Medicine
Issue
Vol. 2016, Issue 2016 (31 Dec. 2016), pp.1-8, 8 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2016-09-18
Country of Publication
Egypt
No. of Pages
8
Main Subjects
Abstract EN
Computational Fluid Dynamics is intensively used to deepen the understanding of aneurysm growth and rupture in order to support physicians during therapy planning.
However, numerous studies considering only the hemodynamics within the vessel lumen found no satisfactory criteria for rupture risk assessment.
To improve available simulation models, the rigid vessel wall assumption has been discarded in this work and patient-specific wall thickness is considered within the simulation.
For this purpose, a ruptured intracranial aneurysm was prepared ex vivo, followed by the acquisition of local wall thickness using μCT.
The segmented inner and outer vessel surfaces served as solid domain for the fluid-structure interaction (FSI) simulation.
To compare wall stress distributions within the aneurysm wall and at the rupture site, FSI computations are repeated in a virtual model using a constant wall thickness approach.
Although the wall stresses obtained by the two approaches—when averaged over the complete aneurysm sac—are in very good agreement, strong differences occur in their distribution.
Accounting for the real wall thickness distribution, the rupture site exhibits much higher stress values compared to the configuration with constant wall thickness.
The study reveals the importance of geometry reconstruction and accurate description of wall thickness in FSI simulations.
American Psychological Association (APA)
Voß, S.& Glaßer, S.& Hoffmann, T.& Beuing, O.& Weigand, S.& Jachau, K.…[et al.]. 2016. Fluid-Structure Simulations of a Ruptured Intracranial Aneurysm: Constant versus Patient-Specific Wall Thickness. Computational and Mathematical Methods in Medicine،Vol. 2016, no. 2016, pp.1-8.
https://search.emarefa.net/detail/BIM-1100248
Modern Language Association (MLA)
Voß, S.…[et al.]. Fluid-Structure Simulations of a Ruptured Intracranial Aneurysm: Constant versus Patient-Specific Wall Thickness. Computational and Mathematical Methods in Medicine No. 2016 (2016), pp.1-8.
https://search.emarefa.net/detail/BIM-1100248
American Medical Association (AMA)
Voß, S.& Glaßer, S.& Hoffmann, T.& Beuing, O.& Weigand, S.& Jachau, K.…[et al.]. Fluid-Structure Simulations of a Ruptured Intracranial Aneurysm: Constant versus Patient-Specific Wall Thickness. Computational and Mathematical Methods in Medicine. 2016. Vol. 2016, no. 2016, pp.1-8.
https://search.emarefa.net/detail/BIM-1100248
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1100248