Header

UZH-Logo

Maintenance Infos

Stent induced loading of the aortic valve complex


Hopf, Raoul; Gessat, Michael; Falk, Volkmar; Mazza, Edoardo (2012). Stent induced loading of the aortic valve complex. In: 15th International Conference on Medical Image Computing and Computer Assisted Intervention (MICCAI), Nice, 1 October 2012 - 5 October 2012.

Abstract

In order to evaluate the performance of stents used in transcatheter aortic valve implantation (T-AVI), finite element simulations are set up to re-construct patient specific contact forces between implant and its surrounding tissue. The reference geometry of the stent is obtained using micro-CT scanning data. A procedure is defined to create a numerically efficient and robust model of the stent made of beam elements. The model is validated with experiments applying representative loading cases. Post-op CT image data provide patient specific displacement maps used to define kinematic boundary conditions for the finite element simulation. An approach to deal with the issue of spurious strains induced by measurement uncertainties from CT images is proposed. Maps of radial forces acting on the aortic tissue are obtained.

Abstract

In order to evaluate the performance of stents used in transcatheter aortic valve implantation (T-AVI), finite element simulations are set up to re-construct patient specific contact forces between implant and its surrounding tissue. The reference geometry of the stent is obtained using micro-CT scanning data. A procedure is defined to create a numerically efficient and robust model of the stent made of beam elements. The model is validated with experiments applying representative loading cases. Post-op CT image data provide patient specific displacement maps used to define kinematic boundary conditions for the finite element simulation. An approach to deal with the issue of spurious strains induced by measurement uncertainties from CT images is proposed. Maps of radial forces acting on the aortic tissue are obtained.

Statistics

Downloads

132 downloads since deposited on 18 Feb 2013
15 downloads since 12 months
Detailed statistics

Additional indexing

Item Type:Conference or Workshop Item (Paper), not refereed, original work
Communities & Collections:04 Faculty of Medicine > University Hospital Zurich > Clinic for Cardiovascular Surgery
Dewey Decimal Classification:610 Medicine & health
Language:English
Event End Date:5 October 2012
Deposited On:18 Feb 2013 07:56
Last Modified:05 Apr 2016 16:28
Related URLs:http://www.miccai2012.org/

Download

Preview Icon on Download
Preview
Filetype: PDF
Size: 478kB

TrendTerms

TrendTerms displays relevant terms of the abstract of this publication and related documents on a map. The terms and their relations were extracted from ZORA using word statistics. Their timelines are taken from ZORA as well. The bubble size of a term is proportional to the number of documents where the term occurs. Red, orange, yellow and green colors are used for terms that occur in the current document; red indicates high interlinkedness of a term with other terms, orange, yellow and green decreasing interlinkedness. Blue is used for terms that have a relation with the terms in this document, but occur in other documents.
You can navigate and zoom the map. Mouse-hovering a term displays its timeline, clicking it yields the associated documents.

Author Collaborations