Towards indirect in vivo measurement of material properties of aortic aneurysms: Determining the displacement field

Róbert Nagy, Csaba Csobay-Novák, Attila Lovas, Péter Sótonyi, Imre Bojtár

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

We introduce the first out of three stages of a project aiming at developing a decision procedure on abdominal aneurysm treatment in clinical practice. Going beyond the statistically backed up diameter and growth rate based routine and the state-of-the-art stress based fluid-structure interaction modelling; we develop a faster, patient specific method based on the degree of degradation determined by indirect local identification of material properties. As the first milestone, having captured the aneurysm wall position in time using in-vivo ECG-gated CTA imaging, after a smoothing algorithm compensating for the measurement errors, we are able to approximate the displacement of each material point through a complete cardiac cycle based on numerical modelling observations. The resulting strain and strain rate field provide the foundation of the final optimization algorithm.

Original languageEnglish
Title of host publication11th World Congress on Computational Mechanics, WCCM 2014, 5th European Conference on Computational Mechanics, ECCM 2014 and 6th European Conference on Computational Fluid Dynamics, ECFD 2014
EditorsAntonio Huerta, Eugenio Onate, Xavier Oliver
PublisherInternational Center for Numerical Methods in Engineering
Pages376-385
Number of pages10
ISBN (Electronic)9788494284472
Publication statusPublished - Jul 1 2014
EventJoint 11th World Congress on Computational Mechanics, WCCM 2014, the 5th European Conference on Computational Mechanics, ECCM 2014 and the 6th European Conference on Computational Fluid Dynamics, ECFD 2014 - Barcelona, Spain
Duration: Jul 20 2014Jul 25 2014

Publication series

Name11th World Congress on Computational Mechanics, WCCM 2014, 5th European Conference on Computational Mechanics, ECCM 2014 and 6th European Conference on Computational Fluid Dynamics, ECFD 2014

Other

OtherJoint 11th World Congress on Computational Mechanics, WCCM 2014, the 5th European Conference on Computational Mechanics, ECCM 2014 and the 6th European Conference on Computational Fluid Dynamics, ECFD 2014
CountrySpain
CityBarcelona
Period7/20/147/25/14

Keywords

  • Abdominal aortic aneurysm
  • Clinical application
  • ECG-gated CTA
  • In vivo measurement
  • Material parameters
  • Risk of rupture

ASJC Scopus subject areas

  • Mechanics of Materials
  • Computational Theory and Mathematics
  • Computer Science Applications
  • Mechanical Engineering

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  • Cite this

    Nagy, R., Csobay-Novák, C., Lovas, A., Sótonyi, P., & Bojtár, I. (2014). Towards indirect in vivo measurement of material properties of aortic aneurysms: Determining the displacement field. In A. Huerta, E. Onate, & X. Oliver (Eds.), 11th World Congress on Computational Mechanics, WCCM 2014, 5th European Conference on Computational Mechanics, ECCM 2014 and 6th European Conference on Computational Fluid Dynamics, ECFD 2014 (pp. 376-385). (11th World Congress on Computational Mechanics, WCCM 2014, 5th European Conference on Computational Mechanics, ECCM 2014 and 6th European Conference on Computational Fluid Dynamics, ECFD 2014). International Center for Numerical Methods in Engineering.