Enhancing 4D PC-MRI in an aortic phantom considering numerical simulations

Research output: Contribution to book/conference proceedings/anthology/reportConference contributionContributedpeer-review

Contributors

  • Jonas Kratzke - , Heidelberg University  (Author)
  • Nicolai Schoch - , Heidelberg University  (Author)
  • Christian Weis - , Heidelberg University  (Author)
  • Matthias Müller-Eschner - , Heidelberg University , German Cancer Research Center (DKFZ) (Author)
  • Stefanie Speidel - , Karlsruhe Institute of Technology (Author)
  • Mina Farag - , Heidelberg University  (Author)
  • Carsten J. Beller - , Heidelberg University  (Author)
  • Vincent Heuveline - , Heidelberg University  (Author)

Abstract

To date, cardiovascular surgery enables the treatment of a wide range of aortic pathologies. One of the current challenges in this field is given by the detection of high-risk patients for adverse aortic events, who should be treated electively. Reliable diagnostic parameters, which indicate the urge of treatment, have to be determined. Functional imaging by means of 4D phase contrast-magnetic resonance imaging (PC-MRI) enables the time-resolved measurement of blood flow velocity in 3D. Applied to aortic phantoms, three dimensional blood flow properties and their relation to adverse dynamics can be investigated in vitro. Emerging "?in silico"? methods of numerical simulation can supplement these measurements in computing additional information on crucial parameters. We propose a framework that complements 4D PC-MRI imaging by means of numerical simulation based on the Finite Element Method (FEM). The framework is developed on the basis of a prototypic aortic phantom and validated by 4D PC-MRI measurements of the phantom. Based on physical principles of biomechanics, the derived simulation depicts aortic blood flow properties and characteristics. The framework might help identifying factors that induce aortic pathologies such as aortic dilatation or aortic dissection. Alarming thresholds of parameters such as wall shear stress distribution can be evaluated. The combined techniques of 4D PC-MRI and numerical simulation can be used as complementary tools for risk-stratification of aortic pathology.

Details

Original languageEnglish
Title of host publicationMedical Imaging 2015
EditorsChristoph Hoeschen, Despina Kontos, Christoph Hoeschen
PublisherSPIE - The international society for optics and photonics, Bellingham
ISBN (electronic)9781628415025
Publication statusPublished - 2015
Peer-reviewedYes
Externally publishedYes

Publication series

SeriesProgress in Biomedical Optics and Imaging - Proceedings of SPIE
Volume9412
ISSN1605-7422

Conference

TitleMedical Imaging 2015: Physics of Medical Imaging
Duration22 - 25 February 2015
CityOrlando
CountryUnited States of America

Keywords

Keywords

  • 4D phase contrast-MRI, Aortic phantom, Blood flow analysis, Computational fluid dynamics, Finite element method, Mathematical modeling, Numerical simulation