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Medical & Biological Engineering & Computing

, Volume 52, Issue 2, pp 159–168 | Cite as

High-quality conforming hexahedral meshes of patient-specific abdominal aortic aneurysms including their intraluminal thrombi

  • J. Tarjuelo-Gutierrez
  • B. Rodriguez-Vila
  • D. M. Pierce
  • T. E. Fastl
  • P. Verbrugghe
  • I. Fourneau
  • G. Maleux
  • P. Herijgers
  • G. A. Holzapfel
  • E. J. Gomez
Original Article

Abstract

In order to perform finite element (FE) analyses of patient-specific abdominal aortic aneurysms, geometries derived from medical images must be meshed with suitable elements. We propose a semi-automatic method for generating conforming hexahedral meshes directly from contours segmented from medical images. Magnetic resonance images are generated using a protocol developed to give the abdominal aorta high contrast against the surrounding soft tissue. These data allow us to distinguish between the different structures of interest. We build novel quadrilateral meshes for each surface of the sectioned geometry and generate conforming hexahedral meshes by combining the quadrilateral meshes. The three-layered morphology of both the arterial wall and thrombus is incorporated using parameters determined from experiments. We demonstrate the quality of our patient-specific meshes using the element Scaled Jacobian. The method efficiently generates high-quality elements suitable for FE analysis, even in the bifurcation region of the aorta into the iliac arteries. For example, hexahedral meshes of up to 125,000 elements are generated in less than 130 s, with 94.8 % of elements well suited for FE analysis. We provide novel input for simulations by independently meshing both the arterial wall and intraluminal thrombus of the aneurysm, and their respective layered morphologies.

Keywords

Magnetic resonance imaging Abdominal aortic aneurysm Intraluminal thrombus Conforming hexahedral meshes Finite element analysis 

Notes

Acknowledgments

The authors gratefully acknowledge the financial support of the European Commission under the 7th Framework Program, Grant Agreement Number 248782.

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Copyright information

© International Federation for Medical and Biological Engineering 2013

Authors and Affiliations

  • J. Tarjuelo-Gutierrez
    • 1
    • 2
  • B. Rodriguez-Vila
    • 1
    • 2
  • D. M. Pierce
    • 3
  • T. E. Fastl
    • 3
  • P. Verbrugghe
    • 4
  • I. Fourneau
    • 4
  • G. Maleux
    • 4
  • P. Herijgers
    • 4
  • G. A. Holzapfel
    • 3
    • 5
  • E. J. Gomez
    • 1
    • 2
  1. 1.Bioengineering and Telemedicine Centre, ETSI de TelecomunicaciónUniversidad Politécnica de MadridMadridSpain
  2. 2.Networking Research Center on Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN)SaragossaSpain
  3. 3.Institute of Biomechanics, Center of Biomedical EngineeringGraz University of TechnologyGrazAustria
  4. 4.Laboratory of Experimental Cardiac Surgery, Department of Cardiovascular Diseases, Gasthuisberg University HospitalUniversity of LeuvenLouvainBelgium
  5. 5.Department of Solid Mechanics, School of Engineering SciencesRoyal Institute of Technology (KTH)StockholmSweden

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