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Brain Shift Correction Based on a Boundary Element Biomechanical Model with Different Material Properties

  • Olivier Ecabert
  • Torsten Butz
  • Arya Nabavi
  • Jean-Philippe Thiran
Part of the Lecture Notes in Computer Science book series (LNCS, volume 2878)

Abstract

Neuronavigation systems are usually subject to inaccuracy due to intraoperative changes like brain shift or tumor resection. In order to correct for these deformations a biomechanical model of the brain is proposed. Not only elastic tissues, but also fluids are modeled, since an important volume of the head contains cerebrospinal fluid, which does not behave like soft tissues. Unlike other approaches, we propose to solve the differential equations of the model by means of the boundary element method, which has the advantage of only considering the boundaries of the different biomechanically homogeneous regions. The size of the matrix to invert is therefore drastically reduced. Finally, our method is assessed with sequences of intraoperative MR images, showing better performances for the elastic/fluid model than for the purely elastic one.

Keywords

Boundary Element Method Biomechanical Model Brain Shift Neuronavigation System White Cross 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag Berlin Heidelberg 2003

Authors and Affiliations

  • Olivier Ecabert
    • 1
    • 2
  • Torsten Butz
    • 3
  • Arya Nabavi
    • 4
  • Jean-Philippe Thiran
    • 3
  1. 1.Darmstadt University of TechnologyDarmstadtGermany
  2. 2.Philips ResearchAachenGermany
  3. 3.Swiss Federal Institute of Technology (EPFL), Signal Processing InstituteLausanneSwitzerland
  4. 4.Department of NeurosurgeryUniversity of KielKielGermany

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