Direct calculation of the electrode movement Jacobian for 3D EIT

  • Camille Gómez-Laberge
  • Andy Adler
Part of the IFMBE Proceedings book series (IFMBE, volume 17)


Electrical Impedance Tomography (EIT) of media with deformable boundaries is very sensitive to electrode movement. This is especially important for EIT images of the thorax, which become distorted with breathing and posture change. Previously, we proposed a reconstruction method for imaging conductivity change and electrode movement based on an indirect pertturbation Jacobian calculation, involving the re-computation of the foward solution. Altough suitable for 2D and small 3D imaging,the reconstruction accuracy of this method gradually decreases, while the computation time grows rapidly for large 3D problems. We propose an efficient, novel method of calculating the Jacobian matrix directly from the Finite Element Method (FEM) system equations, without the re-calculation of the forward solution.


Finite Element Method Electrical Impedance Tomography Finite Element Method Model Conductivity Distribution Admittance Matrix 
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Copyright information

© Springer-Verlag Berlin Heidelberg 2007

Authors and Affiliations

  • Camille Gómez-Laberge
    • 1
  • Andy Adler
    • 1
  1. 1.Systems and Computer EngineeringCarleton UniversityOttawaCanada

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