Javascript verkar inte påslaget? - Vissa delar av Lunds universitets webbplats fungerar inte optimalt utan javascript, kontrollera din webbläsares inställningar.
Du är här

Fisher information analysis and preconditioning in electrical impedance tomography

  • Sven Nordebo
  • Richard Bayford
  • Bengt Bengtsson
  • Andreas Fhager
  • Mats Gustafsson
  • Parham Hashemzadeh
  • Börje Nilsson
  • Thomas Rylander
  • Therese Sjöden
Publiceringsår: 2010
Språk: Engelska
Sidor: 012057-012057
Publikation/Tidskrift/Serie: Journal of Physics: Conference Series
Volym: 224
Nummer: 1
Dokumenttyp: Konferensbidrag
Förlag: IOP Publishing


N this contribution, it is described how the Fisher information can be computed by using adjoint field techniques, and integrated with the gradient calculations used for optimization in electrical impedance tomography. In particular, the Fisher information can be used as a preconditioner to obtain improved convergence properties and a regularization for quasi-Newton optimization algorithms in electrical impedance tomography. Experimental data have been used to study the possibility of combining a good reconstruction quality with a low system complexity, which is achieved by using a four-electrode measurement technique to avoid the need of high-precision electrode modeling and allowing a very coarse FEM grid. Here, the Fisher information based preconditioning implies a regularization and an algorithm that works well on a coarse FEM grid with very small electrodes modeled as point sources.


  • Electrical Engineering, Electronic Engineering, Information Engineering


XIV International Conference on Electrical Bioimpedance and 11th Conference on Biomedical Applications of Electrical Impedance Tomography
  • Electromagnetic theory-lup-obsolete

Box 117, 221 00 LUND
Telefon 046-222 00 00 (växel)
Telefax 046-222 47 20
lu [at] lu [dot] se

Fakturaadress: Box 188, 221 00 LUND
Organisationsnummer: 202100-3211
Om webbplatsen