Magnetic Resonance Electrical Impedance Tomography For Anisotropic Conductivity Imaging

Date

2008-11-27

Author

Degirmenci, E.
Eyüboğlu, Behçet Murat

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Magnetic Resonance Electrical Impedance Tomography (MREIT) brings high resolution imaging of true conductivity distribution to reality. MREIT images are reconstructed based on measurements of current density distribution and a surface potential value, induced by an externally applied current flow. Since biological tissues may be anisotropic, isotropic conductivity assumption, as it is adopted in most of MREIT reconstruction algorithms, introduces reconstruction inaccuracy. In this study, a novel algorithm is proposed to reconstruct MREIT images of anisotropic conductivity. Relative values of anisotropic conductivity are reconstructed iteratively, using only measurement of current density distribution. By measuring a surface potential or a conductivity value, true values of anisotropic conductivity can be recovered. The technique is evaluated based on simulated measurements with and without additive noise. The results show that anisotropic and isotropic conductivity distributions can be reconstructed, successfully.

Subject Keywords

Tomography, Imaging, Anisotropic conductivity, Magnetic resonance, Impedance

URI

https://hdl.handle.net/11511/55469

Conference Name

4th European Conference of the International Federation for Medical and Biological Engineering (ECIFMBE)

Collections

Department of Electrical and Electronics Engineering, Conference / Seminar

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Anisotropic Conductivity Imaging with MREIT Using J-substitution and Hybrid J-substitution Algorithms Degirmenci, E.; Eyüboğlu, Behçet Murat (2009-09-12) Magnetic Resonance Electrical Impedance Tomography (MREIT) is a tomographical imaging technique which uses measurements of magnetic flux density induced by a probing current to reconstruct electrical conductivity distribution within a conductor object with magnetic resonance active nuclei. In this study, two novel anisotropic conductivity reconstruction algorithms for MREIT are proposed. The technique is evaluated with simulated measurements.
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Citation Formats

E. Degirmenci and B. M. Eyüboğlu, “Magnetic Resonance Electrical Impedance Tomography For Anisotropic Conductivity Imaging,” Antwerp, BELGIUM, 2008, vol. 22, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/55469.