• About
  • Policies
  • What is openaccess
  • Library
  • Contact
Advanced search
      View Item 
      •   BUIR Home
      • Scholarly Publications
      • Faculty of Engineering
      • Department of Electrical and Electronics Engineering
      • View Item
      •   BUIR Home
      • Scholarly Publications
      • Faculty of Engineering
      • Department of Electrical and Electronics Engineering
      • View Item
      JavaScript is disabled for your browser. Some features of this site may not work without it.

      Algebraic reconstraction for 3D magnetic resonance-electrical impedance tomography (MREIT) using one component of magnetic flux density

      Thumbnail
      View / Download
      371.7 Kb
      Author
      Ider, Y. Z.
      Onart, S.
      Date
      2004
      Source Title
      Physiological Measurement
      Print ISSN
      0967-3334
      Publisher
      Institute of Physics and Engineering in Medicine
      Volume
      25
      Issue
      1
      Pages
      281 - 294
      Language
      English
      Type
      Article
      Item Usage Stats
      76
      views
      86
      downloads
      Metadata
      Show full item record
      Abstract
      Magnetic resonance-electrical impedance tomography (MREIT) algorithms fall into two categories: those utilizing internal current density and those utilizing only one component of measured magnetic flux density. The latter group of algorithms have the advantage that the object does not have to be rotated in the magnetic resonance imaging (MRI) system. A new algorithm which uses only one component of measured magnetic flux density is developed. In this method, the imaging problem is formulated as the solution of a non-linear matrix equation which is solved iteratively to reconstruct resistivity. Numerical simulations are performed to test the algorithm both for noise-free and noisy cases. The uniqueness of the solution is monitored by looking at the singular value behavior of the matrix and it is shown that at least two current injection profiles are necessary. The method is also modified to handle region-of-interest reconstructions. In particular it is shown that, if the image of a certain xy-slice is sought for, then it suffices to measure the z-component of magnetic flux density up to a distance above and below that slice. The method is robust and has good convergence behavior for the simulation phantoms used.
      Keywords
      Bz based algorithm
      EIT
      Finite element method
      Magnetic resonance-electrical impedance tomography
      MREIT
      Algorithm
      Computer assisted impedance tomography
      Computer simulation
      Electric current
      Finite element analysis
      Image reconstruction
      Imaging system
      Magnetic field
      Mathematical analysis
      Nuclear magnetic resonance imaging
      Phantom
      Priority journal
      Signal noise ratio
      Three dimensional imaging
      Three dimensional magnetic resonance electrical impedance tomography
      Impedance
      Instrumentation
      Methodology
      Theoretical model
      Tomography
      Electric Impedance
      Magnetics
      Models
      Radiation
      Theoretical
      Permalink
      http://hdl.handle.net/11693/27466
      Published Version (Please cite this version)
      https://doi.org/10.1088/0967-3334/25/1/032
      Collections
      • Department of Electrical and Electronics Engineering 3337

      Related items

      Showing items related by title, author, creator and subject.

      • Thumbnail

        Convection-reaction equation based magnetic resonance electrical properties tomography (cr-MREPT) 

        Hafalir, F. S.; Oran, O. F.; Gurler, N.; Ider, Y. Z. (Institute of Electrical and Electronics Engineers Inc., 2014)
        Images of electrical conductivity and permittivity of tissues may be used for diagnostic purposes as well as for estimating local specific absorption rate distributions. Magnetic resonance electrical properties tomography ...
      • Thumbnail

        Magnetic resonance electrical impedance tomography (MREIT) based on the solution of the convection equation using FEM with stabilization 

        Oran, O. F.; Ider, Y. Z. (Institute of Physics Publishing, 2012-07-27)
        Most algorithms for magnetic resonance electrical impedance tomography (MREIT) concentrate on reconstructing the internal conductivity distribution of a conductive object from the Laplacian of only one component of the ...
      • Thumbnail

        Experimental results for 2D magnetic resonance electrical impedance tomography (MR-EIT) using magnetic flux density in one direction 

        Birgül, Ö.; Eyüboğlu, B. M.; İder, Y. Z. (Institute of Physics Publishing, 2003)
        Magnetic resonance electrical impedance tomography (MR-EIT) is an emerging imaging technique that reconstructs conductivity images using magnetic flux density measurements acquired employing MRI together with conventional ...

      Browse

      All of BUIRCommunities & CollectionsTitlesAuthorsAdvisorsBy Issue DateKeywordsTypeDepartmentsThis CollectionTitlesAuthorsAdvisorsBy Issue DateKeywordsTypeDepartments

      My Account

      Login

      Statistics

      View Usage Statistics

      Bilkent University

      If you have trouble accessing this page and need to request an alternate format, contact the site administrator. Phone: (312) 290 1771
      Copyright © Bilkent University | Library IT

      Contact Us | Send Feedback | Off-Campus Access | Admin