Conductivity and Current Density Image Reconstruction in MREIT using Harmonic Bz Algorithm and Recessed Electrodes

S. H. Oh, B. I. Lee, E. J. Woo, S. Y. Lee, M. H. Cho, O. Kwon, J. K. Seo, W. S. Baek

Research output: Contribution to journalConference article

Abstract

This paper presents cross-sectional conductivity and current density images of an inhomogeneous saline phantom. Using a 0.3 Tesla MRI scanner with its main magnetic field in the z-direction, we measured the z-component of the induced magnetic flux density Bz due to multiple injection currents. Four recessed electrodes are used to inject six different currents without producing artifacts near the boundary of the imaging subject. We used an image reconstruction algorithm called ∇2Bz algorithm to reconstruct images with a spatial resolution of 82×82 pixels (0.6×0.6 mm2/pixel). The accuracy of the reconstructed image was estimated as 13.8 to 21.5% in terms of the relative L2-error over all pixels.

Original languageEnglish
Pages (from-to)1023-1026
Number of pages4
JournalAnnual International Conference of the IEEE Engineering in Medicine and Biology - Proceedings
Volume2
Publication statusPublished - 2003
EventA New Beginning for Human Health: Proceddings of the 25th Annual International Conference of the IEEE Engineering in Medicine and Biology Society - Cancun, Mexico
Duration: 2003 Sep 172003 Sep 21

All Science Journal Classification (ASJC) codes

  • Signal Processing
  • Biomedical Engineering
  • Computer Vision and Pattern Recognition
  • Health Informatics

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