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Computational and Mathematical Methods in Medicine
Volume 2013, Article ID 381507, 9 pages
http://dx.doi.org/10.1155/2013/381507
Research Article

Current Density Imaging Using Directly Measured Harmonic Data in MREIT

Department of Mathematics, Konkuk University, Seoul 143-701, Republic of Korea

Received 12 December 2012; Accepted 16 February 2013

Academic Editor: Ulrich Katscher

Copyright © 2013 Chunjae Park and Oh In Kwon. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Linked References

  1. Y. Z. Ider and O. Birgul, “Use of the magnetic field generated by the internal distribution of injected currents for Electrical Impedance Tomography (MR-EIT),” Elektrik, vol. 6, no. 3, pp. 215–225, 1998. View at Google Scholar
  2. O. I. Kwon, E. J. Woo, J. R. Yoon, and J. K. Seo, “Magnetic resonance electrical impedance tomography (MREIT): simulation study of J-substitution algorithm,” IEEE Transactions on Biomedical Engineering, vol. 49, no. 2, pp. 160–167, 2002. View at Publisher · View at Google Scholar · View at Scopus
  3. Y. Z. Ider, S. Onart, and W. R. B. Lionheart, “Uniqueness and reconstruction in magnetic resonance-electrical impedance tomography (MR-EIT),” Physiological Measurement, vol. 24, no. 2, pp. 591–604, 2003. View at Publisher · View at Google Scholar · View at Scopus
  4. O. Birgul, B. M. Eyuboglu, and Y. Z. Ider, “Current constrained voltage scaled reconstruction (CCVSR) algorithm for MR-EIT and its performance with different probing current patterns,” Physics in Medicine and Biology, vol. 48, no. 5, pp. 653–671, 2003. View at Publisher · View at Google Scholar · View at Scopus
  5. S. H. Oh, B. I. Lee, E. J. Woo et al., “Conductivity and current density image reconstruction using harmonic Bz algorithm in magnetic resonance electrical impedence tomography,” Physics in Medicine and Biology, vol. 48, no. 19, pp. 3101–3116, 2003. View at Publisher · View at Google Scholar · View at Scopus
  6. J. K. Seo, J. R. Yoon, E. J. Woo, and O. I. Kwon, “Reconstruction of conductivity and current density images using only one component of magnetic field measurements,” IEEE Transactions on Biomedical Engineering, vol. 50, no. 9, pp. 1121–1124, 2003. View at Publisher · View at Google Scholar · View at Scopus
  7. M. L. G. Joy, “MR current density and conductivity imaging: the state of the art Proc,” in Proceedings of the 26th Annual International Conference of the IEEE Engineering in Medicine and Biology Society (EMBS '04), pp. 5315–5319, San Francisco, Calif, USA, 2004.
  8. L. T. Muftuler, M. Hamamura, O. Birgul, and O. Nalcioglu, “Resolution and contrast in magnetic resonance electrical impedance tomography (MREIT) and its application to cancer imaging,” Technology in Cancer Research and Treatment, vol. 3, no. 6, pp. 599–609, 2004. View at Google Scholar · View at Scopus
  9. M. Ozdemir, B. M. Eyuboglu, and O. Ozbek, “Equipotential projection-based magnetic resonance electrical impedence tomography and experimental realization,” Physics in Medicine and Biology, vol. 49, no. 20, pp. 4765–4783, 2004. View at Publisher · View at Google Scholar · View at Scopus
  10. C. Park, O. Kwon, E. J. Woo, and J. K. Seo, “Electrical conductivity imaging using gradient Bz decomposition algorithm in Magnetic Resonance Electrical Impedance Tomography (MREIT),” IEEE Transactions on Medical Imaging, vol. 23, no. 3, pp. 388–394, 2004. View at Publisher · View at Google Scholar · View at Scopus
  11. J. K. Seo, H. C. Pyo, C. J. Park, O. I. Kwon, and E. J. Woo, “Image reconstruction of anisotropic conductivity tensor distribution in MREIT: computer simulation study,” Physics in Medicine and Biology, vol. 49, no. 18, pp. 4371–4382, 2004. View at Publisher · View at Google Scholar · View at Scopus
  12. S. H. Oh, B. I. Lee, E. J. Woo et al., “Electrical conductivity images of biological tissue phantoms in MREIT,” Physiological Measurement, vol. 26, no. 2, pp. S279–S288, 2005. View at Publisher · View at Google Scholar · View at Scopus
  13. N. Gao, S. A. Zhu, and B. A. He, “A new magnetic resonance electrical impedance tomography (MREIT) algorithm: the RSM-MREIT algorithm with applications to estimation of human head conductivity,” Physics in Medicine and Biology, vol. 51, no. 12, pp. 3067–3083, 2006. View at Publisher · View at Google Scholar · View at Scopus
  14. O. Birgul, M. J. Hamamura, L. T. Muftuler, and O. Nalcioglu, “Contrast and spatial resolution in MREIT using low amplitude current,” Physics in Medicine and Biology, vol. 51, no. 19, pp. 5035–5049, 2006. View at Publisher · View at Google Scholar · View at Scopus
  15. M. J. Hamamura, L. Tugan Muftuler, O. Birgul, and O. Nalcioglu, “Measurement of ion diffusion using magnetic resonance electrical impedance tomography,” Physics in Medicine and Biology, vol. 51, no. 11, pp. 2753–2762, 2006. View at Publisher · View at Google Scholar · View at Scopus
  16. M. J. Hamamura and L. T. Muftuler, “Fast imaging for magnetic resonance electrical impedance tomography,” Magnetic Resonance Imaging, vol. 26, no. 6, pp. 739–745, 2008. View at Publisher · View at Google Scholar · View at Scopus
  17. E. J. Woo and J. K. Seo, “Magnetic resonance electrical impedance tomography (MREIT) for high-resolution conductivity imaging,” Physiological Measurement, vol. 29, no. 10, pp. R1–R26, 2008. View at Publisher · View at Google Scholar · View at Scopus
  18. H. J. Kim, Y. T. Kim, A. S. Minhas et al., “In vivo high-resolution conductivity imaging of the human leg using MREIT: the first human experiment,” IEEE Transactions on Medical Imaging, vol. 28, no. 11, pp. 1681–1687, 2009. View at Publisher · View at Google Scholar · View at Scopus
  19. H. J. Kim, T. I. Oh, Y. T. Kim et al., “In vivo electrical conductivity imaging of a canine brain using a 3 T MREIT system,” Physiological Measurement, vol. 29, no. 10, pp. 1145–1155, 2008. View at Publisher · View at Google Scholar · View at Scopus
  20. C. Park, B. I. Lee, O. I. Kwon, and E. J. Woo, “Measurement of induced magnetic flux density using injection current nonlinear encoding (ICNE) in MREIT,” Physiological Measurement, vol. 28, no. 2, pp. 117–127, 2007. View at Publisher · View at Google Scholar · View at Scopus
  21. H. S. Nam and O. I. Kwon, “Optimization of multiply acquired magnetic flux density Bz using ICNE-Multiecho train in MREIT,” Physics in Medicine and Biology, vol. 55, no. 9, pp. 2743–2759, 2010. View at Publisher · View at Google Scholar · View at Scopus
  22. H. M. Park, H. S. Nam, and O. I. Kwon, “Magnetic flux density reconstruction using interleaved partial Fourier acquisitions in MREIT,” Physics in Medicine and Biology, vol. 56, no. 7, pp. 2059–2073, 2011. View at Publisher · View at Google Scholar · View at Scopus
  23. P. A. Bandettini, E. C. Wong, R. S. Hinks, R. S. Tikofsky, and J. S. Hyde, “Time course EPI of human brain function during task activation,” Magnetic Resonance in Medicine, vol. 25, no. 2, pp. 390–397, 1992. View at Google Scholar · View at Scopus
  24. R. B. Buxton, E. C. Wong, and L. R. Frank, “Dynamics of blood flow and oxygenation changes during brain activation: the balloon model,” Magnetic Resonance in Medicine, vol. 39, no. 6, pp. 855–864, 1998. View at Publisher · View at Google Scholar · View at Scopus
  25. N. K. Logothetis, “What we can do and what we cannot do with fMRI,” Nature, vol. 453, no. 7197, pp. 869–878, 2008. View at Publisher · View at Google Scholar · View at Scopus
  26. R. J. Sadleir, S. C. Grant, and E. J. Woo, “Can high-field MREIT be used to directly detect neural activity? Theoretical considerations,” NeuroImage, vol. 52, no. 1, pp. 205–216, 2010. View at Publisher · View at Google Scholar · View at Scopus
  27. C. Park, B. I. Lee, and O. I. Kwon, “Analysis of recoverable current from one component of magnetic flux density in MREIT and MRCDI,” Physics in Medicine and Biology, vol. 52, no. 11, pp. 3001–3013, 2007. View at Publisher · View at Google Scholar · View at Scopus
  28. G. C. Scott, M. L. G. Joy, R. L. Armstrong, and R. M. Henkelman, “Sensitivity of magnetic-resonance current-density imaging,” Journal of Magnetic Resonance, vol. 97, no. 2, pp. 235–254, 1992. View at Google Scholar · View at Scopus
  29. R. J. Sadleir, S. C. Grant, and E. J. Woo, “Can high-field MREIT be used to directly detect neural activity? Theoretical considerations,” NeuroImage, vol. 52, no. 1, pp. 205–216, 2005. View at Google Scholar · View at Scopus
  30. O. I. Kwon, B. I. Lee, H. S. Nam, and C. Park, “Noise analysis and MR pulse sequence optimization in MREIT using an injected current nonlinear encoding (ICNE) method,” Physiological Measurement, vol. 28, no. 11, pp. 1391–1404, 2007. View at Google Scholar
  31. G. C. Scott, M. L. G. Joy, R. L. Armstrong, and R. M. Henkelman, “Measurement of nonuniform current density by magnetic resonance,” IEEE Transactions on Medical Imaging, vol. 10, no. 3, pp. 362–374, 1991. View at Publisher · View at Google Scholar · View at Scopus
  32. L. T. Muftuler, G. Chen, M. J. Hamamura, and S. H. Ha, “MREIT with SENSE acceleration using a dedicated RF coil design,” Physiological Measurement, vol. 30, no. 9, pp. 913–929, 2009. View at Publisher · View at Google Scholar · View at Scopus