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Biomag 96

Volume 1/Volume 2 Proceedings of the Tenth International Conference on Biomagnetism

  • Cheryl J. Aine
  • Gerhard Stroink
  • Charles C. Wood
  • Yoshio Okada
  • Stephen J. Swithenby

Table of contents

  1. Front Matter
    Pages i-xxxiii
  2. Biomagnetic Instrumentation

    1. Front Matter
      Pages 1-1
    2. G. R. Barnes, A. A. Ioannides
      Pages 7-10
    3. M. Borchardt, E. Krause, G. Lindner
      Pages 11-14
    4. R. Cantor, V. Vinetskiy, A. Matlashov
      Pages 15-19
    5. C. A. Copetti, H. Soltner, Y. Zhang, H. Schuett, H. Rongen, G. Brandenburg et al.
      Pages 20-23
    6. E. Costa Monteiro, C. Kelber, E. Andrade Lima, P. Costa Ribeiro, A. C. Bruno, C. Hall Barbosa et al.
      Pages 28-31
    7. J. Dammers, G. R. Barnes, F. Weise, J. Gross, B. S. Clewett, A. A. Ioannides et al.
      Pages 32-34
    8. C. R. Davidson, R. H. Griffin, K. J. Best, L. Maltin, W. Wolf, Y. Zhang et al.
      Pages 35-38
    9. E. R. Flynn, R. Bracht, R. H. Kraus Jr., P. M. Maas, P. Ruminer, M. Stettler
      Pages 39-42
    10. S. Fujimoto, K. Sata, N. Fukui, E. Haraguchi, T. Kido, K. Nishiguchi et al.
      Pages 43-46
    11. H. Itozaki, H. Kugai, T. Nagaishi, H. Toyoda, T. Hirano, Y. Haruta et al.
      Pages 55-58
    12. R. T. Johnson, W. C. Black, D. S. Buchanan
      Pages 59-62
    13. R. H. Kraus Jr., R. Bracht, E. R. Flynn, Q. Jia, P. M. Maas, D. Reagor et al.
      Pages 63-66
    14. G. Lang, D. Hutson, R. G. Weston, U. Klein, U. Shahani, A. I. Weir et al.
      Pages 67-70
    15. H. Matsuba, K. Shintomi, A. Yahara, K. Imai, D. Irisawa, M. Masuda
      Pages 75-78
    16. T. Nogai, A. Yahara, H. Matsuba, S. Kuriki
      Pages 83-86
    17. M. A. J. Paavola, R. J. Ilmoniemi, L. Sohlström, T. Meinander, A. Penttinen, T. E. Katila
      Pages 87-90
    18. A. Pasquarelli, C. Del Gratta, S. Della Penna, S. Di Luzio, V. Pizzella, G. L. Romani
      Pages 91-94
    19. D. Rassi, Y. E. Zhuravlev, O. Josephs, S. J. Swithenby
      Pages 95-98
    20. D. Reagor, Q. X. Jia, C. Mombourquette, S. Foltyn, R. Houlton, X. D. Wu
      Pages 99-102
    21. U. Saligram, J. E. Moran, N. Tepley
      Pages 110-113
    22. K. Sata, S. Fujimoto, N. Fukui, E. Haraguchi, T. Kido, N. Nishiguchi et al.
      Pages 114-117
    23. J. M. Schmidt, L. P. Lee, A. Matlashov, M. Teepe, V. Vinetskiy, R. Cantor et al.
      Pages 118-121
    24. A. V. Shabalin, N. V. Golyshev, Ya. S. Greenberg, S. V. Motorin, B. M. Rogachevskij
      Pages 122-125
    25. A. V. Shabalin, N. V. Golyshev, S. V. Motorin, B. M. Rogatchevskij
      Pages 126-129
    26. M. E. Spencer, R. M. Leahy, J. C. Mosher
      Pages 130-133
    27. N. Tralshawala, J. R. Claycomb, Q. Ying, J. H. Miller Jr., K. Nesteruk, D. R. Jackson
      Pages 134-137
    28. J. Vrba, V. Angus, K. Betts, M. B. Burbank, T. Cheung, A. A. Fife et al.
      Pages 138-141
    29. A. I. Weir, U. Shahani, D. Hutson, G. Lang, P. M. Maas, C. M. Pegrum et al.
      Pages 142-145
    30. J. Wosik, K. Nesteruk, L. M. Xie, X. P. Zhang, C. Jiao, P. Gierlowski et al.
      Pages 146-149
    31. Y. Yoshida, A. Arakawa, Y. Kondo, S. Kajihara, S. Tomita, T. Tomita et al.
      Pages 154-157
    32. Y. Zhang, H. Schütt, H. Bousack, W. Wolf, A. Schirdewan, M. Burghoff et al.
      Pages 158-161
  3. Models For The Biomagnetic Forward and Inverse Problems

    1. Front Matter
      Pages 162-162
    2. B. Lütkenhöner, R. Greenblatt, M. Hämäläinen, J. Mosher, M. Scherg, C. Tesche et al.
      Pages 163-176
    3. H. Brauer, M. Ziolkowski, U. Tenner, O. Kosch, H. Wiechmann, A. Arlt
      Pages 181-184
    4. M. Brio, D. Marchesin, E. Costa Monteiro, A. C. Bruno, P. Costa Ribeiro
      Pages 185-188
    5. R. Casanova, P. Valdes-Sosa, F. M. Garcia, E. Aubert, J. J. Riera, W. Korin et al.
      Pages 189-192
    6. Y. C. Clifton, J. E. Moran, N. Tepley
      Pages 193-196

About these proceedings

Introduction

A modified Linear Estimation Approach was performed to reconstruct current sources within the heart. Based on MRI data sets the Boundary Element Method was used to create tailored multicompartment models of the human thorax which were used to solve the forward problem of magnetocardiography. The ability of the proposed method was demonstrated for the localization of a single current dipole as an example of a focal source. By means of introducing small shiftings to all reconstruction dipoles during linear estimation solution as well as performing a successive focussing strategy ignoring places without significant electrical activity the method could easily be extended to the reconstruction of real 3D sources. Based on a special minimum-norm solution the source volume can be estimated applying a finite element approximation using cube elements. The size of an extended current source can be estimated by superimposing the reconstructed dipoles to an equivalent dipole and comparing the corresponding volume with the sphere which would be related to the equivalent dipole. The deviation of these volumes can be taken as a criterion for non-dipolarity of sources.

Keywords

imaging magnetic fields magnetism magnetocardiography tissue

Editors and affiliations

  • Cheryl J. Aine
    • 1
  • Gerhard Stroink
    • 2
  • Charles C. Wood
    • 3
  • Yoshio Okada
    • 4
  • Stephen J. Swithenby
    • 5
  1. 1.Radiology Service AlbuquerqueVA Medical CenterAlbuquerqueUSA
  2. 2.Department of PhysicsDalhousie UniversityHalifax, Nova ScotiaCanada
  3. 3.Biophysics Group (P-21), MS D454Los Alamos National LaboratoryLos AlamosUSA
  4. 4.Department of New Mexico School of MedicineAlbuquerqueUSA
  5. 5.Department of Physics and AstronomyThe Open UniversityMilton KeynesUK

Bibliographic information