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Separation of Overlapping Sources Induced by Mixed Stimulations Using 3-Dimensional MEG Mappings

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Biomag 96

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Abstract

There is a problem of separating multi-sources overlapping in time when many distinct areas of the cortex are active. Several methods for evaluating source localization from spatio-temporal MEG data have been reported[1],[2],[3],[4]. Almost all SQUID magnetometers for MEG study are for measuring magnetic field perpendicular to the scalp. There is a limitation in spatial resolution, using flux-detection coils with finite radius in regular devices, to separate multi-sources [5]. To get more accurate information about source configuration, we have proposed a new 3-D measurement of MEG, namely vector magnetoencephalogram [6].

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References

  1. Smith, W. E., Estimation of the Spatio-Temporal Correlations of Biological Electrical Sources from Their Magnetic Fields, IEEE Trans. Biomed. Engng., 1992, 39: 997–1004.

    Article  Google Scholar 

  2. Baumgartner, C., Sutherling, W. W., Shi Di and Barth, D.S., Spatiotemporal modeling of cerebral evoked magnetic fields to median nerve stimulation, Electroencephalography and clinical Neurophysiology, 1991, 79: 27–35.

    Article  Google Scholar 

  3. Achim, A., Richer, F. and Saint-Hilaire, J.M., Methodological considerations for the evaluation of spatio-temporal source models, Electroencephalography and clinical Neurophysiology, 1991, 79: 227–240.

    Article  Google Scholar 

  4. Achim, A., and Richer, F., Methods for Separating Temporally Overlapping Sources of Neuroelectric Data, Brain Topography, 1988, 1: 22–28.

    Article  Google Scholar 

  5. Okada, Y., Discrimination of localized and distributed current dipole sources and localized single and multiple sources, Biomagnetism:Applications and Theory, ed. by H. Weinberg, G. Strolnk, T. Katila, 1985: 266–272.

    Google Scholar 

  6. Uchikawa, Y., Matsumura, F., Kobayashi, K. and Kotani, M., Application to Discrimination of Multi-Sources to Somatosensory Evoked field using 3-Dimensional second-order gradiometer, In: Deecke, L., Baumgartner, C., Stroink, G. and Williamson, S.J. (eds.), Biomagnetism: Fundamental research and clinical application, 1993: 219–220.

    Google Scholar 

  7. Ahonen, A., Hamalainen, M., Kajola, M., Knuutila, J., Lounasmaa, O., Simola, J., Tesche, C., and Vilkman, V., Multichannel SQUID systems for brain research, IEEE Trans. Magn., 1991, 27: 2786–2792.

    Article  ADS  Google Scholar 

  8. Cohen, D., Proc. 12th Intern. Conf. on Med. and Bio. Eng., Jerusalem, Israel, 1979.

    Google Scholar 

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Author information

Authors and Affiliations

  1. Faculty of Science and Engineering, Tokyo Denki University, Saitama, 350-03, Japan

    Y. Uchikawa, K. Kobayashi & K. Sakawa

  2. Faculty of Engineering, Tokyo Denki University, Chiyodaku, Tokyo, 101, Japan

    M. Kotani

Authors
  1. Y. Uchikawa
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  2. K. Kobayashi
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  3. K. Sakawa
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  4. M. Kotani
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Editor information

Editors and Affiliations

  1. Radiology Service Albuquerque, VA Medical Center, Building 49, 114M 1501 San Pedro SE, Albuquerque, NM, 87108, USA

    Cheryl J. Aine

  2. Department of Physics, Dalhousie University, Halifax, Nova Scotia, Canada, B3H 3J5

    Gerhard Stroink

  3. Biophysics Group (P-21), MS D454, Los Alamos National Laboratory, P.O. Box 1663, Los Alamos, NM, 87545, USA

    Charles C. Wood

  4. Department of New Mexico School of Medicine, Albuquerque, NM, 87131, USA

    Yoshio Okada

  5. Department of Physics and Astronomy, The Open University, Milton Keynes, MK7 6AA, UK

    Stephen J. Swithenby

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© 2000 Springer Science+Business Media New York

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Uchikawa, Y., Kobayashi, K., Sakawa, K., Kotani, M. (2000). Separation of Overlapping Sources Induced by Mixed Stimulations Using 3-Dimensional MEG Mappings. In: Aine, C.J., Stroink, G., Wood, C.C., Okada, Y., Swithenby, S.J. (eds) Biomag 96. Springer, New York, NY. https://doi.org/10.1007/978-1-4612-1260-7_220

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  • DOI: https://doi.org/10.1007/978-1-4612-1260-7_220

  • Publisher Name: Springer, New York, NY

  • Print ISBN: 978-1-4612-7066-9

  • Online ISBN: 978-1-4612-1260-7

  • eBook Packages: Springer Book Archive

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