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Biomag 96

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

  • Conference proceedings
  • © 2000

Overview

Editors:
  1. Cheryl J. Aine

    1. Radiology Service Albuquerque, VA Medical Center, Albuquerque, USA

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  2. Gerhard Stroink

    1. Department of Physics, Dalhousie University, Halifax, Nova Scotia, Canada

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  3. Charles C. Wood

    1. Biophysics Group (P-21), MS D454, Los Alamos National Laboratory, Los Alamos, USA

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  4. Yoshio Okada

    1. Department of New Mexico School of Medicine, Albuquerque, USA

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  5. Stephen J. Swithenby

    1. Department of Physics and Astronomy, The Open University, Milton Keynes, UK

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Table of contents (289 papers)

  1. Biomagnetic Instrumentation

    1. High Tc Superconducting Shielded Biomagnetometer System

      • H. Matsuba, K. Shintomi, A. Yahara, K. Imai, D. Irisawa, M. Masuda
      Pages 75-78

    2. Current Dipole Localization Errors as a Function of the System Noise and the Number of Sensors

      • H. Matsuba, J. Vrba, T. Cheung
      Pages 79-82

    3. Auditory Brainstem Evoked Fields Measured in a High Tc Superconducting Shield

      • T. Nogai, A. Yahara, H. Matsuba, S. Kuriki
      Pages 83-86

    4. High Performance Magnetically Shielded Room for Clinical Measurements

      • M. A. J. Paavola, R. J. Ilmoniemi, L. Sohlström, T. Meinander, A. Penttinen, T. E. Katila
      Pages 87-90

    5. An AC Susceptometer with a Large Magnetised Volume for Biological Samples

      • A. Pasquarelli, C. Del Gratta, S. Della Penna, S. Di Luzio, V. Pizzella, G. L. Romani
      Pages 91-94

    6. A Six-Channel SQUID Biomagnetometer Optimised for Fetal Magnetocardiography

      • D. Rassi, Y. E. Zhuravlev, O. Josephs, S. J. Swithenby
      Pages 95-98

    7. High Temperature Superconducting Quantum Interference Devices in a Superconductor-Normal-Superconductor Geometry

      • D. Reagor, Q. X. Jia, C. Mombourquette, S. Foltyn, R. Houlton, X. D. Wu
      Pages 99-102

    8. A Digital SQUID Controller for Unshielded Biomagnetic Measurements

      • S. E. Robinson
      Pages 103-106

    9. Investigation of the Thin Film SQUIDs Using Double Layer Model of the Secondary Sources

      • S. S. Romanovych
      Pages 107-109

    10. DC-MEG Studies: Development of Techniques for Resolving DC Fields

      • U. Saligram, J. E. Moran, N. Tepley
      Pages 110-113

    11. Development of a 61-Channel MEG System Cooled by a GM/JT Cryocooler

      • K. Sata, S. Fujimoto, N. Fukui, E. Haraguchi, T. Kido, N. Nishiguchi et al.
      Pages 114-117

    12. Low-Noise, Single Layer YBa2Cu3O7−δ DC SQUID Magnetometers for Shielded and Unshielded Operation

      • J. M. Schmidt, L. P. Lee, A. Matlashov, M. Teepe, V. Vinetskiy, R. Cantor et al.
      Pages 118-121

    13. The Use of Software Magnetometers for Ambient Magnetic Noise Cancellation in Unshielded Environment

      • A. V. Shabalin, N. V. Golyshev, Ya. S. Greenberg, S. V. Motorin, B. M. Rogachevskij
      Pages 122-125

    14. The Use of a Current Feedback Loop for Active Compensation of Magnetic Noise in Superconducting Magnetocardiograph

      • A. V. Shabalin, N. V. Golyshev, S. V. Motorin, B. M. Rogatchevskij
      Pages 126-129

    15. A Skull-Based Multiple Dipole Phantom for EEG and MEG Studies

      • M. E. Spencer, R. M. Leahy, J. C. Mosher
      Pages 130-133

    16. High-Tc SQUID Gradiometers for Magnetocardiography in an Unshielded Environment

      • N. Tralshawala, J. R. Claycomb, Q. Ying, J. H. Miller Jr., K. Nesteruk, D. R. Jackson
      Pages 134-137

    17. 143 Channel Whole-Cortex MEG System

      • J. Vrba, V. Angus, K. Betts, M. B. Burbank, T. Cheung, A. A. Fife et al.
      Pages 138-141

    18. SEFs from the Human Spinal Cord using a Novel Second Order Planar Gradiometer

      • A. I. Weir, U. Shahani, D. Hutson, G. Lang, P. M. Maas, C. M. Pegrum et al.
      Pages 142-145

    19. High-Tc Superconducting rf Receiver Coils for High Resolution Magnetic Resonance Imaging of the Spine

      • J. Wosik, K. Nesteruk, L. M. Xie, X. P. Zhang, C. Jiao, P. Gierlowski et al.
      Pages 146-149

    20. 3-D Magnetic Field Analysis of a Magnetically Shielded Room for Biomagnetic Measurements

      • K. Yamazaki, Y. Uchikawa, K. Fujiwara
      Pages 150-153
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Keywords

About this book

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.

Editors and Affiliations

  • Radiology Service Albuquerque, VA Medical Center, Albuquerque, USA

    Cheryl J. Aine

  • Department of Physics, Dalhousie University, Halifax, Nova Scotia, Canada

    Gerhard Stroink

  • Biophysics Group (P-21), MS D454, Los Alamos National Laboratory, Los Alamos, USA

    Charles C. Wood

  • Department of New Mexico School of Medicine, Albuquerque, USA

    Yoshio Okada

  • Department of Physics and Astronomy, The Open University, Milton Keynes, UK

    Stephen J. Swithenby

Bibliographic Information

  • Book Title: Biomag 96

  • Book Subtitle: Volume 1/Volume 2 Proceedings of the Tenth International Conference on Biomagnetism

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

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

  • Publisher: Springer New York, NY

  • eBook Packages: Springer Book Archive

  • Copyright Information: Springer Science+Business Media New York 2000

  • Hardcover ISBN: 978-0-387-98915-0Due: 16 June 2000

  • Softcover ISBN: 978-1-4612-7066-9Published: 20 April 2013

  • eBook ISBN: 978-1-4612-1260-7Published: 11 November 2013

  • Edition Number: 1

  • Number of Pages: LXVIII, 1185

  • Number of Illustrations: 370 illustrations in colour

  • Topics: Physics, general

  • Industry Sectors: Energy, Utilities & Environment, Engineering

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