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An iso-integral mapping technique using magnetocardiogram, and its possible use for diagnosis of ischemic heart disease

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Abstract

We have developed an iso-integral mapping technique that uses magneto-cardiogram (MCG) data to obtain a map as projected total current image on the torso from the heart. We have also investigated the applicability of iso-integral mapping to the diagnosis of ischemic heart disease. We simulated and measured the characteristics of two types of iso-integral maps: one using tangential (B xy ) components, and one using the normal component (B z ). Each vector component was measured by two types of superconducting quantum interference device (SQUID) system to determine the tangential and normal components. The tangential component of the magnetic field appeared to be equivalent to the current image in the myocardium projected on the observing plane, and we were able to obtain a projected total current image by integration of the tangential components during the depolarization and repolarization processes. And we found that the iso-integral maps of normal hearts showed similar pattern in both processes; however, those of ischemic hearts showed different patterns.

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Authors and Affiliations

  1. Central Research Laboratory, Hitachi Ltd., 1-280 Higashikoigakubo, Kokubunji, Tokyo, 185, Japan

    Keiji Tsukada, Tsuyoshi Miyashita & Akihiko Kandori

  2. Institute of Clinical Medicine, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, 305, Japan

    Toshio Mitsui, Yasushi Terada, Masato Sato, Junko Shiono, Hitoshi Horigome, Satsuki Yamada & Iwao Yamaguchi

Authors
  1. Keiji Tsukada
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  2. Tsuyoshi Miyashita
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  3. Akihiko Kandori
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  4. Toshio Mitsui
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  5. Yasushi Terada
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  6. Masato Sato
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  7. Junko Shiono
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  8. Hitoshi Horigome
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  9. Satsuki Yamada
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  10. Iwao Yamaguchi
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Tsukada, K., Miyashita, T., Kandori, A. et al. An iso-integral mapping technique using magnetocardiogram, and its possible use for diagnosis of ischemic heart disease. Int J Cardiovasc Imaging 16, 55–66 (2000). https://doi.org/10.1023/A:1006376326755

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  • DOI: https://doi.org/10.1023/A:1006376326755

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