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

Keiji Tsukada, Tsuyoshi Miyashita, Akihiko Kandori, Toshio Mitsui, Yasushi Terada, Masato Sato, Junko Shiono, Hitoshi Horigome, Satsuki Yamada, Iwao Yamaguchi

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56 Scopus citations

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.

Original languageEnglish (US)
Pages (from-to)55-66
Number of pages12
JournalInternational Journal of Cardiac Imaging
Volume16
Issue number1
DOIs
StatePublished - May 4 2000

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Keywords

  • Ischemic heart disease
  • Iso-integral mapping
  • Multi-channel SQUID system
  • Tangential MCG
  • Ventricular depolarization
  • Ventricular repolarization

ASJC Scopus subject areas

  • Radiological and Ultrasound Technology
  • Radiology Nuclear Medicine and imaging
  • Cardiology and Cardiovascular Medicine

Cite this

Tsukada, K., Miyashita, T., Kandori, A., Mitsui, T., Terada, Y., Sato, M., Shiono, J., Horigome, H., Yamada, S., & Yamaguchi, I. (2000). An iso-integral mapping technique using magnetocardiogram, and its possible use for diagnosis of ischemic heart disease. International Journal of Cardiac Imaging, 16(1), 55-66. https://doi.org/10.1023/A:1006376326755