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

International journal of cardiac imaging Pub Date : 2000-02-01 DOI:10.1023/a:1006376326755

K Tsukada, T Miyashita, A Kandori, T Mitsui, Y Terada, M Sato, J Shiono, H Horigome, S Yamada, I Yamaguchi

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引用次数: 56

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 (Bxy) components, and one using the normal component (Bz). 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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利用心磁图的等积分制图技术及其在缺血性心脏病诊断中的可能应用。

我们已经开发了一种等积分映射技术，该技术使用磁心图(MCG)数据来获得心脏在躯干上投影的总电流图像。我们还研究了等积分映射在缺血性心脏病诊断中的适用性。我们模拟和测量了两种类型的等积分映射的特征:一种使用切向分量(Bxy)，一种使用法向分量(Bz)。利用两种超导量子干涉装置(SQUID)系统测量每个矢量分量，确定切向分量和法向分量。磁场的切向分量似乎相当于在观察平面上投射到心肌中的电流图像，我们可以在去极化和复极化过程中通过对切向分量的积分得到投影的总电流图像。我们发现正常心脏的等积分图在这两个过程中显示出相似的模式;而缺血心脏的心肌组织则表现出不同的模式。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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International journal of cardiac imaging

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