Construction of tangential vectors from normal cardiac magnetic field components
Construction of tangential vectors from normal cardiac magnetic field components
复制标题
从正常心脏磁场分量构建切向矢量
DOI：
10.1109/iembs.1998.745961
复制
发表时间：
1998
期刊：
影响因子：
--
通讯作者：
T. Mitsui
中科院分区：
文献类型：
--
作者：
T. Miyashita;A. Kandori;K. Tsukada;M. Sato;Y. Terada;H. Horigome;T. Mitsui
提出了一种切向矢量构造方法，与实际分量的测量相比，该方法减少了获得切向心脏磁场分量所需的SQUID传感器的数量。从测量的法向分量计算的切向矢量具有与实际矢量的分布定性相似的空间分布。在可行性研究中，我们通过简单的模拟和测量数据比较了这些计算和实际切向分量。在仿真中，在半空间中的水平分层导体被用来模拟躯干，等效电流偶极子被用来模拟心脏的电生理源。我们使用两种不同的SQUID系统来测量心脏磁场的法向分量（Bz）和切向分量（Bx和By）。在胸部175/spl times/175 mm区域的64个点处使用8/spl times/8阵列测量每个分量。我们的模拟和测量结果表明，计算和实际切向分量之间的定性相似。因此，从正常分量的常规测量中，我们可以提取关于心脏的等效信息，其使得能够进行三维向量心磁图测量。
A tangential vector construction method is proposed that reduces the number of SQUID sensors needed to obtain tangential cardiac magnetic field components compared to measurement of the actual components. Tangential vectors calculated from measured normal components have a spatial distribution that is qualitatively similar to the distribution of the actual vectors. In a feasibility study, we compared these calculated and actual tangential components through a simple simulation and measured data. In the simulation, a horizontally layered conductor in the half space was used to model the torso, and equivalent current dipoles were used to model the electrophysiological sources of the heart. We used two different SQUID systems to measure the normal component (Bz) of an cardiac magnetic field, and the tangential components (Bx and By). Each component was measured at 64 points with an 8/spl times/8 array from a 175/spl times/175 mm area of the chest. Both our simulated and measured results showed a qualitative similarity between the calculated and actual tangential components. Thus, from a conventional measurement of the normal component, we can extract equivalent information about the heart that enables three-dimensional vector magnetocardiogram measurement.
影响因子：
3.5
作者：
SARVAS, J
通讯作者：
SARVAS, J