Reconstruction of fetal vector electrocardiogram from maternal abdominal signals under fetus body rotations
Reconstruction of fetal vector electrocardiogram from maternal abdominal signals under fetus body rotations
复制标题
胎儿身体旋转下母体腹部信号重建胎儿矢量心电图
DOI：
10.1109/embc.2013.6611253
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发表时间：
2013
期刊：
影响因子：
--
通讯作者：
M. Nakao
中科院分区：
文献类型：
--
作者：
Y. Nabeshima;Y. Kimura;T. Ito;K. Ohwada;A. Karashima;N. Katayama;M. Nakao
胎儿心电图（fECG）及其矢量形式（fVECG）可以提供有关胎儿生理状况的重要临床信息。迄今为止，已经提出了各种基于独立成分分析（ICA）的从母体腹部信号中提取 fECG 的方法。由于在噪声和非平稳情况下很难实现 P、Q、R、S 和 T 等分量波的完全提取，因此 fVECG 也很难重建，需要对胎儿心脏矢量进行不同的投影。为了重建 fVECG，我们提出了一种合成心脏矢量不同投影的新方法，充分利用胎儿运动。该方法包括 ICA、胎儿旋转角度的估计以及心脏矢量投影的合成。通过对合成数据和实际数据的应用，我们的方法可以精确估计胎儿的旋转角度并成功重建 fVECG。
Fetal electrocardiogram (fECG) and its vector form (fVECG) could provide significant clinical information concerning physiological conditions of a fetus. So far various independent component analysis (ICA)-based methods for extracting fECG from maternal abdominal signals have been proposed. Because full extraction of component waves such as P, Q, R, S, and T, is difficult to be realized under noisy and nonstationary situations, the fVECG is further hard to be reconstructed, where different projections of the fetal heart vector are required. In order to reconstruct fVECG, we proposed a novel method for synthesizing different projections of the heart vector, making good use of the fetus movement. This method consists of ICA, estimation of rotation angles of fetus, and synthesis of projections of the heart vector. Through applications to the synthetic and actual data, our method is shown to precisely estimate rotation angle of the fetus and to successfully reconstruct the fVECG.