Measurement of Triaxial Magnetocardiography Using High Sensitivity Tunnel Magnetoresistance Sensor
Measurement of Triaxial Magnetocardiography Using High Sensitivity Tunnel Magnetoresistance Sensor
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DOI：
10.1109/jsen.2019.2927086
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发表时间：
2019-11-01
影响因子：
4.3
通讯作者：
Ye, Chaofeng
中科院分区：
文献类型：
--
作者：
Wang, Meiling;Wang, Yang;Ye, Chaofeng
采用高灵敏度隧道磁阻传感器测量心磁信号的三轴分量。根据测量结果，可以清楚地观察到与心动周期相关的MCG的R波和QRS波群，而不需要进行平均。T波处于噪声水平，较弱的P波淹没在噪声中。这是一个很大的进步相比，以前的MCG测量与TMR传感器，其中需要平均可靠地检测R波。TMR传感器在x方向上观察到的R峰的幅度为200 pT，这与超导量子干涉器件（SQUID）的测量一致，考虑到从观察点到磁场源的距离的影响。y和z分量R峰约为550 pT。由于TMR传感器可以在室温下测量MCG，因此它可能是低温冷却超导设备的一种有前途的替代方案，以使廉价的MCG仪器用于广泛的临床应用。
Three-axis components of magnetocardiography (MCG) signals are measured with a high sensitivity tunnel magnetoresistance (TMR) sensor in this paper. From the measurement result, the R-wave and QRS-complex of MCG associated with the cardiac cycle are clearly observable without need of averaging. The T-wave is at the noise level and the weaker P-wave is drowned in noise. It is a great progress comparing with the previous MCG measurement with TMR sensor, where averaging was required to reliably detect R-wave. The amplitude of R-peak observed by the TMR sensor in the x-direction is 200 pT, which is consistent with the measurement of superconducting quantum interference device (SQUID) considering the effect of distance from the observation point to the magnetic field source. The y and z components R-peak are about 550 pT. As the TMR sensor can measure MCG at room temperature, potentially, it is a promising alternative to cryogenically cooled superconducting devices to make inexpensive MCG instrumentation for extensive clinical applications.