Magnetocardiography Using a Magnetoresistive Sensor Array.
Magnetocardiography Using a Magnetoresistive Sensor Array.
复制标题
使用磁阻传感器阵列的心磁图。
DOI：
10.1536/ihj.18-002
复制
发表时间：
2019
影响因子：
1.5
通讯作者：
S. Kawabata
中科院分区：
文献类型：
--
作者：
Y. Shirai;K. Hirao;Tomohiko Shibuya;Shuichi Okawa;Y. Hasegawa;Y. Adachi;K. Sekihara;S. Kawabata
在先前的心磁图研究中，心磁图(MCGs)是使用超导量子干涉装置(SQUID)系统获得的。SQUID是测量低频磁场最灵敏的仪器，但它需要液氦进行冷却，因此运营成本较高。相比之下，磁阻(MR)磁力计通过检测外部磁场引起的电阻变化来发挥作用，而且成本要低得多。这项研究的目的是评估MR传感器阵列用于采集MCG的可行性。我们使用了MR传感器阵列，该阵列是为测量皮特斯拉范围内的磁场而开发的，噪声水平较低(日本东京TDK公司)。将30道磁共振传感器阵列放置在磁屏蔽室中，记录了5名健康受试者胸壁前壁上的心脏磁场，并成功地记录了5名受试者的心磁图。利用平均272±27.5拍的信号可以检测到心电图上P波、QRS波和T波对应的心脏磁场，利用磁共振传感器阵列可以测量心脏磁场。我们的结果将有助于开发低成本的心电记录设备，这将有助于心血管医学中非侵入性诊断的发展。
In previous magnetocardiography studies, magnetocardiograms (MCGs) have been obtained using superconducting quantum interference device (SQUID) systems. SQUID is the most sensitive instrument for measuring low-frequency magnetic fields, but it requires liquid helium for cooling, so operating costs are high. In contrast, magnetoresistive (MR) magnetometers function by detecting the change in resistance, caused by an external magnetic field, and have much lower costs. This study was aimed to evaluate feasibility of the MR sensor array for acquiring MCGs.We used an MR sensor array, which was developed for measuring magnetic fields in the picotesla range, with a reduced noise level (TDK Corporation, Tokyo, Japan). A 30-channel MR sensor array was placed in a magnetically shielded room, and the cardiac magnetic field over the anterior chest walls of five healthy subjects was recorded.For all five subjects, MCGs were successfully recorded using the MR sensor array. The cardiac magnetic field corresponding to P, QRS, and T waves on an electrocardiogram (ECG) was detectable by signals averaging 272 ± 27.5 beats.An MR sensor array can be used to measure cardiac magnetic fields. Our results will contribute to the development of low-cost devices for recording MCGs, which will help develop non-invasive diagnostics in cardiovascular medicine.