Optical magnetometer array for fetal magnetocardiography
نویسندگان
چکیده
منابع مشابه
Optical magnetometer array for fetal magnetocardiography.
We describe an array of spin-exchange-relaxation-free optical magnetometers designed for detection of fetal magnetocardiography (fMCG). The individual magnetometers are configured with a small volume with intense optical pumping, surrounded by a large pump-free region. Spin-polarized atoms that diffuse out of the optical pumping region precess in the ambient magnetic field and are detected by a...
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This paper demonstrates the concept of an optical magnetometer for magnetocardiography. The magnetometer employs a standard Least-Mean-Squares (LMS) algorithm for heart magnetic field measurement within unshielded environment. Experimental results show that the algorithm can extract a weak heart signal from a much-stronger magnetic noise and detect the P, QRS, and T heart features and completel...
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We present a portable four-channel atomic magnetometer array operating in the spin-exchange relaxation-free regime. The magnetometer array has several design features intended to maximize its suitability for biomagnetic measurement, specifically foetal magnetocardiography, such as a compact modular design and fibre-coupled lasers. The modular design allows the independent positioning and orient...
متن کاملFuture topics in fetal magnetocardiography
Since the first fetal magnetocardiogram was demonstrated by Kariniemi in 1974 [1], various groups worldwide have explored potential of investigating fetal cardiac activity using biomagnetic sensing systems and have examined the issues involved (for an overview, see [2]). In the past 25 years, fetal magnetocardiograms (FMCG) have been recorded in healthy fetuses as well as in pregnancies involvi...
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Following the rapid progress in the development of optically pumped magnetometer (OPM) technology for the measurement of magnetic fields in the femtotesla range, a successful assembly of individual sensors into an array of nearly identical sensors is within reach. Here, 25 microfabricated OPMs with footprints of 1 cm(3) were assembled into a conformal array. The individual sensors were inserted...
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ژورنال
عنوان ژورنال: Optics Letters
سال: 2012
ISSN: 0146-9592,1539-4794
DOI: 10.1364/ol.37.002247