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Magnetocardiography with a modular spin-exchange relaxation-free atomic magnetometer array.

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Bibliographic Details
Title: Magnetocardiography with a modular spin-exchange relaxation-free atomic magnetometer array.
Authors: Wyllie, R.1 wyllie@wisc.edu, Kauer, M.1, Smetana, G. S.1, Wakai, R. T.2, Walker, T. G.1
Source: Physics in Medicine & Biology. May2012, Vol. 57 Issue 9, p2619-2632. 14p.
Subjects: Magnetocardiography, Nuclear spin, Magnetometers, Biomagnetism, Modular design, Magnetic shielding, Electromagnetic noise
Abstract: 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 orientation of each magnetometer. Using this array in a magnetically shielded room, we acquire adult magnetocadiograms. Thesemeasurements were taken with a 6-11 fT Hz-1/2 single-channel baseline sensitivity that is consistent with the independently measured noise level of the magnetically shielded room. [ABSTRACT FROM AUTHOR]
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Database: Engineering Source
Description
Abstract: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 orientation of each magnetometer. Using this array in a magnetically shielded room, we acquire adult magnetocadiograms. Thesemeasurements were taken with a 6-11 fT Hz-1/2 single-channel baseline sensitivity that is consistent with the independently measured noise level of the magnetically shielded room. [ABSTRACT FROM AUTHOR]
ISSN:00319155
DOI:10.1088/0031-9155/57/9/2619