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