Title | ||
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Magnetocardiography Measurements by Microfabricated Atomic Magnetometer With a 3-D Spherical Alkali Vapor Cell |
Abstract | ||
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In the field of biomagnetic applications, including magnetocardiography (MCG), portable magnetic measurement is promising. This article demonstrates simulated MCG measurements using a microfabricated spin-exchange relaxation-free (SERF) atomic magnetometer with a 3-D chip-scale spherical rubidium vapor cell. The vapor cell temperature is optimized from 100 degrees C to 160 degrees C, and the magnetometer response is recorded under different magnetic flux densities in the range of 10-122 pT. Then simulated MCG measurements are implemented in a magnetic shield. The original MCG signals are denoised by a two-step processing to obtain the featured waveforms of the MCG signals. The experimental result shows that the microfabricated magnetometer in the magnetic shield exhibits a sensitivity of 125 fT/Hz(1/2) at 15 Hz, and the signal-to-noise ratio is increased to 48.3 after denoising. The magnetometer enabled by a 3-D chip-scale spherical rubidium vapor cell has the ability to obtain morphologically clear cardiomagnetic signals with distinct P-, QRS-, and T-waves. With further optimizations, the microfabricated atomic magnetometers based on chip-scale 3-D alkali vapor cells have the potential to enable magnetoencephalography (MEG) measurements and nuclear magnetic resonance imaging (NMRI). |
Year | DOI | Venue |
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2021 | 10.1109/TIM.2021.3120375 | IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT |
Keywords | DocType | Volume |
Chip-scale, magnetocardiography (MCG), microfabricated atomic magnetometer, spherical alkali vapor cell, spin-exchange relaxation-free (SERF) | Journal | 70 |
ISSN | Citations | PageRank |
0018-9456 | 0 | 0.34 |
References | Authors | |
0 | 5 |
Name | Order | Citations | PageRank |
---|---|---|---|
Jin Zhang | 1 | 0 | 1.69 |
Kangni Liu | 2 | 0 | 0.34 |
Jianfeng Zhang | 3 | 0 | 0.34 |
Ziji Wang | 4 | 0 | 0.34 |
Jintang Shang | 5 | 0 | 0.68 |