Magnetocardiography with sensors based on giant magnetoresistance

M. Pannetier-Lecoeur; L. Parkkonen; N. Sergeeva-Chollet; H. Polovy; C. Fermon; C. Fowley

doi:10.1063/1.3575591

Magnetocardiography with sensors based on giant magnetoresistance

M. Pannetier-Lecoeur^*, L. Parkkonen, N. Sergeeva-Chollet, H. Polovy, C. Fermon, C. Fowley

^*Corresponding author for this work

Not published at Aalto University

Research output: Contribution to journal › Article › Scientific › peer-review

76 Citations (Scopus)

Abstract

Biomagnetic signals, mostly due to the electrical activity in the body, are very weak and they can only be detected by the most sensitive magnetometers, such as Superconducting Quantum Interference Devices (SQUIDs). We report here biomagnetic recordings with hybrid sensors based on Giant MagnetoResistance (GMR). We recorded magnetic signatures of the electric activity of the human heart (magnetocardiography) in healthy volunteers. The P-wave and QRS complex, known from the corresponding electric recordings, are clearly visible in the recordings after an averaging time of about 1 min. Multiple recordings at different locations over the chest yielded a dipolar magnetic field map and allowed localizing the underlying current sources. The sensitivity of the GMR-based sensors is now approaching that of SQUIDs and paves way for spin electronics devices for functional imaging of the body.

Original language	English
Article number	153705
Journal	Applied Physics Letters
Volume	98
Issue number	15
DOIs	https://doi.org/10.1063/1.3575591
Publication status	Published - 11 Apr 2011
MoE publication type	A1 Journal article-refereed

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AU - Sergeeva-Chollet, N.

AU - Polovy, H.

AU - Fermon, C.

AU - Fowley, C.

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Magnetocardiography with sensors based on giant magnetoresistance

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