Magnetocardiography with sensors based on giant magnetoresistance

M. Pannetier-Lecoeur 1, * L. Parkkonen 1 N. Sergeeva-Chollet 1 H. Polovy 1 C. Fermon 1 C. Fowley 2
* Auteur correspondant
1 LNO - Laboratoire Nano-Magnétisme et Oxydes
SPEC - UMR3680 - Service de physique de l'état condensé, IRAMIS - Institut Rayonnement Matière de Saclay
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.
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Applied Physics Letters, American Institute of Physics, 2011, 98, pp.153705. 〈10.1063/1.3575591〉
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Soumis le : lundi 8 octobre 2018 - 14:45:22
Dernière modification le : mardi 9 octobre 2018 - 01:15:52

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M. Pannetier-Lecoeur, L. Parkkonen, N. Sergeeva-Chollet, H. Polovy, C. Fermon, et al.. Magnetocardiography with sensors based on giant magnetoresistance. Applied Physics Letters, American Institute of Physics, 2011, 98, pp.153705. 〈10.1063/1.3575591〉. 〈cea-01890264〉

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