Magnetocardiography and magnetoencephalography measurements at room temperature using tunnel magneto-resistance sensors

Kosuke Fujiwara, Mikihiko Oogane, Akitake Kanno, Masahiro Imada, Junichi Jono, Takashi Terauchi, Tetsuo Okuno, Yuuji Aritomi, Masahiro Morikawa, Masaaki Tsuchida, Nobukazu Nakasato, Yasuo Ando

Research output: Contribution to journalArticlepeer-review

24 Citations (Scopus)

Abstract

Magnetocardiography (MCG) and magnetoencephalography (MEG) signals were detected at room temperature using tunnel magneto-resistance (TMR) sensors. TMR sensors developed with low-noise amplifier circuits detected the MCG R wave without averaging, and the QRS complex was clearly observed with averaging at a high signal-to-noise ratio. Spatial mapping of the MCG was also achieved. Averaging of MEG signals triggered by electroencephalography (EEG) clearly observed the phase inversion of the alpha rhythm with a correlation coefficient as high as 0.7 between EEG and MEG.

Original languageEnglish
Article number023001
JournalApplied Physics Express
Volume11
Issue number2
DOIs
Publication statusPublished - 2018 Feb

ASJC Scopus subject areas

  • Engineering(all)
  • Physics and Astronomy(all)

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