Magnetic field mapping and biaxial vector operation for biomagnetic applications using high-sensitivity optically pumped atomic magnetometers

Shuji Taue, Yasuyuki Sugihara, Tetsuo Kobayashi, Kiyoshi Ishikawa, Keigo Kamada

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

Optically pumped alkali-metal atomic magnetometers are expected to be used not only for biomagnetic field measurements but also for magnetic resonance imaging because of their potential ultrahigh sensitivity. Here, we studied magnetic field mapping and biaxial vector operation using atomic magnetometers. A potassium atomic magnetometer was used in these measurements. First, we obtained sensor output signals by solving the Bloch equation. Next, we measured magnetic field distributions generated by a current dipole electrode that was placed in a spherical phantom, which simulated a group of simultaneously activated neurons in the human brain.We obtained vector contour maps of the magnetic field distributions from the dipoles oriented parallel and orthogonal to the pump laser beam and have found good agreement with theoretical magnetic field distributions. These results demonstrate practical applications of magnetic field mapping and biaxial vector operation using optically pumped atomic magnetometers.

Original languageEnglish
JournalJapanese journal of applied physics
Volume50
Issue number11 PART 1
DOIs
Publication statusPublished - Nov 1 2011

ASJC Scopus subject areas

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

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