Biomagnetic measurement system on mice - Evaluation of system performance by MCG and application to MEG

T. Nakamura, K. Shirai, Y. Ono, N. Kasai, A. Odawara, Atsushi Ishiyama

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    We developed a biomagnetic measurement system on mice. Our initial model of the system has the magnetic field sensitivity of 1.3 pT/Hz1/2 in the white-noise region (10 Hz-10 kHz). And using the system, we succeeded to obtain magnetically the heart activity on mice. However, in its application to measure the brain activity on mice, it was necessary to improve the magnetic field sensitivity of the system. Therefore, we changed the material of the window cap, which holds a sapphire glass window on the dewar tail, to ceramic. The system noise was decreased and the magnetic field sensitivity of the system was improved to 0.75 pT/Hz1/2 in the white-noise region. For an initial measurement of the brain activity, we also developed a whisker stimulation system using a piezoelectric element to evoke somatosensory responses.

    Original languageEnglish
    Article number297
    Pages (from-to)1219-1222
    Number of pages4
    JournalJournal of Physics: Conference Series
    Issue number1
    Publication statusPublished - 2006 Jun 1


    ASJC Scopus subject areas

    • Physics and Astronomy(all)

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