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  • Avoiding non-linearity of optically pumped magnetometer MEG within an actively shielded two-layer mu-metal room [Elektronski vir]
    Sander, Tilmann ; Marhl, Urban, 1993- ; Jazbinšek, Vojko
    Some optically pumped magnetometer (OPM) sensors available for biomagnetic investigations have a linear range limited to ▫$\pm 1$▫nT due to the specific properties of their open loop operation. In a ... two-layer magnetically shielded room of type Ak3b/Vacoshield Advanced with an external active compensation we studied how much sensor movement is allowed until amplitudes exceed the linearity range. Intentional movements were performed by a subject wearing an OPM-MEG sensor array. It was found that movements of 8 cm did yield non-linear amplitudes, but a reduction of the movement in half already preserves linearity. Despite movements,the heartbeat was found to generate a periodic signal, although the generating mechanism could not be identified so far.
    Vir: Proceedings of the 55th Annual Meeting of the German Society of Biomedical Engineering (5 - 7 October 2021, Hannover) [Elektronski vir] (Str. 543-546)
    Vrsta gradiva - prispevek na konferenci ; neleposlovje za odrasle
    Leto - 2021
    Jezik - angleški
    COBISS.SI-ID - 94536195

    Povezava(-e):

    https://www.degruyter.com/document/doi/10.1515/cdbme-2021-2138/html
    DOI

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