Advancement and limitation of SQUID-based MEG

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The application of MEG has been quickly expanded into both basic and clinical research fields. However, we now face several limits of SQUID-based systems. Firstly, the helmet-shaped sensor placement is fixed despite different size and shapes of the subject's heads. Moreover, for the wall thickness of the liquid helium container, sensors are located far from the scalp surface. Secondly, speedup of the signal processing is necessary for the demand of high signal frequency, i.e. 200-2,000 Hz, for multi-channel recordings, i.e., 300-1,000. Thirdly, the source estimation algorithm cannot catch up with the development of multichannel MEG systems. In this report, we show the recent development of the MEG application while we discussing an ideal MEG system with non-SQUID sensors in the near future.

Original languageEnglish
Pages (from-to)OS-26
JournalTransactions of Japanese Society for Medical and Biological Engineering
Publication statusPublished - 2014 Aug 17

ASJC Scopus subject areas

  • Biomedical Engineering


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