DC-SQUID sensor system for multichannel neuromagnetometry
نویسندگان
چکیده
منابع مشابه
Dc - Squid Sensor System for Multichannel Neuromagnetometry
Various DC-SQUID sensor configurations were developed for use in our 19-channel neuromagnetometer. Apart from the standard type, resistively and inductively shunted SQUIDs were made, allowing for a large screening factor p (>l). In this way signal coupling from the pick-up coil to the SQUID is facilitated and capacitive coupling between the input coil and the SQUID washer can be decreased. The ...
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The field of biomagnetism advanced considerably since the first recordings of magnetic fields of the human heart in 1963 and of the human brain in 1968. Since the introduction of whole-cortex magnetoencephalography (MEG) systems in 1992, the number of installed channels has dramatically increased, and the magnetic evaluation of the human brain has been gradually finding its place in clinical wo...
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Multichannel superconducting quantum interference device (SQUID) systems based on double relaxation oscillation SQUIDs (DROS) were developed for measuring magnetocardiography (MCG) and magnetoencephalography (MEG) signals. Since DROS provides large fluxto-voltage transfer coefficients, about 10 times larger than the DC SQUIDs, direct readout of the SQUID output was possible using compact roomte...
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Lo~v noisc prealnplifiers are requircd for the dcrcctio~\ of the magnclic rcson;nicc of s~ii:~ll size samplcs o r a l low tnagnetic fields. According to calculat~ons based on the "ell. ill " modcl. SQUID b;tscd nnlplifiers arc more suitable to NMR experiments on sn~all samplcs lhan sciniconductor amplifiers. We propose an amplification method by frequency transposition using a DC SQUID. Such a ...
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ژورنال
عنوان ژورنال: IEEE Transactions on Magnetics
سال: 1991
ISSN: 0018-9464,1941-0069
DOI: 10.1109/20.133830