Chapter

Theory of Biomagnetic Measurements

Jaakko Malmivuo

in Bioelectromagnetism

Published in print October 1995 | ISBN: 9780195058239
Published online March 2012 | e-ISBN: 9780199847839 | DOI: http://dx.doi.org/10.1093/acprof:oso/9780195058239.003.0012
Theory of Biomagnetic Measurements

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Biomagnetic fields have very low amplitude compared to ambient noise fields and to the sensitivity of the detectors. This chapter graphically provides a summary of these fields. It indicates that it is possible to detect the MCG with induction coil magnetometers, albeit with a reasonably poor signal-to-noise ratio. However, even the most sensitive induction coil magnetometer built for biomagnetic purposes is not sensitive enough to detect the MEG for clinical use. Therefore, the Superconducting Quantum Interference Device (SQUID) is the only instrument that is sensitive enough for high-quality biomagnetic measurements.

Keywords: biomagnetic measurements; biomagnetic fields; induction coil magnetometers; SQUID; signal-to-noise ratio

Chapter.  10503 words.  Illustrated.

Subjects: Neuroscience

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