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BioelectromagnetismPrinciples and Applications of Bioelectric and Biomagnetic Fields$
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Jaakko Malmivuo and Robert Plonsey

Print publication date: 1995

Print ISBN-13: 9780195058239

Published to Oxford Scholarship Online: March 2012

DOI: 10.1093/acprof:oso/9780195058239.001.0001

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PRINTED FROM OXFORD SCHOLARSHIP ONLINE (oxford.universitypressscholarship.com). (c) Copyright Oxford University Press, 2021. All Rights Reserved. An individual user may print out a PDF of a single chapter of a monograph in OSO for personal use. date: 22 October 2021

Theory of Biomagnetic Measurements

Theory of Biomagnetic Measurements

(p.227) Chapter 12 Theory of Biomagnetic Measurements

Jaakko Malmivuo

Oxford University Press

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

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