Active shielding in measurements of DC near biomagnetic fields
Engineering in Medicine and Biology Society, 2001. Proceedings of the 23rd Annual International Conference of the IEEE （2001）
摘要
Measurements of DC near biomagnetic fields are disturbed by low frequency noise, that is not reduced sufficiently by most magnetically shielded rooms or gradiometers. An effective SQUID based active shielding system has been developed and installed at the magnetically shielded rooms in the Biomagnetic Center of the University Jena to reduce external low frequency disturbances. A reduction of the magnetic noise of about 23 dB could be achieved at 50 mHz.
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关键词
squid magnetometers,biomagnetism,magnetic field measurement,magnetic shielding,magnetoencephalography,50 mhz,dc near biomagnetic field measurements,active shielding,effective squid based active shielding system,external low frequency disturbances,gradiometers,human stroke patients,low frequency noise,magnetic noise,magnetic source imaging,magnetically shielded rooms,periinfarct depolarizations,spreading depression,electromagnetic shielding,superconducting magnets,electromagnetic interference,low frequency,frequency,magnetic fields,noise reduction
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