Whole cortex, 64 channel SQUID biomagnetometer system
| Autor: | D. McKenzie, J. Vrba, G. Haid, Douglas Cheyne, M.B. Burbank, T. Cheung, M. Tillotson, S. Lee, P.R. Kubik, J. McCubbin, K. Betts, P. Spear, J. McKay, B. Taylor, H. Weinberg, A.A. Fife |
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| Rok vydání: | 1993 |
| Předmět: |
Digital electronics
Signal processing Computer science Noise (signal processing) Magnetometer business.industry Acoustics Condensed Matter Physics Biomagnetism Electromagnetic interference Electronic Optical and Magnetic Materials law.invention SQUID law Electrical and Electronic Engineering business Active noise control |
| Zdroj: | IEEE Transactions on Applied Superconductivity. 3:1878-1882 |
| ISSN: | 1558-2515 1051-8223 |
| Popis: | The authors report on the development and testing of a novel, whole cortex, 64-channel superconducting quantum interference device (SQUID) biomagnetometer system operating in an unshielded environment. The essential features of this instrument, including the cryogenics system, the room-temperature digital electronics, and signal processing capabilities, are described. A noise cancellation scheme is incorporated which allows extraction of biomagnetic signals over the surface of the cortex while operating in the presence of large background magnetic interference. A system description and the results of preliminary magneto-encephalographic measurements are presented. Measurements of noise performance and human auditory evoked response in an unshielded industrial environment have largely validated the noise cancellation methods incorporated in the instrument. > |
| Databáze: | OpenAIRE |
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