Adaptive enhancement of magnetoencephalographic signals via multichannel filtering

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A time-varying spatial/temporal filter for enhancing multichannel magnetoencephalographic (MEG) recordings of evoked responses is described. This filter is based in projections derived from a combination of measured data and a priori models of the expected response. It produces estimates of the evoked fields in single trial measurements. These estimates can reduce the need for signal averaging in some situations. The filter uses the a priori model information to enhance responses where they exist, but avoids creating responses that do not exist. Examples are included of the filter's application to both MEG single trial data containing an auditory evoked field and ... continued below

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Pages: 5

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Lewis, P.S. January 1, 1989.

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Description

A time-varying spatial/temporal filter for enhancing multichannel magnetoencephalographic (MEG) recordings of evoked responses is described. This filter is based in projections derived from a combination of measured data and a priori models of the expected response. It produces estimates of the evoked fields in single trial measurements. These estimates can reduce the need for signal averaging in some situations. The filter uses the a priori model information to enhance responses where they exist, but avoids creating responses that do not exist. Examples are included of the filter's application to both MEG single trial data containing an auditory evoked field and control data with no evoked field. 5 refs., 7 figs.

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Pages: 5

Notes

NTIS, PC A02/MF A01 - OSTI; 1.

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  • International conference on acoustics, speech and signal processing, Glasgow, UK, 23 May 1989

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  • Other: DE89005464
  • Report No.: LA-UR-88-4190
  • Report No.: CONF-890570-1
  • Grant Number: W-7405-ENG-36
  • Office of Scientific & Technical Information Report Number: 6176928
  • Archival Resource Key: ark:/67531/metadc1111030

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Office of Scientific & Technical Information Technical Reports

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  • January 1, 1989

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  • Feb. 22, 2018, 7:45 p.m.

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  • May 11, 2018, 11:16 a.m.

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Lewis, P.S. Adaptive enhancement of magnetoencephalographic signals via multichannel filtering, article, January 1, 1989; New Mexico. (digital.library.unt.edu/ark:/67531/metadc1111030/: accessed August 14, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.