Automatic adjustment of time-variant thresholds when filtering signals in MR tomography

  • Authors:

  • Eva Gescheidtova;Radek Kubasek;Zdenek Smekal;Karel Bartusek

  • Affiliations:

  • Faculty of Electrical Engineering and Communication, Brno University of Technology, Brno, Czech Republic;Faculty of Electrical Engineering and Communication, Brno University of Technology, Brno, Czech Republic;Brno, Czech Republic;Institute of Scientific Instruments, Academy of Sciences of the Czech Republic

  • Venue:
  • ICN'05 Proceedings of the 4th international conference on Networking - Volume Part II
  • Year:
  • 2005

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Abstract

Removing noise from an FID signal (a signal detected in MR measurement) is of fundamental significance in the analysis of results of NMR spectroscopy and tomography. Optimum solution can be seen in removing noise by means of a digital filter bank that uses half-band mirror frequency filters of the type of low-pass and high-pass filters. A filtering method using digital filters and the approach of automatic threshold adjustment is described in the paper.