US 7,952,425 B2Granted

Adaptive filtering system for patient signal monitoring

AssigneeSiemens Medical Solutions USA, Inc.

InventorsHongxuan Zhang, Jeffrey Rebacz

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Abstract

A system provides a high quality, and intuitive multi-band filter that adapts when noise frequencies or noise amplitudes change. A system for adaptively filtering patient monitoring signals, comprises a filter controller for adaptively determining the number of, and individual filter bandwidth of, multiple adaptive signal filters to be used in filtering multiple bandwidths within an encompassing signal filtering bandwidth. The filter controller does this in response to, (a) noise data indicating noise source frequencies and (b) configuration data determining medical signal or noise source characteristics, to provide programming data for programming a plurality of adaptive signal filters. The system includes multiple adaptive signal filters individually having a filtering bandwidth and filtering characteristic programmable in response to received programming data. A noise detector automatically identifies a noise component in a received patient monitoring signal and generates the noise data.

Claims15

Dependent claims

A system for adaptively filtering patient monitoring signals, comprising:

a plurality of adaptive signal filters individually having a filtering bandwidth and filtering characteristics including at least one of, (a) cut-off frequency, (b) center frequency and (c) bandwidth programmable in response to received programming data, said plurality of adaptive signal filters being used to filter a received patient monitoring signal to provide a filtered signal;
a noise detector for automatically identifying noise components in said received patient monitoring signal and generating noise data indicating different noise source frequencies are present in said received patient monitoring signal;
and
a filter controller, electrically coupled to said noise detector and said plurality of adaptive signal filters for providing said programming data adaptively determining said filtering characteristics and determining the number of, and individual filter bandwidth of, said plurality of adaptive signal filters to be used in filtering a plurality of bandwidths within an encompassing signal filtering bandwidth of said received patient monitoring signal to filter noise at said noise source frequencies, in response to,
(a) said noise data indicating said noise source frequencies and
(b) configuration data determining patient monitoring signal or noise source characteristics.

3 more elements

A method of adaptive medical signal filtering, comprising the activities of:

adaptively filtering a received patient monitoring signal using a plurality of adaptive filters individually having a filtering bandwidth and filtering characteristics including at least one of, (a) cut-off frequency, (b) center frequency and (c) bandwidth programmable in response to received programming data for filtering one or more received patient monitoring signals over a predetermined frequency bandwidth to provide at least one filtered signal;
automatically identifying noise components in a received patient monitoring signal and generating noise data indicating different noise source frequencies are present in said received patient monitoring signal;
and
providing said programming data adaptively determining said filtering characteristics and determining the number of, and individual filter bandwidth of, said plurality of adaptive signal filters to be used in filtering a plurality of bandwidths within an encompassing signal filtering bandwidth of said received patient monitoring signal to filter noise at said noise source frequencies, in response to,
(a) said noise data indicating said noise source frequencies and
(b) configuration data determining patient monitoring signal or noise source characteristics.

3 more elements

Dependencies are inferred from the claim text.