Surgery – Diagnostic testing – Cardiovascular
Patent
1998-07-21
1999-07-13
Kamm, William E.
Surgery
Diagnostic testing
Cardiovascular
A61B 500
Patent
active
059219378
ABSTRACT:
The invention is directed to a method and associated system for the detection of various physiological features in multichannel sensor data. Truth data organized in the form of a vector sequence is used to generate a multichannel state variable model for data that is known to lack physiological features of interest. Such state variable models are obtained using one or more of a host of system identification algorithms. Upon identification of the model parameters, a multichannel inverse filter is derived from the model parameters. The inverse filter can be used to whiten or decorrelate components of sensor data sequences that are not associated with the physiological features of interest. The unwhitened output of the inverse filter then represents the physiological features of interest that can be extracted from the concomitant white noise. On this basis, a number of such filters can be produced for a variety of undesired physiological feature components of the data that occur separately or in combination. The invention is useful for the extraction of known and unknown features of interest from multichannel physiological sensor data.
REFERENCES:
patent: 5020540 (1991-06-01), Chamoun
patent: 5390679 (1995-02-01), Martin
Davis Dennis W.
Michels James H.
Roman Jaime R.
Evanisko George R.
Kamm William E.
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