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Method and system to enhance medical signals for real-time analysis and high-resolution display

Patent 5490516 Issued on February 13, 1996. Estimated Expiration Date: Icon_subject May 6, 2013. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.

Patent References

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Inventor

Application

No. 058571 filed on 05/06/1993

US Classes:

600/508, Heart128/901SUPPRESSION OF NOISE IN ELECTRIC SIGNAL

Examiners

Primary: Kamm, William E.
Assistant: Getzow, Scott M.

Attorney, Agent or Firm

International Class

A61B 005/040.2

Abstract

A medical processing and display system that may be used with a medical monitoring device. This system enhances the medical data it receives. Once received, the medical data is reformatted into a two-dimensional matrix, X. A history database and other information are concatenated with the two-dimensional matrix. The concatenated matrix is decomposed using singular value decomposition ("SVD") to obtain corresponding left and right singular vectors, L and R, respectively, and singular values D. Selected singular vectors are transformed to their autocorrelation matrix form, which are concatenated, then decomposed using SVD to their corresponding singular vectors P, Pt, and singular values D. Certain of the singular vectors P are selected to filter out signal components of interest. The singular values D of the autocorrelation matrix are modified and used to adjust the weights of the associated singular vectors P. The weighted singular vectors are then combined and the resulting coefficients are used as a FIR filter to enhance the original singular vectors L and/or Rt to enhance singular values Le, Re. Enhanced medical data containing the features of interest Xe is generated from the enhanced original matrix singular values Le and Re, and modified singular values De, and the results may be displayed to a diagnotician in various formats.

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