Method and device for the determination of murmur frequency band
First Claim
Patent Images
1. A method for a determination of frequency band characteristic of a heart disease comprising the steps of:
- using an electronic stethoscope, collecting and/or recording a first set of phonocardiograms from a first set of reference healthy patients, and a second set of phonocardiograms from a second set of patients suffering of said heart disease;
defining a frequency sampling rate and a maximum cutoff frequency, producing a finite set of sampled frequencies;
calculating spectral energies at all sampled frequencies, said spectral energies being calculated on the entire phonocardiogram;
calculating spectral energies of all possible frequency bands by summing spectral energies at sample frequencies belonging to said frequency bands;
comparing said spectral energies of all possible frequency bands; and
determining a frequency band giving rise to a maximal distinction between spectral energies of the said phonocardiograms from the first and the second set of phonocardiograms.
1 Assignment
0 Petitions
Accused Products
Abstract
The present invention is related to a method for the determination of frequency band characteristics of a heart disease. A first set of phonocardiograms are recorded from a first set of reference healthy patients, and a second set of phonocardiograms from a second set of patients suffering of a heart disease. Spectral energies of all possible frequency bands are then calculated. These spectral energies are then compared in order to determine an optimized frequency band that gives rise to the maximal distinction between spectral energies of the phonocardiograms from first and second set of phonocardiograms.
6 Citations
14 Claims
-
1. A method for a determination of frequency band characteristic of a heart disease comprising the steps of:
-
using an electronic stethoscope, collecting and/or recording a first set of phonocardiograms from a first set of reference healthy patients, and a second set of phonocardiograms from a second set of patients suffering of said heart disease; defining a frequency sampling rate and a maximum cutoff frequency, producing a finite set of sampled frequencies; calculating spectral energies at all sampled frequencies, said spectral energies being calculated on the entire phonocardiogram; calculating spectral energies of all possible frequency bands by summing spectral energies at sample frequencies belonging to said frequency bands; comparing said spectral energies of all possible frequency bands; and determining a frequency band giving rise to a maximal distinction between spectral energies of the said phonocardiograms from the first and the second set of phonocardiograms. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
-
Specification