Method and device for local spectral analysis of an ultrasonic signal
US7509861B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Oct 5, 2004 |
| Grant date | Mar 31, 2009 |
| Priority date | — |
| Expiry date | Nov 25, 2025 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S15/8977
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The method decomposes the radio frequency signal into sub-bands by filtering, for example with a time-frequency transform. From the coefficients acquired through decomposition a matrix of spectral coefficients is obtained, from which local estimators are obtained, constituted in particular by the coefficients of the interpolating polynomials. The statistical distribution of the local estimators is evaluated in windows overlaid on the ultrasound frame. The conformation of the distribution histograms of the spectral coefficients provides a parameter which, combined with the local estimators, provides weighted local estimators, which contain spectral information useful in the identification of specific structures in the organ subjected to ultrasound analysis.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.