Method for processing signals coming from an acquisition by ultrasound probing, corresponding computer program and ultrasound probing device

2:

• The method for processing ultrasound signals according to claim 1, wherein:
• the elimination of a portion of the singular values and associated singular vectors is carried out according to a predetermined criterion of distinction between singular values linked to defects and singular values linked to noise, and
• the reconstruction of the denoised matrix [MRU(t)] of time signals comprises a reconstruction of a denoised matrix [FTMRU(f)] of frequency signals on the basis of the singular values and singular vectors not eliminated, then an inverse transform of this denoised matrix [FTMRU(f)] of frequency values into the denoised matrix [MRU(t)] of time signals.

3:

• The method for processing ultrasound signals (S) according to claim 2, wherein the transform and the inverse transform are discrete Fourier transforms.

4:

• The method for processing ultrasound signals (S) according to claim 2, wherein the elimination of a portion of the singular values and associated singular vectors is carried out by:
• comparison of a decrease in amplitudes of the singular values to a theoretical curve of decrease in singular values resulting from a theoretical noise matrix, the components of which are independent Gaussian random variables, then
• removal of the singular values belonging, give or take a common proportionality coefficient, to the theoretical decrease curve.

6:

• The method for processing ultrasound signals (S) according to claim 1, further comprising a reconstruction of an imaged zone by calculation, in each point of a plurality of predetermined points of this imaged zone, of a value resulting from a coherent sum of instantaneous values respectively taken by at least a portion of the N×M time signals of the matrix [MRU(t)] at times of flight respectively corresponding to a passage through the point in question according to a predetermined propagation mode.

7:

• The method for processing ultrasound signals (S) according to claim 6, wherein the calculation is carried out on a portion of the N×M time signals of the matrix [MRU(t)] in an angular sector (m1, m2) restricted in all of the successive emissions.

8:

• The method for processing ultrasound signals (S) according to claim 7, wherein the restricted angular sector (m1, m2) is selected on the basis of a comparison, for at least one of the singular values not eliminated, of an experimental phase value of the singular vector that is associated with it in emission to a theoretical phase value in the presence of said at least one defect linked to this singular vector, in such a way that the plane waves that are excluded therefrom do not interact with at least one defect linked to the singular values and singular vectors not eliminated.

9:

• A computer program that can be downloaded from a communication network and/or is recorded on a medium readable by computer and/or can be executed by a processor, characterised in that it comprises instructions for executing the steps of a method for processing ultrasound signals (S) according to claim 1, when said program is executed on a computer.