ULTRASOUND IMAGING APPARATUS AND METHOD WITH FILTERING OF ARTEFACTS DUE TO INTERFERENCES BETWEEN RECONSTRUCTION MODES

摘要

The invention relates to the field of ultrasonic imaging and is particularly useful in the non-destructive monitoring of parts. The method according to the invention includes: a step (712) of acquiring a set of M x N ultrasonic signals S ij -(t), M being the number of transmitters i, N being the number of receivers and t being a variable representing time, a step (73) of determining the theoretical times Tij(P) necessary for the ultrasonic signal S ij -(t) to travel the various paths from one of the transmitters i to one of the receivers; while passing through the point P in question, a step (91) of determining the angles &thetas; ij(P) formed between a portion of each path joining point P, and a portion of said path leaving point P, and for each point P, and a step (92) of determining a weighted sum / (P) of the amplitudes extracted from the signals S ij -(t) at the moments Tij(P) corresponding to the point P in question, the weighting being a function of the angles &thetas; ij(P).