| abstract |
Method and system for ultrasonic characterization of a medium nMethod for ultrasonic characterization of a medium, comprising a step of generating a series nof incident ultrasonic waves, a step of generating an experimental reflection matrix Ri(t) ndefined between the emission basis (i) as input and a reception basis (u) as output, a step of ndetermining a focused reflection matrix RFoc(ri., rot, 6t) of the medium between an input nvirtual transducer (TVin) calculated based on a focusing as input to the experimental reflection nmatrix and an output virtual transducer (TVout) calculated based on a focusing as output from nthe experimental reflection matrix, the responses of the output virtual transducer (TVout) being nobtained at a time instant that is shifted by an additional delay 6t relative to a time instant of nthe responses of the input virtual transducer (TVin). nFigure for abstract: FIGURE 4n4/14 n-TnITT nITW IT |