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- W2000325441 abstract "FDORT (focused DORT) is an alternative of the DORT method using focused transmits instead of single-element transmits. In the case of well-resolved point scatterers, the FDORT eigenvectors may be understood as invariants of the time reversal operator. However, if the medium is a collection of many subresolution scatterers (speckle), a different interpretation is more helpful. It is shown that, in speckle, the FDORT matrix may be interpreted statistically as a spatial correlation matrix, whose coefficients are the correlation between signals received by pairs of elements. The matrix is fully described by the Van Cittert Zernike theorem. The first eigenvector still has focusing properties, and the eigenvalues can be related to the so-called focusing criterion. Applications to aberration estimation in medical ultrasound are presented." @default.
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- W2000325441 date "2006-11-01" @default.
- W2000325441 modified "2023-10-17" @default.
- W2000325441 title "Properties of focused time reversal operator in random media" @default.
- W2000325441 doi "https://doi.org/10.1121/1.4787762" @default.
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