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Ultrasonic wave propagation through aberrating layers: experimental verification of the conjugate gradient Rayleigh method

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3 Author(s)
Ledoux, L.A.F. ; Biophys. Lab., St. Radboud Univ. Hospital, Nijmegen, Netherlands ; Berkhoff, A.P. ; Thijssen, J.M.

The Conjugate Gradient Rayleigh method for the calculation of acoustic reflection and transmission at a rough interface between two media was experimentally verified. The method is based on a continuous version of the conjugate gradient technique and plane-wave expansions. We measured the beam profiles of a nonfocused linear array transducer distorted by propagation through an aberrating interface. The directivity of the hydrophone was compensated for by means of spatial deconvolution. Sinusoidal, cylindrical aberrators were made of a water-based gelatine material. The measurements were compared with 2- and 3-D simulations. The measured and simulated beam profiles are in good agreement, as shown by the root-mean-square difference.

Published in:

Ultrasonics, Ferroelectrics, and Frequency Control, IEEE Transactions on  (Volume:43 ,  Issue: 1 )

Date of Publication:

Jan. 1996

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