A wavefield extrapolation method for simulating B-scan images.
We describe an algorithm which improves the efficiency of simulations of B-scan images involving water path acoustical imaging systems. The method is a hybrid approach in which Rayleigh-Sommerfeld diffraction theory is used to extrapolate the propagated part of the acoustic pressure field back to the transducer while the scattered field produced by the tissue is obtained using a time-domain scattering algorithm. Considerable savings in both CPU time and array storage are achieved by elimination of discrete time updates on the computational grid between the source and the tissue.
Finette
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Department of Biomedical Engineering, Rutgers University, Piscataway, NJ 08855.
D000465:Algorithms; D003198:Computer Simulation; D006801:Humans; D008433:Mathematics; D014465:Ultrasonics