Titlebook: Scalar Diffraction from a Circular Aperture; Charles J. Daly,Navalgund A. H. K. Rao Book 2000 Springer Science+Business Media New York 200

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預(yù)感

MAOIS

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Spatially Averaged one-way Diffraction,n this chapter, we exploit this Fourier equivalence and derive a set of general, closed-form, frequency-domain expressions describing spatially averaged one-way diffraction for . piston transmitters and receivers. The expressions derived are general in the sense that the area of the receiver may be

的闡明

Spatially Averaged two-way Diffraction,n pulsed mode. Also recall from Chapter 1 that certain methods of tissue characterization involve spectral analysis of RF data. Results produced by these methods are biased by the transmit and receive impulse responses of the transducer and by two-way diffraction effects. The bias can be removed via

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Experimental Investigation,this chapter, an aspect of the proposed theory is investigated experimentally. Specifically, autoconvolution diffraction corrections will be implemented with time-varying filters, and diffraction-corrected B-mode images will be reconstructed using a short-time Fourier technique. The raw and diffract

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curriculum

Introduction,ientific community’s understanding of scalar diffraction from a circular aperture. When viewed in its entirety, this research attains all three goals by presenting rigorous derivations and original analyses that unify and extend existing theory with novel insights and generalized results.