Frequency-dependent effective cell volume estimation for circular disk transducers using Lommel diffraction formulation

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Title: Frequency-dependent effective cell volume estimation for circular disk transducers using Lommel diffraction formulation
Author: Rao, Navalgund; Lai, Di
Abstract: In medical ultrasonic imaging the signal reflected from the tissue often has a random character to it. It is believed that the random nature of the tissue scattering microstructure is responsible for the stochastic nature of the echo signal. Chen, et. al. Have proposed a signal processing scheme that is based on the statistical moments calculated on the Fourier transform of the time gated echo signal. The theory requires the knowledge of a frequency- dependent effective cell volume term. This paper describes the use of a closed form expression (Lommel diffraction formulation) for this purpose. Our simulation results suggest that reliable estimation of the cell volume is possible only when the time duration of the excitation pulse is small compared to the time gate length.
Description: Copyright 2001 Society of Photo-Optical Instrumentation Engineers. This paper was published in the Proceedings of Medical Imaging 2001: Ultrasonic Imaging and Signal Processing, SPIE vol. 4325, and is made available as an electronic reprint with permission of SPIE. One print or electronic copy may be made for personal use only. Systematic or multiple reproduction, distribution to multiple locations via electronic or other means, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper are prohibited.
Record URI: http://hdl.handle.net/1850/3201
Date: 2001-05

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