The intensity point signal-to-noise ratio, SNRI, characterizing the ultrasound speckle statistics, depends on the tissue scattering microstructure and the imaging systems point spread function. Both should be described in three-dimensional space. Therefore, a three-dimensional simulation model is used in this paper to generate a rf signal and study the variations in SNRI with the transducer center frequency and bandwidth. Results are in agreement with existing theoretical predictions. A possible method to analyze the SNRI data is also presented that can produce a straight line slope as a feature value that depends on the tissue scattering microstructure only. Such a feature may prove to be more useful than SNRI values in tissue characterization problems.
Department, Program, or Center
Chester F. Carlson Center for Imaging Science (COS)
N. A. H. K. Rao, H. Zhu, "Simulation study of changes in ultrasound speckle statistics with the system point spread function", J. Acoust. Soc. Amer., vol. 95, pp. 1161-1164, 1994 https://doi.org/10.1121/1.408474
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