Combined Tissue Imaging Technique: Deconvolved Inverse Scattering Impedance Imaging with Account of the Second Harmonic Signal

Kharin, Nikolay; Driscoll, Diana; Tobocman, W.

doi:10.1063/1.2210359

Cited by 1 publication

(1 citation statement)

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“…1 Publications on THI began with a trio of papers in 1997 by Averkiou et al, 2 Ward et al, 3 and Christopher. 4 These and more recent papers [5][6][7][8][9][10][11][12] (see also the list of citations in Ref. 8) report numerical and experimental results illustrating the benefits of THI and aiming to identify the underlying physical mechanisms.…”

Section: Introductionmentioning

confidence: 99%

Statistical model of clutter suppression in tissue harmonic imaging

Yan

Hamilton

2011

The Journal of the Acoustical Society of America

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A statistical model is developed for the suppression of clutter in tissue harmonic imaging (THI). Tissue heterogeneity is modeled as a random phase screen that is characterized by its correlation length and variance. With the autocorrelation function taken to be Gaussian and for small variance, statistical solutions are derived for the mean intensities at the fundamental and second-harmonic frequencies in the field of a focused sound beam that propagates through the phase screen. The statistical solutions are verified by comparison with ensemble averaging of direct numerical simulations. The model demonstrates that THI reduces the aberration clutter appearing in the focal region regardless of the depth of the aberrating layer, with suppression of the clutter most effective when the layer is close to the source. The model is also applied to the reverberation clutter that is transmitted forward along the axis of the beam. As with aberration clutter, suppression of such reverberation clutter by THI is most pronounced when the tissue heterogeneity is located close to the source.

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