Ultrasound Dereverberation/Deconvolution Filtering Based on Gaussian Mixture Modeling

Abhishek Sahoo, Anas Al-Hussayen, Nayef Alshamlan, Emad S. Ebbini

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Reverberation is a significant source of degradation in ultrasound imaging in regions with mixtures of scattering structures. Its effects vary from subtle to pronounced, but they can degrade both spatial and contrast resolutions. Deconvolution filters based on the system impulse response often improve axial resolution in uniform speckle regions, but may not perform optimally in complex scattering regions. We have developed an algorithm for the design of a dereverberation/deconvolution filter (DDF) based on a Gaussian mixture model (GMM) of echo data from heterogeneous tissues. RF data were collected using the LA 14-5 probe on a SonixRP scanner while imaging the femoral artery of a familial hypercholesterolemic swine in vivo under approved protocol. The tissues surrounding the target vessel included muscle, fat and connective tissue. Correlation cell sizes and echo statistics differed substantially, which justified the use of the GMM of order 5 for this FOV. The DDF filter was derived from A-lines passing through the vessel to capture short- and long-range spatial correlations, a key feature for estimating the GMM parameters. An expectation-maximization algorithm was used to derive the DDF coefficients while updating the GMM. The algorithm converges within a few iterations to a causally stable IIR filter with well-behaved impulse response. Further iterations allow the DDF to equalize the frequency response and achieve deconvolution without the need for regularization.

Original languageEnglish (US)
Title of host publication2019 IEEE International Ultrasonics Symposium, IUS 2019
PublisherIEEE Computer Society
Pages2071-2074
Number of pages4
ISBN (Electronic)9781728145969
DOIs
StatePublished - Oct 2019
Event2019 IEEE International Ultrasonics Symposium, IUS 2019 - Glasgow, United Kingdom
Duration: Oct 6 2019Oct 9 2019

Publication series

NameIEEE International Ultrasonics Symposium, IUS
Volume2019-October
ISSN (Print)1948-5719
ISSN (Electronic)1948-5727

Conference

Conference2019 IEEE International Ultrasonics Symposium, IUS 2019
CountryUnited Kingdom
CityGlasgow
Period10/6/1910/9/19

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Keywords

  • expectation maximization
  • pseudo-inverse operator
  • ultrasound clutter.

Cite this

Sahoo, A., Al-Hussayen, A., Alshamlan, N., & Ebbini, E. S. (2019). Ultrasound Dereverberation/Deconvolution Filtering Based on Gaussian Mixture Modeling. In 2019 IEEE International Ultrasonics Symposium, IUS 2019 (pp. 2071-2074). [8925768] (IEEE International Ultrasonics Symposium, IUS; Vol. 2019-October). IEEE Computer Society. https://doi.org/10.1109/ULTSYM.2019.8925768