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Equivalent-Source Acoustic Holography for Projecting Measured Ultrasound Fields Through Complex Media

Treeby, B; Lucka, F; Martin, E; Cox, BT; (2018) Equivalent-Source Acoustic Holography for Projecting Measured Ultrasound Fields Through Complex Media. IEEE Trans Ultrason Ferroelectr Freq Control , 65 (10) pp. 1857-1864. 10.1109/TUFFC.2018.2861895. Green open access

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Abstract

Holographic projections of experimental ultrasound measurements generally use the angular spectrum method or Rayleigh integral, where the measured data are imposed as a Dirichlet boundary condition. In contrast, full-wave models, which can account for more complex wave behavior, often use interior mass or velocity sources to introduce acoustic energy into the simulation. Here, a method to generate an equivalent interior source that reproduces the measurement data is proposed based on gradient-based optimization. The equivalent-source can then be used with full-wave models (for example, the open-source k-Wave toolbox) to compute holographic projections through complex media including nonlinearity and heterogeneous material properties. Numerical and experimental results using both time-domain and continuous-wave sources are used to demonstrate the accuracy of the approach.

Type: Article
Title: Equivalent-Source Acoustic Holography for Projecting Measured Ultrasound Fields Through Complex Media
Location: United States
Open access status: An open access version is available from UCL Discovery
DOI: 10.1109/TUFFC.2018.2861895
Publisher version: https://doi.org/10.1109/TUFFC.2018.2861895
Language: English
Additional information: © 2018 IEEE. This work is licensed under a Creative Commons Attribution 3.0 License. For more information, see (http://creativecommons.org/licenses/by/3.0/)
Keywords: Holography, equivalent-source, full-wave modelling, gradient-based optimisation
UCL classification: UCL
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Computer Science
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Med Phys and Biomedical Eng
URI: https://discovery.ucl.ac.uk/id/eprint/10054327
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