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

Authors :
Treeby B
Lucka F
Martin E
Cox BT
Source :
IEEE transactions on ultrasonics, ferroelectrics, and frequency control [IEEE Trans Ultrason Ferroelectr Freq Control] 2018 Oct; Vol. 65 (10), pp. 1857-1864. Date of Electronic Publication: 2018 Aug 01.
Publication Year :
2018

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.

Details

Language :
English
ISSN :
1525-8955
Volume :
65
Issue :
10
Database :
MEDLINE
Journal :
IEEE transactions on ultrasonics, ferroelectrics, and frequency control
Publication Type :
Academic Journal
Accession number :
30072321
Full Text :
https://doi.org/10.1109/TUFFC.2018.2861895