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