Numerical modeling of ultrasound propagation in heterogeneous media using a mixed domain method
A mixed domain method (MDM) is presented in this paper for modeling one-way linear/nonlinear wave propagation in biological tissue with arbitrary heterogeneities, in which sound speed, density, attenuation coefficients, and nonlinear coefficients are all spatial varying functions. The MDM is based o...
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| Published in | The Journal of the Acoustical Society of America Vol. 144; no. 3; p. 1790 |
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| Main Authors | , |
| Format | Journal Article |
| Language | English |
| Published |
01.09.2018
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| Online Access | Get full text |
| ISSN | 0001-4966 1520-8524 |
| DOI | 10.1121/1.5067903 |
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| Summary: | A mixed domain method (MDM) is presented in this paper for modeling one-way linear/nonlinear wave propagation in biological tissue with arbitrary heterogeneities, in which sound speed, density, attenuation coefficients, and nonlinear coefficients are all spatial varying functions. The MDM is based on solving a Westervelt-like equation. We validated the algorithm by studying a number of one-dimensional and two-dimensional problems. Overall, this study demonstrates that the MDM is a computationally efficient and accurate method when used to model wave propagation in biological tissue with relatively weak heterogeneities. We also proposed methods to improve the algorithm for moderately heterogeneous media. |
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| ISSN: | 0001-4966 1520-8524 |
| DOI: | 10.1121/1.5067903 |