Document Detail


k-space propagation models for acoustically heterogeneous media: application to biomedical photoacoustics.
MedLine Citation:
PMID:  17552697     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Biomedical applications of photoacoustics, in particular photoacoustic tomography, require efficient models of photoacoustic propagation that can incorporate realistic properties of soft tissue, such as acoustic inhomogeneities both for purposes of simulation and for use in model-based image reconstruction methods. k-space methods are well suited to modeling high-frequency acoustics applications as they require fewer mesh points per wavelength than conventional finite element and finite difference models, and larger time steps can be taken without a loss of stability or accuracy. They are also straightforward to encode numerically, making them appealing as a general tool. The rationale behind k-space methods and the k-space approach to the numerical modeling of photoacoustic waves in fluids are covered in this paper. Three existing k-space models are applied to photoacoustics and demonstrated with examples: an exact model for homogeneous media, a second-order model that can take into account heterogeneous media, and a first-order model that can incorporate absorbing boundary conditions.
Authors:
B T Cox; S Kara; S R Arridge; P C Beard
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  The Journal of the Acoustical Society of America     Volume:  121     ISSN:  1520-8524     ISO Abbreviation:  J. Acoust. Soc. Am.     Publication Date:  2007 Jun 
Date Detail:
Created Date:  2007-06-07     Completed Date:  2007-08-17     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  7503051     Medline TA:  J Acoust Soc Am     Country:  United States    
Other Details:
Languages:  eng     Pagination:  3453-64     Citation Subset:  IM    
Affiliation:
Department of Medical Physics and Bioengineering, University College London, Gower Street, London WC1E 6BT, United Kingdom. bencox@mpb.ucl.ac.uk
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MeSH Terms
Descriptor/Qualifier:
Acoustics*
Biomedical Technology / methods
Lasers
Light
Models, Theoretical*
Normal Distribution
Poisson Distribution
Radio Waves
Reproducibility of Results
Tomography / methods

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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