Adaptive focusing in scattering media through sound‐speed inhomogeneities: The van Cittert Zernike approach and focusing criterion
作者:
Raoul Mallart,
Mathias Fink,
期刊:
The Journal of the Acoustical Society of America
(AIP Available online 1994)
卷期:
Volume 96,
issue 6
页码: 3721-3732
ISSN:0001-4966
年代: 1994
DOI:10.1121/1.410562
出版商: Acoustical Society of America
关键词: SOUND WAVES;SCATTERING;FOCUSING;SOUND VELOCITY;INHOMOGENEOUS MATERIALS;ABERRATIONS;ULTRASONOGRAPHY
数据来源: AIP
摘要:
An original formalism that allows a thorough understanding of cross‐correlation‐based phase aberration correction techniques in a scattering medium is developed. This formalism is based on the analysis of the second‐order statistics of the pressure field scattered by a random distribution of scatterers. One of the major interests of this analysis is the ability it provides to evaluate and monitor the convergence of phase aberration correction techniques. This is achieved by the computation of a single parameterCthat serves as a focusing criterion. The theoretical developments are validated experimentally.
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