Local scattering ultrasound imaging

Abstract Ultrasonic imaging is a widely used tool for detection, localisation and characterisation of material inhomogeneities with important applications in many fields. This task is particularly challenging when imaging in a complex medium, where the ultrasonic wave is scattered by the material mi...

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Autores principales:	Alexander Velichko, Eduardo Lopez Villaverde, Anthony J. Croxford
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/d8ce1ac06e5d426c8c6e4afe993c05fa
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spelling	oai:doaj.org-article:d8ce1ac06e5d426c8c6e4afe993c05fa2021-12-02T14:12:40ZLocal scattering ultrasound imaging10.1038/s41598-020-79617-z2045-2322https://doaj.org/article/d8ce1ac06e5d426c8c6e4afe993c05fa2021-01-01T00:00:00Zhttps://doi.org/10.1038/s41598-020-79617-zhttps://doaj.org/toc/2045-2322Abstract Ultrasonic imaging is a widely used tool for detection, localisation and characterisation of material inhomogeneities with important applications in many fields. This task is particularly challenging when imaging in a complex medium, where the ultrasonic wave is scattered by the material microstructure, preventing detection and characterisation of weak targets. Fundamentally, the maximum information that can be experimentally obtained from each material region consists of a set of reflected signals for different incident waves. However, these data are not directly accessible from the raw measurements, which represent a superposition of reflections from all scatterers in the medium. Here we show, that a complete set of transmitter–receiver data encodes sufficient information in order to achieve full spatio–temporal separation of transmitter–receiver data, corresponding to different local scattering areas. We show that access to the local scattering data can provide valuable benefits for many applications. More importantly, this technique enables fundamentally new approaches, exploiting the angular distribution of the scattering amplitude and phase of each local scattering region. Here we demonstrate how the local scattering directivity can be used to build the local scattering image, releasing the full potential and richness of the transmit–receive data. As a proof of concept, we demonstrate the detection of small inclusions in various highly scattering materials using numerical and experimental examples. The described principles are very general and can be applied to any research field where the phased array technology is employed.Alexander VelichkoEduardo Lopez VillaverdeAnthony J. CroxfordNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-11 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Alexander Velichko Eduardo Lopez Villaverde Anthony J. Croxford Local scattering ultrasound imaging
description	Abstract Ultrasonic imaging is a widely used tool for detection, localisation and characterisation of material inhomogeneities with important applications in many fields. This task is particularly challenging when imaging in a complex medium, where the ultrasonic wave is scattered by the material microstructure, preventing detection and characterisation of weak targets. Fundamentally, the maximum information that can be experimentally obtained from each material region consists of a set of reflected signals for different incident waves. However, these data are not directly accessible from the raw measurements, which represent a superposition of reflections from all scatterers in the medium. Here we show, that a complete set of transmitter–receiver data encodes sufficient information in order to achieve full spatio–temporal separation of transmitter–receiver data, corresponding to different local scattering areas. We show that access to the local scattering data can provide valuable benefits for many applications. More importantly, this technique enables fundamentally new approaches, exploiting the angular distribution of the scattering amplitude and phase of each local scattering region. Here we demonstrate how the local scattering directivity can be used to build the local scattering image, releasing the full potential and richness of the transmit–receive data. As a proof of concept, we demonstrate the detection of small inclusions in various highly scattering materials using numerical and experimental examples. The described principles are very general and can be applied to any research field where the phased array technology is employed.
format	article
author	Alexander Velichko Eduardo Lopez Villaverde Anthony J. Croxford
author_facet	Alexander Velichko Eduardo Lopez Villaverde Anthony J. Croxford
author_sort	Alexander Velichko
title	Local scattering ultrasound imaging
title_short	Local scattering ultrasound imaging
title_full	Local scattering ultrasound imaging
title_fullStr	Local scattering ultrasound imaging
title_full_unstemmed	Local scattering ultrasound imaging
title_sort	local scattering ultrasound imaging
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/d8ce1ac06e5d426c8c6e4afe993c05fa
work_keys_str_mv	AT alexandervelichko localscatteringultrasoundimaging AT eduardolopezvillaverde localscatteringultrasoundimaging AT anthonyjcroxford localscatteringultrasoundimaging
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Local scattering ultrasound imaging

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