Speckle reduction in ultrasound endoscopy using refraction based elevational angular compounding

Speckle reduction in ultrasound endoscopy using refraction based elevational angular compounding

Abstract Endoscopic ultrasonography (EUS) is a safe, real-time diagnostic and therapeutic tool. Speckle noise, inherent to ultrasonography, degrades the diagnostic precision of EUS. Elevational angular compounding (EAC) can provide real-time speckle noise reduction; however, EAC has never been appli...

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Autores principales: Parastoo Afshari, Christian Zakian, Jeannine Bachmann, Vasilis Ntziachristos
Formato: article
Lenguaje:EN
Publicado: Nature Portfolio 2021
Materias:
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Science
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Acceso en línea:https://doaj.org/article/c8891c61a355489b8a0f0aa3e7b8541c
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spelling oai:doaj.org-article:c8891c61a355489b8a0f0aa3e7b8541c2021-12-02T18:50:48ZSpeckle reduction in ultrasound endoscopy using refraction based elevational angular compounding10.1038/s41598-021-97717-22045-2322https://doaj.org/article/c8891c61a355489b8a0f0aa3e7b8541c2021-09-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-97717-2https://doaj.org/toc/2045-2322Abstract Endoscopic ultrasonography (EUS) is a safe, real-time diagnostic and therapeutic tool. Speckle noise, inherent to ultrasonography, degrades the diagnostic precision of EUS. Elevational angular compounding (EAC) can provide real-time speckle noise reduction; however, EAC has never been applied to EUS because current implementations require costly and bulky arrays and are incompatible with the tight spatial constraints of hollow organs. Here we develop a radial implementation of a refraction-based elevational angular compounding technique (REACT) for EUS and demonstrate for the first time spatial compounding in a radial endoscopy. The proposed implementation was investigated in cylindrical phantoms and demonstrated superior suppression of ultrasound speckle noise and up to a two-fold improvement in signal- and contrast- ratios, compared to standard image processing techniques and averaging. The effect of elevational angular deflection on image fidelity was further investigated in a phantom with lymph node-like structures to determine the optimum elevational angular width for high speckle reduction efficiency while maintaining image fidelity. This study introduces REACT as a potential compact and low-cost solution to impart current radial echo-endoscopes with spatial compounding, which could enable accurate identification and precise sizing of lymph nodes in staging of gastrointestinal tract cancers.Parastoo AfshariChristian ZakianJeannine BachmannVasilis NtziachristosNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-8 (2021)
institution DOAJ
collection DOAJ
language EN
topic Medicine
R
Science
Q
spellingShingle Medicine
R
Science
Q
Parastoo Afshari
Christian Zakian
Jeannine Bachmann
Vasilis Ntziachristos
Speckle reduction in ultrasound endoscopy using refraction based elevational angular compounding
description Abstract Endoscopic ultrasonography (EUS) is a safe, real-time diagnostic and therapeutic tool. Speckle noise, inherent to ultrasonography, degrades the diagnostic precision of EUS. Elevational angular compounding (EAC) can provide real-time speckle noise reduction; however, EAC has never been applied to EUS because current implementations require costly and bulky arrays and are incompatible with the tight spatial constraints of hollow organs. Here we develop a radial implementation of a refraction-based elevational angular compounding technique (REACT) for EUS and demonstrate for the first time spatial compounding in a radial endoscopy. The proposed implementation was investigated in cylindrical phantoms and demonstrated superior suppression of ultrasound speckle noise and up to a two-fold improvement in signal- and contrast- ratios, compared to standard image processing techniques and averaging. The effect of elevational angular deflection on image fidelity was further investigated in a phantom with lymph node-like structures to determine the optimum elevational angular width for high speckle reduction efficiency while maintaining image fidelity. This study introduces REACT as a potential compact and low-cost solution to impart current radial echo-endoscopes with spatial compounding, which could enable accurate identification and precise sizing of lymph nodes in staging of gastrointestinal tract cancers.
format article
author Parastoo Afshari
Christian Zakian
Jeannine Bachmann
Vasilis Ntziachristos
author_facet Parastoo Afshari
Christian Zakian
Jeannine Bachmann
Vasilis Ntziachristos
author_sort Parastoo Afshari
title Speckle reduction in ultrasound endoscopy using refraction based elevational angular compounding
title_short Speckle reduction in ultrasound endoscopy using refraction based elevational angular compounding
title_full Speckle reduction in ultrasound endoscopy using refraction based elevational angular compounding
title_fullStr Speckle reduction in ultrasound endoscopy using refraction based elevational angular compounding
title_full_unstemmed Speckle reduction in ultrasound endoscopy using refraction based elevational angular compounding
title_sort speckle reduction in ultrasound endoscopy using refraction based elevational angular compounding
publisher Nature Portfolio
publishDate 2021
url https://doaj.org/article/c8891c61a355489b8a0f0aa3e7b8541c
work_keys_str_mv AT parastooafshari specklereductioninultrasoundendoscopyusingrefractionbasedelevationalangularcompounding
AT christianzakian specklereductioninultrasoundendoscopyusingrefractionbasedelevationalangularcompounding
AT jeanninebachmann specklereductioninultrasoundendoscopyusingrefractionbasedelevationalangularcompounding
AT vasilisntziachristos specklereductioninultrasoundendoscopyusingrefractionbasedelevationalangularcompounding
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