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Acoustic radiation force impulse imaging of kidneys – a phantom study

AIM OF THE STUDY: Since there have been only few works reporting the diagnosis of kidneys using Acoustic Radiation Force Impulse technique and those works do not provide consistent results of shear wave velocity measurements in renal tissue, we have decided to use kidney phantoms with known properti...

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Autores principales: Cygan, Szymon, Januszewicz, Magdalena
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Medical Communications Sp. z o.o. 2016
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5269520/
https://www.ncbi.nlm.nih.gov/pubmed/28138404
http://dx.doi.org/10.15557/JoU.2016.0033
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author Cygan, Szymon
Januszewicz, Magdalena
author_facet Cygan, Szymon
Januszewicz, Magdalena
author_sort Cygan, Szymon
collection PubMed
description AIM OF THE STUDY: Since there have been only few works reporting the diagnosis of kidneys using Acoustic Radiation Force Impulse technique and those works do not provide consistent results of shear wave velocity measurements in renal tissue, we have decided to use kidney phantoms with known properties to examine the reliability of the method itself in a controlled setup similar to kidneys examination. MATERIALS AND METHODS: Four gelatin-based phantoms imitating different clinical situations were manufactured – two with thick and two with thin renal cortex, each type at a depth similar to a normal-weight or overweight patient. For each phantom, a series of interest points was chosen and for each point 20 Shear Wave Velocity measurements were taken using the build-in Virtual Touch Tissue Quantification(™) tool in a Siemens Acuson S2000 ultrasound scanner equipped with a 6C1 HD Transducer (Siemens Mountainview, USA). RESULTS: Mean Shear Wave Velocity values obtained for all the examined points ranged from 2.445 to 3.941 m/s, with standard deviation exceeding 0.1 in only one case out of 29 points, but differing significantly between all points. CONCLUSIONS: The obtained results indicate that the method is highly reliable as long as the measurement volume contains a uniform tissue region. If the measurement window covers a region with different properties even partially, the obtained results are affected. The variance of measured values on the other hand is not affected by the said non-uniformity of material under examination. Furthermore, the variance of measured values does not show a clear dependency on the depth at which the shear wave velocities are measured.
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spelling pubmed-52695202017-01-30 Acoustic radiation force impulse imaging of kidneys – a phantom study Cygan, Szymon Januszewicz, Magdalena J Ultrason Original Paper AIM OF THE STUDY: Since there have been only few works reporting the diagnosis of kidneys using Acoustic Radiation Force Impulse technique and those works do not provide consistent results of shear wave velocity measurements in renal tissue, we have decided to use kidney phantoms with known properties to examine the reliability of the method itself in a controlled setup similar to kidneys examination. MATERIALS AND METHODS: Four gelatin-based phantoms imitating different clinical situations were manufactured – two with thick and two with thin renal cortex, each type at a depth similar to a normal-weight or overweight patient. For each phantom, a series of interest points was chosen and for each point 20 Shear Wave Velocity measurements were taken using the build-in Virtual Touch Tissue Quantification(™) tool in a Siemens Acuson S2000 ultrasound scanner equipped with a 6C1 HD Transducer (Siemens Mountainview, USA). RESULTS: Mean Shear Wave Velocity values obtained for all the examined points ranged from 2.445 to 3.941 m/s, with standard deviation exceeding 0.1 in only one case out of 29 points, but differing significantly between all points. CONCLUSIONS: The obtained results indicate that the method is highly reliable as long as the measurement volume contains a uniform tissue region. If the measurement window covers a region with different properties even partially, the obtained results are affected. The variance of measured values on the other hand is not affected by the said non-uniformity of material under examination. Furthermore, the variance of measured values does not show a clear dependency on the depth at which the shear wave velocities are measured. Medical Communications Sp. z o.o. 2016-12-30 2016-12 /pmc/articles/PMC5269520/ /pubmed/28138404 http://dx.doi.org/10.15557/JoU.2016.0033 Text en 2016 Polish Ultrasound Society. Published by Medical Communications Sp. z o.o. All rights reserved. http://creativecommons.org/licenses/by-nc-nd This is an open-access article distributed under the terms of the Creative Commons Attribution-NonCommercial-NoDerivatives License (CC BY-NC-ND). Reproduction is permitted for personal, educational, non-commercial use, provided that the original article is in whole, unmodified, and properly cited.
spellingShingle Original Paper
Cygan, Szymon
Januszewicz, Magdalena
Acoustic radiation force impulse imaging of kidneys – a phantom study
title Acoustic radiation force impulse imaging of kidneys – a phantom study
title_full Acoustic radiation force impulse imaging of kidneys – a phantom study
title_fullStr Acoustic radiation force impulse imaging of kidneys – a phantom study
title_full_unstemmed Acoustic radiation force impulse imaging of kidneys – a phantom study
title_short Acoustic radiation force impulse imaging of kidneys – a phantom study
title_sort acoustic radiation force impulse imaging of kidneys – a phantom study
topic Original Paper
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5269520/
https://www.ncbi.nlm.nih.gov/pubmed/28138404
http://dx.doi.org/10.15557/JoU.2016.0033
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