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<a href="http://doi.org/10.1088/1361-6560/ab2778" target="_blank" rel="noreferrer noopener">http://doi.org/10.1088/1361-6560/ab2778</a>
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Pages
12-12
Issue
14
Volume
64
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Title
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An initial study of complete 2D shear wave dispersion images using a reverberant shear wave field
Publisher
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Physics in Medicine and Biology
Date
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2019
2019-07
Subject
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benign; clinical-use; deep; Diagnosis; elastography; Engineering; Nuclear Medicine & Medical Imaging; Radiology; recommendations; reverberant shear wave field; shear dispersion; shear elastography; soft; tissue; tissue viscoelasticity; viscoelasticity; wfumb guidelines
Creator
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Ormachea J; Parker K J; Barr R G
Description
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Within the field of elastography, a relatively new approach analyzes the limiting case of shear waves established as a reverberant field. In this framework, it is assumed that a distribution of shear waves exists, oriented across all directions in 3D and continuous in time. The simultaneous multi-frequency application of reverberant shear wave fields can be accomplished by applying an array of external sources that can be excited by multiple frequencies within a bandwidth, for example 50, 100, 150, ..., 500 Hz, all contributing to the shear wave field produced in the liver or other target organ. This enables the analysis of the dispersion of shear wave speed as it increases with frequency, indicating the viscoelastic and lossy nature of the tissue under study. Furthermore, dispersion images can be created and displayed alongside the shear wave speed images. We report preliminary studies on breast and liver tissues using the multi-frequency reverberant shear wave technique, employing frequencies up to 700 Hz in breast tissue, and robust reverberant patterns of shear waves across the entire liver and kidney in obese patients. Dispersion images are shown to have contrast between tissue types and with quantitative values that align with previous studies.
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<a href="http://doi.org/10.1088/1361-6560/ab2778" target="_blank" rel="noreferrer noopener">10.1088/1361-6560/ab2778</a>
2019
Barr R G
benign
clinical-use
deep
Department of Radiology
Diagnosis
elastography
Engineering
NEOMED College of Medicine
Nuclear Medicine & Medical Imaging
Ormachea J
Parker K J
Physics in Medicine and Biology
Radiology
recommendations
reverberant shear wave field
September 2019 Update
shear dispersion
shear elastography
soft
tissue
tissue viscoelasticity
viscoelasticity
wfumb guidelines