Consensus on Elastography of the Liver Response
guidelines; Radiology; stiffness; transient elastography; Nuclear Medicine & Medical Imaging; fibrosis; recommendations; clinical-use; noninvasive assessment; arfi
Barr R G; Ferraioli G; Levine D
Radiology
2016
2016-01
Journal Article or Conference Abstract Publication
n/a
The Role of Sonoelastography in Breast Lesions
liver; experience; strain elastography; guidelines; Radiology; elasticity; Nuclear Medicine & Medical Imaging; masses; recommendations; shear-wave elastography; clinical-use; ultrasound elastography; wfumb
There is a large body of published material that supports the use of elastography, both strain and shear wave, for characterization of breast lesions. To a lesser extent, elastography can be used in the detection of breast abnormalities. This article reviews the principles of elastography regarding breast imaging, reviews the techniques to perform both strain and shear wave elastography, and reviews the literature and discusses how elastography can be used to improve the characterization of breast lesions to allow for decrease in the number of short-term follow-up examinations and benign biopsies. (C) 2018 Elsevier Inc. All rights reserved.
Barr R G
Seminars in Ultrasound Ct and Mri
2018
2018-02
Journal Article or Conference Abstract Publication
<a href="http://doi.org/10.1053/j.sult.2017.05.010" target="_blank" rel="noreferrer noopener">10.1053/j.sult.2017.05.010</a>
An initial study of complete 2D shear wave dispersion images using a reverberant shear wave field
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
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.
Ormachea J; Parker K J; Barr R G
Physics in Medicine and Biology
2019
2019-07
<a href="http://doi.org/10.1088/1361-6560/ab2778" target="_blank" rel="noreferrer noopener">10.1088/1361-6560/ab2778</a>