1
40
11
-
Text
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URL Address
<a href="http://doi.org/10.1002/jum.15190" target="_blank" rel="noreferrer noopener">http://doi.org/10.1002/jum.15190</a>
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Article information provided for research and reference use only. All rights are retained by the journal listed under publisher and/or the creator(s).
ISSN
1550-9613
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Update Year & Number
January 2020 Update
NEOMED College
NEOMED College of Medicine
NEOMED Department
Department of Radiology
Dublin Core
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Title
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Can Accurate Shear Wave Velocities Be Obtained in Kidneys?
Publisher
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Journal of Ultrasound in Medicine: Official Journal of the American Institute of Ultrasound in Medicine
Date
A point or period of time associated with an event in the lifecycle of the resource
2019
2019-12-03
Subject
The topic of the resource
artifacts; kidney; renal; shear wave elastography
Creator
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Barr Richard G
Description
An account of the resource
OBJECTIVES: There are conflicting results in the literature on the use of shear wave elastography of the kidney parenchyma to determine whether renal stiffness values are related to a disease process. This study was conducted to evaluate the raw data from 3 ultrasound systems and determine whether adequate displacement curves are obtained to accurately estimate shear wave speeds. METHODS: Shear wave elastography was performed on 5 healthy volunteers with 3 ultrasound systems. The raw data were collected and evaluated for the shear wave propagation quality to determine whether accurate estimates of renal shear wave speeds could be determined. RESULTS: Results from the 3 machines demonstrate that accurate shear wave displacement curves are not obtained with renal elastography on existing systems (as of June 2018). One vendor has recently released software that appears to acquire accurate shear wave displacements. CONCLUSIONS: Elastographic studies performed on the kidney to date are likely to be inaccurate. A new algorithm that appears to acquire accurate shear wave displacements in the kidney has been developed. Additional studies are needed to confirm that the new algorithm provides accurate clinical results. This study demonstrates that although the system provides a shear wave speed, it is important to confirm the accuracy of that number by evaluating the raw data.
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<a href="http://doi.org/10.1002/jum.15190" target="_blank" rel="noreferrer noopener">10.1002/jum.15190</a>
PMID: 31797411
Format
The file format, physical medium, or dimensions of the resource
Journal Article
2019
Artifacts
Barr Richard G
Department of Radiology
January 2020 Update
Journal Article
Journal of Ultrasound in Medicine: Official Journal of the American Institute of Ultrasound in Medicine
Kidney
Mercy Health St Elizabeth Boardman Hospital
NEOMED College of Medicine
renal
Shear wave elastography
-
Text
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URL Address
<a href="http://doi.org/10.2309/j.java.2019.002.001" target="_blank" rel="noreferrer noopener">http://doi.org/10.2309/j.java.2019.002.001</a>
Rights
Article information provided for research and reference use only. All rights are retained by the journal listed under publisher and/or the creator(s).
Pages
21-26
Issue
2
Volume
24
ISSN
1552-8855
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<a href="http://ezproxy.neomed.idm.oclc.org/login?url=http://doi.org/10.2309/j.java.2019.002.001" target="_blank" rel="noreferrer noopener">NEOMED Full-text Holding (if available) - Proxy DOI: 10.2309/j.java.2019.002.001</a>
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Title
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Sharp Recanalization of a Chronically Occluded Superior Vena Cava in a Patient with Multiple Prior Peripherally Inserted Central Catheters.
Publisher
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Journal Of The Association For Vascular Access
Date
A point or period of time associated with an event in the lifecycle of the resource
2019
2019-06
Subject
The topic of the resource
Adult; Female; Tomography X-Ray Computed; Radiography Thoracic; Diagnostic Imaging; Fluoroscopy; Stents; Venous Thrombosis; Cystic Fibrosis; Angiography Digital Subtraction; Angioplasty Balloon; Catheter Occlusion; Catheterization -- Methods; Heparin Low-Molecular-Weight -- Administration and Dosage; Peripherally Inserted Central Catheters; Vena Cava Superior -- Pathology; Venous Insufficiency
Creator
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Shwaiki Omar; Khoncarly Sarah; Buchino James J; McDaniel Janice
Description
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Purpose: To present a unique case in which intravenous medications were administered intermittently through a peripherally inserted central catheter (PICC) line over 2 years in the presence of an occluded superior vena cava (SVC) due to impressive collateral development. However, SVC recanalization was ultimately needed to allow for long-term future access needs. Case Description: This is a 25-year-old female with cystic fibrosis with known chronic occlusion of the SVC requiring multiple ports and PICC lines to maintain venous access. Despite conservative measures, it eventually became impossible to pass the occlusion via guidewire to properly place a PICC line. Sharp recanalization of the SVC occlusion with port placement was scheduled and successfully performed. The SVC was stented due to severe residual stenosis following recanalization and balloon angioplasty. Results: Imaging revealed a significantly enlarged hemiazygos vein and numerous prominent collaterals throughout the mediastinum and chest wall, resulting in the majority of chest venous drainage entering the inferior vena cava. After recanalization, her SVC and port remained patent and functional. Conclusions: For patients with SVC occlusion requiring venous access, a PICC line with the tip placed near the confluence of the brachiocephalic veins may serve as a temporary method for venous access in the presence of extensive collateral flow. However, for long-term access, sharp recanalization of the occlusion should be considered to restore normal laminar blood flow patterns and allow for optimum central venous catheter tip placement at the cavoatrial junction.
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<a href="http://doi.org/10.2309/j.java.2019.002.001" target="_blank" rel="noreferrer noopener">10.2309/j.java.2019.002.001</a>
Format
The file format, physical medium, or dimensions of the resource
Journal Article
2019
Adult
Akron Children's Hospital
Angiography Digital Subtraction
Angioplasty Balloon
Buchino James J
Catheter Occlusion
Catheterization -- Methods
CYSTIC fibrosis
Department of Radiology
Diagnostic Imaging
Female
Fluoroscopy
Heparin Low-Molecular-Weight -- Administration and Dosage
Journal Article
Journal Of The Association For Vascular Access
Khoncarly Sarah
McDaniel Janice
NEOMED College of Medicine
NEOMED College of Medicine Student
NEOMED Student Publications
November 2019 Update
Peripherally Inserted Central Catheters
Radiography Thoracic
Shwaiki Omar
Stents
Tomography X-Ray Computed
Vena Cava Superior -- Pathology
Venous Insufficiency
Venous Thrombosis
-
Text
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URL Address
<a href="http://doi.org/10.1002/jum.15137" target="_blank" rel="noreferrer noopener">http://doi.org/10.1002/jum.15137</a>
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ISSN
1550-9613
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<a href="http://ezproxy.neomed.idm.oclc.org/login?url=http://doi.org/10.1002/jum.15137" target="_blank" rel="noreferrer noopener">NEOMED Full-text Holding (if available) - Proxy DOI: 10.1002/jum.15137</a>
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Title
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Breast Elastography: How to Perform and Integrate Into a "Best-Practice" Patient Treatment Algorithm
Publisher
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Journal Of Ultrasound In Medicine: Official Journal Of The American Institute Of Ultrasound In Medicine
Date
A point or period of time associated with an event in the lifecycle of the resource
2019
2019-10-16
Subject
The topic of the resource
breast cancer; breast; elastography; shear wave elastography; strain elastography; breast tumors; sonoelastography
Creator
An entity primarily responsible for making the resource
Barr Richard G
Description
An account of the resource
Breast elastography has been available for more than 15 years but is not widely incorporated into clinical practice. Many publications report extremely high accuracy for various breast elastographic techniques. However, results in the literature are extremely variable. This variability is most likely due to variations in technique, a relatively steep learning curve, and variability in methods between vendors. This article describes our protocol for performing breast elastography using both strain elastography and shear wave elastography, which produces high sensitivity and specificity. Additionally, we will describe the most commonly known false-positive and false-negative lesions as well as how to detect them.
Identifier
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<a href="http://doi.org/10.1002/jum.15137" target="_blank" rel="noreferrer noopener">10.1002/jum.15137</a>
PMID: 31617225
Format
The file format, physical medium, or dimensions of the resource
Journal Article
2019
Barr Richard G
breast
breast cancer
breast tumors
Department of Radiology
elastography
Journal Article
Journal of Ultrasound in Medicine: Official Journal of the American Institute of Ultrasound in Medicine
Mercy Health St Elizabeth Boardman Hospital
NEOMED College of Medicine
November 2019 Update
Shear wave elastography
sonoelastography
Strain elastography
-
Text
A resource consisting primarily of words for reading. Examples include books, letters, dissertations, poems, newspapers, articles, archives of mailing lists. Note that facsimiles or images of texts are still of the genre Text.
URL Address
<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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Article information provided for research and reference use only. All rights are retained by the journal listed under publisher and/or the creator(s).
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
A point or period of time associated with an event in the lifecycle of the resource
2019
2019-07
Subject
The topic of the resource
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
An entity primarily responsible for making the resource
Ormachea J; Parker K J; Barr R G
Description
An account of the resource
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.
Identifier
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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
-
Text
A resource consisting primarily of words for reading. Examples include books, letters, dissertations, poems, newspapers, articles, archives of mailing lists. Note that facsimiles or images of texts are still of the genre Text.
URL Address
<a href="http://doi.org/10.1097/ruq.0000000000000398" target="_blank" rel="noreferrer noopener">http://doi.org/10.1097/ruq.0000000000000398</a>
Pages
82–87
Issue
1
Volume
35
ISSN
0894-8771
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Title
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A Clinical Study Comparing the Diagnostic Performance of Assist Strain Ratio Against Manual Strain Ratio in Ultrasound Breast Elastography
Publisher
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Ultrasound Quarterly
Date
A point or period of time associated with an event in the lifecycle of the resource
2019
2019-03
Subject
The topic of the resource
breast cancer; elastography; cancer; guidelines; Radiology; elasticity; strain; Nuclear Medicine & Medical Imaging; us; recommendations; society; strain ratio; fat-to-lesion ratio; FLR
Creator
An entity primarily responsible for making the resource
Barr R G; Managuli R A
Description
An account of the resource
Objective Strain ratio (SR) is a semiquantitative parameter in differentiating benign from malignant tumors in breast ultrasound elastography. Currently, SR is computed manually and, thus, user dependent. The objective of this study was to evaluate the performance of a new tool assist strain ratio (ASR) and determine how it performs compared with an expert sonologist. Methods Ninety-one patients scheduled for breast biopsy were included in this institutional review board-approved/Health Insurance Portability and Accountability Act-compliant study. For manual strain ratio (MSR), fat and lesion were manually outlined, whereas for ASR, the clinician indicated the lesion center and the fat-to-lesion ratio is computed automatically. Three measurements were obtained for each lesion. The same raw data were used to calculate the MSR and ASR. Results The SR thresholds to differentiate benign from malignant tumors were determined using the Youden index. For MSR, the cutoff was 2.7, and for ASR was 2.8. The MSR showed a sensitivity of 88%, specificity of 64%, accuracy of 77%, positive predictive value of 72%, and negative predictive value of 92.1%. Corresponding ASR showed a sensitivity of 86%, specificity of 76%, accuracy of 81%, positive predictive value of 79%, and negative predictive value of 84%. The areas under the curve for the MSR and ASR were 0.83 and 0.85, respectively. The average coefficients of variation for the MSR and ASR measurements were 43% and 30%, respectively. Conclusion Assist strain ratio demonstrated similar diagnostic performance compared with MSR. In addition, the coefficient of variation of ASR is lower, implying lower intraoperator dependency. Thus, ASR may aid less-experienced scanners in obtaining improved results.
Identifier
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<a href="http://doi.org/10.1097/ruq.0000000000000398" target="_blank" rel="noreferrer noopener">10.1097/ruq.0000000000000398</a>
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Article information provided for research and reference use only. All rights are retained by the journal listed under publisher and/or the creator(s).
2019
Barr R G
breast cancer
Cancer
Department of Radiology
Elasticity
elastography
fat-to-lesion ratio
FLR
guidelines
June 2019 Update
Managuli R A
NEOMED College of Medicine
Nuclear Medicine & Medical Imaging
Radiology
recommendations
society
strain
Strain ratio
Ultrasound quarterly
us
-
Text
A resource consisting primarily of words for reading. Examples include books, letters, dissertations, poems, newspapers, articles, archives of mailing lists. Note that facsimiles or images of texts are still of the genre Text.
URL Address
<a href="http://doi.org/10.1002/jum.14990" target="_blank" rel="noreferrer noopener">http://doi.org/10.1002/jum.14990</a>
Pages
1139–1139
Issue
5
Volume
38
ISSN
0278-4297
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Title
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Just Because There is a Button Doesn't Mean it is Appropriate to Use or That it will Give Accurate Information
Publisher
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Journal of Ultrasound in Medicine
Date
A point or period of time associated with an event in the lifecycle of the resource
2019
2019-05
Subject
The topic of the resource
ultrasound; Acoustics; Radiology; safety; Nuclear Medicine & Medical Imaging
Creator
An entity primarily responsible for making the resource
Barr R G
Identifier
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<a href="http://doi.org/10.1002/jum.14990" target="_blank" rel="noreferrer noopener">10.1002/jum.14990</a>
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Article information provided for research and reference use only. All rights are retained by the journal listed under publisher and/or the creator(s).
2019
Acoustics
Barr R G
Department of Radiology
Journal of Ultrasound in Medicine
June 2019 Update
NEOMED College of Medicine
Nuclear Medicine & Medical Imaging
Radiology
Safety
Ultrasound
-
Text
A resource consisting primarily of words for reading. Examples include books, letters, dissertations, poems, newspapers, articles, archives of mailing lists. Note that facsimiles or images of texts are still of the genre Text.
URL Address
<a href="http://doi.org/10.1097/RUQ.0000000000000460" target="_blank" rel="noreferrer noopener">http://doi.org/10.1097/RUQ.0000000000000460</a>
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Article information provided for research and reference use only. All rights are retained by the journal listed under publisher and/or the creator(s).
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Title
A name given to the resource
Letter to the Editor
Publisher
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Ultrasound Quarterly
Date
A point or period of time associated with an event in the lifecycle of the resource
2019
2019-05
Creator
An entity primarily responsible for making the resource
Barr Richard G
Identifier
An unambiguous reference to the resource within a given context
<a href="http://doi.org/10.1097/RUQ.0000000000000460" target="_blank" rel="noreferrer noopener">10.1097/RUQ.0000000000000460</a>
2019
Barr Richard G
Department of Radiology
June 2019 Update
NEOMED College of Medicine
Ultrasound quarterly
-
Text
A resource consisting primarily of words for reading. Examples include books, letters, dissertations, poems, newspapers, articles, archives of mailing lists. Note that facsimiles or images of texts are still of the genre Text.
URL Address
<a href="http://doi.org/10.1002/jum.14849" target="_blank" rel="noreferrer noopener">http://doi.org/10.1002/jum.14849</a>
Rights
Article information provided for research and reference use only. All rights are retained by the journal listed under publisher and/or the creator(s).
Pages
1397-1404
Issue
6
Volume
38
Dublin Core
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Title
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Diagnostic Performance and Accuracy of the 3 Interpreting Methods of Breast Strain Elastography: A Systematic Review and Meta-analysis
Publisher
An entity responsible for making the resource available
Journal of Ultrasound in Medicine: Official Journal of the American Institute of Ultrasound in Medicine
Date
A point or period of time associated with an event in the lifecycle of the resource
2019
2019-06
Subject
The topic of the resource
breast; breast cancer; breast tumors; elastography; sonoelastography
Creator
An entity primarily responsible for making the resource
Barr Richard G; De Silvestri Annalisa; Scotti Valeria; Manzoni Federica; Rebuffi Chiara; Capittini Cristina; Tinelli Carmine
Description
An account of the resource
There are 3 methods of interpreting breast strain elastography: the elastographic-to-B-mode length ratio (E/B), a 5-point color scale (5P), and the strain ratio (SR). This meta-analysis assessed which method is superior to the others. A systematic search of the medical literature was performed in July 2017. Studies were eligible for inclusion if they fulfilled the following criteria: (1) had biopsy-proven or long-term stability as the reference standard; (2) used either the E/B, 5P, or SR to interpret results; and (3) had at least 50 cases. A total of 220 records were retrieved; 60 full-text articles were examined, and 46 were included in the meta-analysis. Publication years ranged from 2007 and 2017. The quality of studies was generally high. The mean age of women was 48 years; 12,398 lesions (4242 malignant) were analyzed. For the 5P method, the sensitivity was 77%; specificity, 87%; positive likelihood ratio (LR), 5.3; and negative LR, 0.24. For the SR method, sensitivity was 87%; specificity, 81%; positive LR, 4.8; and negative LR, 0.16. For the E/B method, sensitivity was 96%; specificity, 88%; positive LR, 7.1; and negative LR, 0.03. Of the 3 methods, the E/B had the highest sensitivity, and the E/B and 5P had the highest specificity. With a negative LR of 0.03, the E/B method can downgrade lesions with a pretest probability of 50% to a 2% probability of malignancy.
Identifier
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<a href="http://doi.org/10.1002/jum.14849" target="_blank" rel="noreferrer noopener">10.1002/jum.14849</a>
2019
Barr Richard G
breast
breast cancer
breast tumors
Capittini Cristina
De Silvestri Annalisa
Department of Radiology
elastography
Journal of Ultrasound in Medicine: Official Journal of the American Institute of Ultrasound in Medicine
June 2019 Update
Manzoni Federica
NEOMED College of Medicine
Rebuffi Chiara
Scotti Valeria
sonoelastography
Tinelli Carmine
-
Text
A resource consisting primarily of words for reading. Examples include books, letters, dissertations, poems, newspapers, articles, archives of mailing lists. Note that facsimiles or images of texts are still of the genre Text.
URL Address
<a href="http://doi.org/10.14366/usg.18053" target="_blank" rel="noreferrer noopener">http://doi.org/10.14366/usg.18053</a>
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Article information provided for research and reference use only. All rights are retained by the journal listed under publisher and/or the creator(s).
Pages
93-105
Issue
2
Volume
38
NEOMED College
NEOMED College of Medicine
NEOMED Department
Department of Radiology
Affiliated Hospital
Mercy Health St Elizabeth Boardman Hospital
Dublin Core
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Title
A name given to the resource
Future of breast elastography.
Publisher
An entity responsible for making the resource available
Ultrasonography (Seoul, Korea)
Date
A point or period of time associated with an event in the lifecycle of the resource
2019
2019-04
Subject
The topic of the resource
Strain; Breast; Shear wave; Breast neoplasms; *Elasticity Imaging Techniques; Strain ratio
Creator
An entity primarily responsible for making the resource
Barr Richard Gary
Description
An account of the resource
Both strain elastography and shear wave elastography have been shown to have high sensitivity and specificity for characterizing breast lesions as benign or malignant. Training is important for both strain and shear wave elastography. The unique feature of benign lesions measuring smaller on elastography than B-mode imaging and malignant lesions appearing larger on elastography is an important feature for characterization of breast masses. There are several artifacts which can contain diagnostic information or alert to technique problems. Both strain and shear wave elastography continue to have improvements and new techniques will soon be available for clinical use that may provide additional diagnostic information. This paper reviews the present state of breast elastography and discusses future techniques that are not yet in clinical practice.
Identifier
An unambiguous reference to the resource within a given context
<a href="http://doi.org/10.14366/usg.18053" target="_blank" rel="noreferrer noopener">10.14366/usg.18053</a>
*Elasticity Imaging Techniques
2019
Barr Richard Gary
breast
Breast Neoplasms
Department of Radiology
Korea)
Mercy Health St Elizabeth Boardman Hospital
NEOMED College of Medicine
Shear wave
strain
Strain ratio
Ultrasonography (Seoul
Ultrasonography (Seoul, Korea)
-
Text
A resource consisting primarily of words for reading. Examples include books, letters, dissertations, poems, newspapers, articles, archives of mailing lists. Note that facsimiles or images of texts are still of the genre Text.
URL Address
<a href="http://doi.org/10.1002/jum.15006" target="_blank" rel="noreferrer noopener">http://doi.org/10.1002/jum.15006</a>
Rights
Article information provided for research and reference use only. All rights are retained by the journal listed under publisher and/or the creator(s).
NEOMED Department
Department of Radiology
Affiliated Hospital
Mercy Health St Elizabeth Boardman Hospital
Dublin Core
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Title
A name given to the resource
Use of a Real-Time Stress Map for Assessment of Applied Stress for Strain Elastography-Utility in Training and Computation of Strain Ratios.
Publisher
An entity responsible for making the resource available
Journal of ultrasound in medicine : official journal of the American Institute of Ultrasound in Medicine
Date
A point or period of time associated with an event in the lifecycle of the resource
2019
2019-04
Subject
The topic of the resource
Training; strain elastography; Strain ratio; strain index
Creator
An entity primarily responsible for making the resource
Barr Richard G; Nikolov Svetoslav Ivanov
Description
An account of the resource
OBJECTIVES: There is a significant learning curve in strain elastography. Uniform appropriate levels of stress must be applied for accurate elastograms. If the stress is not applied appropriately, inaccurate results will be obtained, particularly when strain ratios are being estimated. This paper describes a new technique which allows the real-time visualization of the applied stress with a color-coded stress map. The potential use of this map is discussed. METHODS: Ten patients (5 breast, 5 thyroid) and phantoms were scanned using the stress map. The stress applied was varied and the resultant change in the strain image evaluated. RESULTS: The stress map was able to document if appropriate stress was applied when performing strain elastography. When inappropriate stress was applied or physiological process effected the strain image the stress map demonstrated the areas of inaccurate measurements in the stress map. CONCLUSIONS: The display of a stress map that depicts the degree and uniformity of applied stress would be helpful both for training of the appropriate technique, for confirming that the elastogram is appropriate for evaluation, and that strain ratio estimates are accurate.
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<a href="http://doi.org/10.1002/jum.15006" target="_blank" rel="noreferrer noopener">10.1002/jum.15006</a>
2019
Barr Richard G
Department of Radiology
Journal of ultrasound in medicine : official journal of the American Institute of Ultrasound in Medicine
Mercy Health St Elizabeth Boardman Hospital
NEOMED College of Medicine
Nikolov Svetoslav Ivanov
Strain elastography
strain index
Strain ratio
Training
-
Text
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<a href="http://doi.org/10.1055/s-0043-124184" target="_blank" rel="noreferrer noopener">http://doi.org/10.1055/s-0043-124184</a>
Pages
64–75
Issue
1
Volume
40
NEOMED College
NEOMED College of Medicine
NEOMED Department
Department of Radiology
Affiliated Hospital
Mercy Health St Elizabeth Boardman Hospital
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Evaluation of Inter-System Variability in Liver Stiffness Measurements.
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Ultraschall in der Medizin (Stuttgart, Germany : 1980)
Date
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2019
2019-02
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Ferraioli Giovanna; De Silvestri Annalisa; Lissandrin Raffaella; Maiocchi Laura; Tinelli Carmine; Filice Carlo; Barr Richard G
Description
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AIM: The primary aim of this study was to determine the inter-system variability of liver stiffness measurements (LSMs) in patients with varying degrees of liver stiffness. The secondary aim was to determine the inter-observer variability of measurements. MATERIALS AND METHODS: 21 individuals affected by chronic hepatitis C and 5 healthy individuals were prospectively enrolled. The assessment of LSMs was performed using six ultrasound (US) systems, four of which with point shear wave elastography (p-SWE) and two with 2 D shear wave elastography (2D-SWE) systems. The Fibroscan (Echosens, France) was used as the reference standard. Four observers performed the measurements in pairs (A-B, C-D). The agreement between different observers or methods was calculated using Lin's concordance correlation coefficient. The Bland-Altman limits of agreement (LOA) were calculated as well. RESULTS: There was agreement above 0.80 for all pairs of systems. The mean difference between the values of the systems with 2D-SWE technique was 1.54 kPa, whereas the maximum mean difference between the values of three out of four systems with the pSWE technique was 0.79 kPa. The intra-patient concordance for all systems was 0.89 (95 % CI: 0.83 - 0.94). Inter-observer agreement was 0.96 (95 % CI: 0.94 - 0.98) for the pair of observers A-B and 0.93 (95 % CI: 0.89 - 0.96) for the pair of observers C-D. CONCLUSION: The results of this study show that the agreement between LSMs performed with different US systems is good to excellent and the overall inter-observer agreement in "ideal conditions" is above 0.90 in expert hands.
Identifier
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<a href="http://doi.org/10.1055/s-0043-124184" target="_blank" rel="noreferrer noopener">10.1055/s-0043-124184</a>
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Article information provided for research and reference use only. All rights are retained by the journal listed under publisher and/or the creator(s).
2019
Barr Richard G
De Silvestri Annalisa
Department of Radiology
Ferraioli Giovanna
Filice Carlo
Germany : 1980)
Lissandrin Raffaella
Maiocchi Laura
Mercy Health St Elizabeth Boardman Hospital
NEOMED College of Medicine
Tinelli Carmine
Ultraschall in der Medizin (Stuttgart
Ultraschall in der Medizin (Stuttgart, Germany : 1980)