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Shear-wave elastography

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https://www.readbyqxmd.com/read/28442120/american-gastroenterological-association-institute-technical-review-on-the-role-of-elastography-in-chronic-liver-diseases
#1
Siddharth Singh, Andrew J Muir, Douglas T Dieterich, Yngve T Falck-Ytter
Chronic liver diseases (CLDs), due to chronic hepatitis C; hepatitis B; nonalcoholic fatty liver diseases (NAFLD); and alcoholic liver disease, are a leading cause of morbidity and mortality globally. Early identification of patients with cirrhosis at high risk of progression to liver-related complications may facilitate timely care and improve outcomes. With risks and misclassification associated with invasive tests, such as liver biopsy, noninvasive imaging modalities for liver fibrosis assessment have gained popularity...
May 2017: Gastroenterology
https://www.readbyqxmd.com/read/28440353/the-safety-and-feasibility-of-diagnostic-acoustic-radiation-force-impulse-elastography-used-for-eyes-a-preliminary-in-vivo-study
#2
Li Zha, Ke Qi Chen, Xiao Zhi Zheng, Jing Wu
AIMS: To assess the safety and feasibility of acoustic radiation force impulse (ARFI) elastography in the eyes of rats. Material and methods: One hundred and twenty-six SD rats were divided into 7 groups. Group 1 was the control group and Group 2 to Group 7 were investigated by ARFI elastography using increased powers of 5%, 10%, 20%, 50%, and 100% and repetitions of 5 or 10. The changes of ocular architecture structures and functions were examined by phthalmoscopic, histopathologic, and light reflex examination, and the expression level of IL-6, IL-8, and TNF-α was determined in days 1, 3, and 7 after ARFI elastography, respectively...
April 22, 2017: Medical Ultrasonography
https://www.readbyqxmd.com/read/28440347/performance-of-2d-swe-ge-for-predicting-different-stages-of-liver-fibrosis-using-transient-elastography-as-the-reference-method
#3
Felix Bende, Ioan Sporea, Roxana Sirli, Alina Popescu, Ruxandra Mare, Bogdan Miutescu, Raluca Lupusoru, Tudor Moga, Corina Pienar
AIM: To evaluate the performance of 2D shear-wave elastography from General Electric (2D-SWE.GE) for the noninvasiveassessment of liver fibrosis and to identify liver stiffness (LS) cut-off values for predicting different stages of fibrosisusing Transient Elastography (TE) as the reference method. MATERIAL AND METHOD: We included 331 consecutive subjectswith or without chronic hepatopathies in whom LS was evaluated in the same session by means of 2 elastographic techniques:TE and 2D-SWE...
April 22, 2017: Medical Ultrasonography
https://www.readbyqxmd.com/read/28435467/ultrasound-elastography-review-of-techniques-and-clinical-applications
#4
REVIEW
Rosa M S Sigrist, Joy Liau, Ahmed El Kaffas, Maria Cristina Chammas, Juergen K Willmann
Elastography-based imaging techniques have received substantial attention in recent years for non-invasive assessment of tissue mechanical properties. These techniques take advantage of changed soft tissue elasticity in various pathologies to yield qualitative and quantitative information that can be used for diagnostic purposes. Measurements are acquired in specialized imaging modes that can detect tissue stiffness in response to an applied mechanical force (compression or shear wave). Ultrasound-based methods are of particular interest due to its many inherent advantages, such as wide availability including at the bedside and relatively low cost...
2017: Theranostics
https://www.readbyqxmd.com/read/28431795/shear-wave-liver-elastography-with-a-propagation-map-diagnostic-performance-and-inter-observer-correlation-for-hepatic-fibrosis-in-chronic-hepatitis
#5
Eun Sun Lee, Jong Beum Lee, Hwi Ryong Park, Jeongin Yoo, Ji In Choi, Hyun Woong Lee, Hyung Joon Kim, Byung Ihn Choi, Hyun Jeong Park, Sung Bin Park
The aim of this study was to determine the performance of shear wave elastography (SWE) with a propagation map in the diagnosis of hepatic fibrosis, and to assess its reliability with transient elastography (TE) as the reference standard. Our prospective study included 115 consecutive patients with suspected or alleged chronic hepatitis. Patients underwent SWE by two different operators and TE by sonographers on the same day. The correlation coefficient of the intra-class correlation test between an experienced radiologist and a third-year radiology resident was 0...
April 18, 2017: Ultrasound in Medicine & Biology
https://www.readbyqxmd.com/read/28428826/the-reliability-of-shear-elastic-modulus-measurement-of-the-ankle-plantar-flexion-muscles-is-higher-at-dorsiflexed-position-of-the-ankle
#6
Junya Saeki, Tome Ikezoe, Masatoshi Nakamura, Satoru Nishishita, Noriaki Ichihashi
BACKGROUND: Excessive stiffness of lower limb muscles is associated with sports injuries. Therefore, the identification of a reliable measurement of the shear elastic modulus of various ankle plantar flexion muscles is required to evaluate lower leg sports injuries. This study investigated the reliable measurement of the shear elastic modulus of the ankle plantar flexion muscles at different ankle positions. METHODS: Twenty-three healthy young men (25.3 ± 3...
2017: Journal of Foot and Ankle Research
https://www.readbyqxmd.com/read/28426437/supersonic-transient-magnetic-resonance-elastography-for-quantitative-assessment-of-tissue-elasticity
#7
Yu Liu, Jingfei Liu, Brett Z Fite, Josquin Foiret, Asaf Ilovitsh, J Kent Leach, Erik Dumont, Charles F Caskey, Katherine W Ferrara
Non-invasive, quantitative methods to assess the properties of biological tissues are needed for many therapeutic and tissue engineering applications. Magnetic resonance elastography (MRE) has historically relied on external vibration to generate periodic shear waves. In order to focally assess a biomaterial or to monitor the response to ablative therapy, the interrogation of a specific region of interest by a focused beam is desirable and transient MRE (t-MRE) techniques have previously been developed to accomplish this goal...
April 20, 2017: Physics in Medicine and Biology
https://www.readbyqxmd.com/read/28424923/shear-wave-velocity-of-the-healthy-thyroid-gland-in-children-with-acoustic-radiation-force-impulse-elastography
#8
Meltem Ceyhan Bilgici, Dilek Sağlam, Semra Delibalta, Serap Yücel, Leman Tomak, Muzaffer Elmalı
PURPOSE: Acoustic radiation force impulse imaging is a kind of shear wave elastography that can be used in children for differentiating thyroid pathologies. Possible changes in the healthy thyroid gland in children may create difficulties in the use of shear wave velocities (SWV) in thyroid pathologies. The aim of this study was to define the normal values of SWV for the healthy thyroid gland in children, elucidate the correlation of the SWV values with potential influencing factors, and evaluate intra-operator reproducibility of the SWV...
April 19, 2017: Journal of Medical Ultrasonics
https://www.readbyqxmd.com/read/28417472/evaluation-of-liver-kidney-and-spleen-elasticity-in-healthy-newborns-and-infants-using-shear-wave-elastography
#9
Figen Bakirtas Palabiyik, Ercan Inci, Rustu Turkay, Derya Bas
OBJECTIVES: Elasticity measurements of tissues can be valuable in the diagnosis and management of various diseases. The aim of this study was to determine the elasticity values for normal liver, kidney, and spleen of healthy newborns and infants using shear wave elastography (SWE) imaging. METHODS: A total of 50 healthy term newborns and infants (19 girls and 31 boys; mean age 20.1 days, range 1 to 70 days) were examined by an experienced pediatric radiologist using SWE...
April 18, 2017: Journal of Ultrasound in Medicine: Official Journal of the American Institute of Ultrasound in Medicine
https://www.readbyqxmd.com/read/28414822/2-dimensional-shear-wave-elastography-interobserver-agreement-and-factors-related-to-interobserver-discrepancy
#10
Kibo Yoon, Woo Kyoung Jeong, Yongsoo Kim, Min Yeong Kim, Tae Yeob Kim, Joo Hyun Sohn
PURPOSE: To evaluate the interobserver reproducibility of two-dimensional shear wave elastography (2D-SWE) in measuring liver stiffness (LS) and to investigate factors related to liver 2D-SWE. MATERIALS AND METHODS: A prospective study was conducted between August 2011 and August 2012 in rheumatoid arthritis patients who had been treated with methotrexate. Interobserver reproducibility of 2D-SWE was evaluated, and the relationship between interobserver difference in LS and related factors was analyzed using linear regression analyses...
2017: PloS One
https://www.readbyqxmd.com/read/28408062/novel-method-for-vessel-cross-sectional-shear-wave-imaging
#11
Qiong He, Guo-Yang Li, Fu-Feng Lee, Qihao Zhang, Yanping Cao, Jianwen Luo
Many studies have investigated the applications of shear wave imaging (SWI) to vascular elastography, mainly on the longitudinal section of vessels. It is important to investigate SWI in the arterial cross section when evaluating anisotropy of the vessel wall or complete plaque composition. Here, we proposed a novel method based on the coordinate transformation and directional filter in the polar coordinate system to achieve vessel cross-sectional shear wave imaging. In particular, ultrasound radiofrequency data were transformed from the Cartesian to the polar coordinate system; the radial displacements were then estimated directly...
April 10, 2017: Ultrasound in Medicine & Biology
https://www.readbyqxmd.com/read/28407305/female-striated-urogenital-sphincter-contraction-measured-by-shear-wave-elastography-during-pelvic-floor-muscle-activation-proof-of-concept-and-validation
#12
Rafeef Aljuraifani, Ryan E Stafford, François Hug, Paul W Hodges
AIMS: Investigation of the function of the striated urogenital sphincter (SUS) is challenging because it is difficult to access and requires invasive measures. Ultrasound shear wave elastography (SWE) is a non-invasive real-time technique used to estimate tissue stiffness. As muscle stiffness can be used as an estimate of muscle force, SWE provides an opportunity to study contraction of the peri-urethral musculature. Validation of SWE to study SUS during functional tasks, such as pelvic floor muscle contractions, is required prior to application in clinical populations...
April 13, 2017: Neurourology and Urodynamics
https://www.readbyqxmd.com/read/28402836/reproducibility-and-diagnostic-performance-of-shear-wave-elastography-in-evaluating-breast-solid-mass
#13
Sun Hong, Ok Hee Woo, Hye Seon Shin, Soon-Young Hwang, Kyu Ran Cho, Bo Kyoung Seo
Shear wave elastography (SWE) was performed independently by two radiologists in 264 solid breast masses. The images were reviewed for color overlay pattern (COP) classification by the two radiologists, double blinded to any information. The interobserver agreement of the COP was almost perfect (κ=0.908) and high in Emax (ICC=0.89). The AUC value of the COP (0.954) was significantly higher than that of Emax (0.915) (p=0.002) but not significantly different from that of Emax combined with COP (0.957) (p=0.098)...
April 6, 2017: Clinical Imaging
https://www.readbyqxmd.com/read/28392000/swave-imaging-of-placental-elasticity-and-viscosity-proof-of-concept
#14
Jeffrey M Abeysekera, Manyou Ma, Mehran Pesteie, Jefferson Terry, Denise Pugash, Jennifer A Hutcheon, Chantal Mayer, Lutz Lampe, Septimiu Salcudean, Robert Rohling
The placenta is the interface between the fetus and the mother and is vital for fetal development. Ultrasound elastography provides a non-invasive way to examine in vivo the stiffness of the placenta; increased stiffness has previously been linked to fetal growth restriction. This study used a previously developed dynamic elastography method, called shear wave absolute vibro-elastography, to study 61 post-delivery clinically normal placentas. The shear wave speeds in the placenta were recorded under five different low-frequency mechanical excitations...
April 6, 2017: Ultrasound in Medicine & Biology
https://www.readbyqxmd.com/read/28382475/breast-adenoid-cystic-carcinoma-report-of-a-case-with-emphasis-on-routine-sonographic-findings-and-shear-wave-elastography
#15
Min Huang, Tian'an Jiang, Qiyu Zhao, Qihan You, Guo Tian, Baohua Wang
Adenoid cystic carcinoma (ACC) of the breast is a rare malignant tumor. Its sonographic characteristics have been described in some reports, but there are few such reports available that describe the sonoelastographic findings of this tumor and provide additional information about the nature of the lesion. In this case report, we describe the routine sonographic findings and shear wave elastography findings of a breast adenoid cystic carcinoma in a 53-year-old woman.
April 5, 2017: Journal of Medical Ultrasonics
https://www.readbyqxmd.com/read/28376114/high-risk-of-misinterpreting-liver-and-spleen-stiffness-using-2d-shear-wave-and-transient-elastography-after-a-moderate-or-high-calorie-meal
#16
Maria Kjærgaard, Maja Thiele, Christian Jansen, Bjørn Stæhr Madsen, Jan Görtzen, Christian Strassburg, Jonel Trebicka, Aleksander Krag
Food intake increases liver stiffness, but it is believed that liver stiffness returns to baseline two hours after a meal. The aim of this study was to investigate the impact of different sized meals on liver stiffness. Liver and spleen stiffness was measured with transient elastography (TE) and real-time 2-dimensional shear wave elastography (2D-SWE). Patients ingested a 625 kcal and a 1250 kcal liquid meal on two consecutive days. We measured liver and spleen elasticity, Controlled attenuation parameter (CAP) and portal flow at baseline and after 20, 40, 60, 120 and 180 minutes...
2017: PloS One
https://www.readbyqxmd.com/read/28370257/assessment-of-biopsy-proven-liver-fibrosis-by-2d-shear-wave-elastography-an-individual-patient-data-based-meta-analysis
#17
Eva Herrmann, Victor de Lédinghen, Christophe Cassinotto, Winnie C-W Chu, Vivian Y-F Leung, Giovanna Ferraioli, Carlo Filice, Laurent Castera, Valérie Vilgrain, Maxime Ronot, Jérôme Dumortier, Aymeric Guibal, Stanislas Pol, Jonel Trebicka, Christian Jansen, Christian Strassburg, Rongqin Zheng, Jian Zheng, Sven Francque, Thomas Vanwolleghem, Luisa Vonghia, Emanuel K Manesis, Pavlos Zoumpoulis, Ioan Sporea, Maja Thiele, Aleksander Krag, Claude Cohen-Bacrie, Aline Criton, Joel Gay, Thomas Deffieux, Mireen Friedrich-Rust
BACKGROUND AND AIMS: 2D shear wave elastography (2D-SWE) has proven to be efficient for the evaluation of liver fibrosis in small to moderate size clinical trials. We aimed at running a larger scale meta-analysis of individual data. METHODS: Centers which have worked with Aixplorer ultrasound equipment were contacted to share their data. Retrospective statistical analysis used direct and paired receiver operating characteristic (ROC) and area under the ROC curve (AUROC) analysis accounting for random effects...
March 31, 2017: Hepatology: Official Journal of the American Association for the Study of Liver Diseases
https://www.readbyqxmd.com/read/28370146/reproducibility-of-2-dimensional-shear-wave-elastography-assessment-of-the-liver-a-direct-comparison-with-point-shear-wave-elastography-in-healthy-volunteers
#18
Cheng Fang, Eleni Konstantatou, Odyssefs Romanos, Gibran T Yusuf, Daniel J Quinlan, Paul S Sidhu
OBJECTIVES: Two-dimensional shear wave elastography (2D-SWE) imaging for the noninvasive assessment of tissue stiffness was assessed for reproducibility in healthy volunteers in quantifying liver elasticity, compared with an established point shear wave elastography (p-SWE) technique also known as virtual touch quantification (VTQ) (SIEMENS). METHODS: Eleven healthy volunteers were examined by four experienced operators on two occasions, separated by two weeks (sessions A and B)...
April 3, 2017: Journal of Ultrasound in Medicine: Official Journal of the American Institute of Ultrasound in Medicine
https://www.readbyqxmd.com/read/28367603/mr-elastography-high-rate-of-technical-success-in-pediatric-and-young-adult-patients
#19
Madalsa Joshi, Jonathan R Dillman, Alexander J Towbin, Suraj D Serai, Andrew T Trout
BACKGROUND: Magnetic resonance (MR) elastography allows the noninvasive assessment of liver stiffness, which is a surrogate for fibrosis. OBJECTIVE: The purpose of this study was to describe our experience using liver MR elastography in a large pediatric population with attention to the frequency and causes of exam failure. MATERIALS AND METHODS: Imaging records were searched for patients ≤18 years of age who underwent 2-D gradient recalled echo (GRE) MR elastography of the liver between September 2011 and August 2015 on one of two 1...
April 3, 2017: Pediatric Radiology
https://www.readbyqxmd.com/read/28366710/ultrasound-shear-wave-elastography-a-novel-method-to-evaluate-bladder-pressure
#20
Renea M Sturm, Elizabeth B Yerkes, Jennifer L Nicholas, Devon Snow-Lisy, Dawn Diaz Saldano, P Lacy Gandor, Christopher G Halline, Ilina Rosoklija, Karen Rychlik, Emilie K Johnson, Earl Y Cheng
PURPOSE: Children with bladder dysfunction leading to increased storage pressure are at risk for renal deterioration. The current gold standard evaluation is urodynamics, an invasive test requiring catheterization. The aim of this study was to evaluate ultrasound shear wave elastography (SWE) as a novel means to assess bladder biomechanical properties associated with elevated bladder pressure. METHODS: Concurrent SWE and urodynamics were performed. Ultrasound SWE images were obtained of the anterior and posterior wall when empty, at 25, 50, 75, 100% expected bladder capacity (EBC) and end fill volume...
March 30, 2017: Journal of Urology
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