6,260 results match your criteria shear wave


CNN-Based Image Reconstruction Method for Ultrafast Ultrasound Imaging.

IEEE Trans Ultrason Ferroelectr Freq Control 2021 Nov 30;PP. Epub 2021 Nov 30.

Ultrafast ultrasound (US) revolutionized biomedical imaging with its capability of acquiring full-view frames at over 1 kHz, unlocking breakthrough modalities such as shear-wave elastography and functional US neuroimaging. Yet, it suffers from strong diffraction artifacts, mainly caused by grating lobes, side lobes, or edge waves. Multiple acquisitions are typically required to obtain a sufficient image quality, at the cost of a reduced frame rate. Read More

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November 2021

Effects of vibration and passive resting on muscle stiffness and restitution after submaximal exercise analyzed by elastography.

Acta Bioeng Biomech 2021 ;23(2):3-11

Research and Development Department of Vitberg, Nowy Sącz, Poland.

Purpose: The research aimed to assess the influence of vibration therapy on acceleration of muscles regeneration process after physical effort. Verification of the pace of motor capabilities recovery in fatigued muscles was performed with the use of the measurement method applying shear-wave elastography. It took into account an alteration in muscle stiffness affected by created passive stresses and accompanying deformations connected with muscles work above their resting length. Read More

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January 2021

Evaluation of the relationship between placental stiffness measured by shear wave elastography and perinatal outcomes in women with gestational diabetes mellitus.

Acta Radiol 2021 Nov 29:2841851211054255. Epub 2021 Nov 29.

Department of Obstetrics and Gynecology, Division of Perinatology, Ministry of Health, 536164Ankara City Hospital, Ankara, Turkey.

Background: Recently, studies on placental elastography in high-risk pregnancies continue to increase. The shear wave technique can contribute to the management of gestational diabetes mellitus (GDM) and improve perinatal outcomes by measuring placental stiffness. To evaluate the relationship between placental stiffness measured by shear wave elastography (SWE) and perinatal outcomes in women with GDM. Read More

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November 2021

Intracompartmental pressure in lower leg muscles and tibial nerve in healthy volunteers correlate to the stiffness measured using shear wave elastography.

Clin Biomech (Bristol, Avon) 2021 Nov 22;91:105539. Epub 2021 Nov 22.

Department of Biomedical Engineering and Chemical Engineering, The University of Texas at San Antonio, San Antonio, TX, USA. Electronic address:

Background: Acute compartment syndrome in the lower leg is a painful condition characterized by an increase in intracompartmental pressure. To prevent misdiagnosis and delay in the recognition of the condition, which can lead to severe complications, continuous monitoring of intracompartmental pressure for at least 24 h. from the onset of initial symptoms has been recommended. Read More

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November 2021

Application of a shear-wave elastography prediction model to distinguish between benign and malignant breast lesions and the adjustment of ultrasound Breast Imaging Reporting and Data System classifications.

Clin Radiol 2021 Nov 23. Epub 2021 Nov 23.

Ultrasound Department, Fujian Medical University Union Hospital, Fuzhou, China. Electronic address:

Aim: To explore a real-time shear-wave elastography (SWE) prediction model distinguishing benign from malignant breast lesions and to determine its application in adjusting ultrasound Breast Imaging Reporting and Data System (BI-RADS) classifications.

Materials And Methods: Four hundred and sixty-eight patients with 488 breast lesions were enrolled. Patients underwent hollow-needle puncture or surgical resection for histopathological examinations. Read More

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November 2021

Influence of Magnetostriction Induced by the Periodic Permanent Magnet Electromagnetic Acoustic Transducer (PPM EMAT) on Steel.

Sensors (Basel) 2021 Nov 19;21(22). Epub 2021 Nov 19.

Department of Mechanical and Industrial Engineering, University of Toronto, 5 King's College Road, Toronto, ON M5S 3G8, Canada.

The periodic permanent magnet electromagnetic acoustic transducer (PPM EMAT) is a sensor that can generate and receive shear horizontal (SH) waves without direct contact with the inspected medium using the Lorentz mechanism. However, the PPM EMAT experiences high signal variance on ferromagnetic steel under specific conditions, such as a change in signal amplitude when the sensor is moved in the direction of SH wave propagation. Magnetostriction effects are hypothesized to be the cause of these anomalous behaviors; the objective of this paper is to determine the relative strengths of the magnetostriction and Lorentz wave generation mechanisms for this type of EMAT on steel. Read More

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November 2021

Experimental Study on the Compaction Characteristics and Evaluation Method of Coarse-Grained Materials for Subgrade.

Materials (Basel) 2021 Nov 18;14(22). Epub 2021 Nov 18.

Railway Engineering Research Institute, China Academy of Rails Science, Beijing 100081, China.

Coarse-grained materials are widely used in high-speed railway construction, and it is of great significance to research its compaction characteristics due to the high quality control requirements. In this regard, a field compaction experiment was conducted at a subgrade near Bazhou Station of Beijing-Xiong'an Intercity Railway. The test results of the compaction effect were presented in this study at first. Read More

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November 2021

Determination of Relative Density and Degree of Saturation in Mineral Soils Based on In Situ Tests.

Materials (Basel) 2021 Nov 17;14(22). Epub 2021 Nov 17.

Department of Geotechnics, Institute of Civil Engineering, Warsaw University of Life Sciences, Nowoursynowska 159 St., 02-776 Warsaw, Poland.

Based on the results of dynamic probing (DP), time-domain reflectometry (TDR/MUX/MPTS), resistivity cone penetration tests (RCPT), Marchetti dilatometer tests (DMT), and seismic dilatometer tests (SDMT), it is possible to develop a relationship to calculate the relative density () and degree of saturation () of selected sandy soils. Compiled databases from documented research points for selected sandy soils were used to construct and develop direct correlations between the measured pressures and from DMT and shear wave velocity () from SDMT, along with pore water pressures () and atmospheric pressure (Pa). The results allowed us to make a preliminary prediction when evaluating the parameters. Read More

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November 2021

Neck Disability Index Is Better in Classification of Recovery after Whiplash Injury in Comparison with Ultrasound Shear Wave Elastography of Trapezius Muscle.

Diagnostics (Basel) 2021 Nov 10;11(11). Epub 2021 Nov 10.

Institute of Physical and Rehabilitation Medicine with Rheumatology, University Hospital Split, Šoltanska 1, 21000 Split, Croatia.

A prospective observational study comparing shear wave elastography (SWE) of trapezius muscle with Neck Disability Index (NDI) in a prediction model of health status six months after a whiplash injury. Both SWE values, measured by two radiologists, and NDI scores were obtained at baseline and after physical therapy (PT) (6-month period). Those values were compared with a 3-point Likert scale (no, partial or full recovery). Read More

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November 2021

Assessment of the Elastographic and Electromyographic of Pelvic Floor Muscles in Postmenopausal Women with Stress Urinary Incontinence Symptoms.

Diagnostics (Basel) 2021 Nov 5;11(11). Epub 2021 Nov 5.

Institute of Health Science, University of Opole, Katowicka 68, 45-060 Opole, Poland.

Background: Shear wave elastography is an effective method for studying the condition of various musculoskeletal soft tissues. The primary aim of this study was the objective elastographic and electromyographic assessment of the pelvic floor during the rest and contraction of the pelvic floor muscles (PFM) in postmenopausal women.

Methods: This was a prospective observational study that was carried out at the University Hospital in Wroclaw, Poland, between January 2017 and December 2019. Read More

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November 2021

Botulinum Toxin a Injection Combined with Radial Extracorporeal Shock Wave Therapy in Children with Spastic Cerebral Palsy: Shear Wave Sonoelastographic Findings in the Medial Gastrocnemius Muscle, Preliminary Study.

Children (Basel) 2021 Nov 17;8(11). Epub 2021 Nov 17.

Department of Rehabilitation Medicine, Comprehensive and Integrative Medicine Hospital, Daegu 42473, Korea.

Therapeutic strategies to boost the effect of botulinum toxin may lead to some advantages, such as long lasting effects, the injection of lower botulinum toxin dosages, fewer side effects, and lower costs. The aim of this study is to investigate the combined effect of botulinum toxin A (BTA) injection and extracorporeal shock wave therapy (ESWT) for the treatment of spasticity in children with spastic cerebral palsy (CP). Fifteen patients with spastic CP were recruited through a retrospective chart review to clarify what treatment they received. Read More

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November 2021

Acute Effects of Dermal Suction on Passive Muscle and Joint Stiffness.

Healthcare (Basel) 2021 Oct 31;9(11). Epub 2021 Oct 31.

Graduate School of Education, Hyogo University of Teacher Education, Kato 673-1494, Japan.

The aim of the present study was to examine the acute effects of dermal suction on the passive mechanical properties of specific muscles and joints. Dermal suction was applied to the calves of 24 subjects. Passive plantar flexion torque was measured with the right knee fully extended and the right ankle positioned at 20°, 10°, 0°, and -10° angles, where 0° represents the ankle neutral position, and positive values correspond to the plantar flexion angle. Read More

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October 2021

Machine Learning Evaluation of Biliary Atresia Patients to Predict Long-Term Outcome after the Kasai Procedure.

Bioengineering (Basel) 2021 Oct 22;8(11). Epub 2021 Oct 22.

Department of Advanced Biomedical Sciences, University of Naples "Federico II", 80131 Naples, Italy.

Kasai portoenterostomy (KP) represents the first-line treatment for biliary atresia (BA). The purpose was to compare the accuracy of quantitative parameters extracted from laboratory tests, US imaging, and MR imaging studies using machine learning (ML) algorithms to predict the long-term medical outcome in native liver survivor BA patients after KP. Twenty-four patients were evaluated according to clinical and laboratory data at initial evaluation (median follow-up = 9. Read More

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October 2021

Inflammatory activity affects the accuracy of liver stiffness measurement by transient elastography, but not by two-dimensional shear wave elastography in nonalcoholic fatty liver disease.

Liver Int 2021 Nov 25. Epub 2021 Nov 25.

Department of Visceral Surgery and Medicine, Inselspital, Bern University Hospital, University of Bern, Switzerland.

Background: In patients with non-alcoholic fatty liver disease (NAFLD), the impact of the severity of steatosis and inflammatory activity on the accuracy of liver stiffness measurement (LSM) by transient elastography (TE) and by two-dimensional-shear-wave elastography (2D-SWE) in staging liver fibrosis is still debated and scarce, respectively. We aimed to focus on this aspect.

Methods: We prospectively studied 104 patients requiring biopsy for the assessment of NAFLD. Read More

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November 2021

Spatial distribution of loose connective tissues on the anterior hip joint capsule: a combination of cadaveric and in-vivo study.

Sci Rep 2021 Nov 24;11(1):22813. Epub 2021 Nov 24.

Department of Clinical Anatomy, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, 1-5-45 Yushima, Bunkyo-ku, Tokyo, 113-8519, Japan.

Recently, pathological changes in the fat pad on the anterior inferior iliac spine (AIIS), between the proximal rectus femoris and joint capsule, have been highlighted as a cause of anterior hip pain. However, precise fat pad features, such as the spatial distribution distal to the AIIS, histological features, and in vivo tissue elasticity, remain unclear. This study aimed to investigate the morphological characteristics of the fat pad on the AIIS. Read More

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November 2021

Efficacy of shear wave elasticity for evaluating myocardial hypertrophy in hypertensive rats.

Sci Rep 2021 Nov 24;11(1):22812. Epub 2021 Nov 24.

Department of Cardiovascular Medicine, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, 2-5-1 Shikata-cho, Kita-ku, Okayama, 700-8558, Japan.

Shear wave (SW) imaging is a novel ultrasound-based technique for assessing tissue characteristics. SW elasticity may be useful to assess the severity of hypertensive left ventricular (LV) hypertrophy. This study aimed to evaluate the efficacy of SW elasticity for assessing the degree of myocardial hypertrophy using hypertensive rats. Read More

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November 2021

Microscopic multifrequency magnetic resonance elastography of ex vivo abdominal aortic aneurysms for extracellular matrix imaging in a mouse model.

Acta Biomater 2021 Nov 21. Epub 2021 Nov 21.

Institute for Medical Informatics, Charité - Universitätsmedizin Berlin, Berlin, Germany, corporate member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Hindenburgdamm 30, 12200 Berlin, Germany. Electronic address:

An abdominal aortic aneurysm (AAA) is a permanent dilatation of the abdominal aorta, usually accompanied by thrombus formation. The current clinical imaging modalities cannot reliably visualize the thrombus composition. Remodeling of the extracellular matrix (ECM) during AAA development leads to stiffness changes, providing a potential imaging marker. Read More

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November 2021

Liver stiffness and prediction of cardiac outcomes in patients with acute decompensated heart failure.

Clin Transplant 2021 Nov 24:e14545. Epub 2021 Nov 24.

Baylor Scott & White Research Institute, Baylor University Medical Center, Dallas, TX, USA.

Background: In acute decompensated heart failure (ADHF), noninvasive markers that predict morbidity and mortality are limited. Liver stiffness measurement (LSM) increases with hepatic fibrosis; however it may be falsely elevated in patients with ADHF in the absence of liver disease. We investigated whether elevated LSM predicts cardiac outcomes in ADHF. Read More

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November 2021

Quantitative evaluation of the Achilles tendon and supraspinatus tendon in end-stage kidney disease (ESKD) patients: A potential tool for predicting spontaneous tendon rupture.

Ther Apher Dial 2021 Nov 24. Epub 2021 Nov 24.

Department of Medical Ultrasound, West China Hospital of Sichuan University, Chengdu, China.

Introduction: Many cases of spontaneous tendon rupture in end-stage kidney disease (ESKD) patients have been reported worldwide. Quantitative assessment of tendon has become an important way to improve the prognosis of patients.

Methods: In the recruited healthy volunteers and ESKD patients, the thickness and shear wave velocity (SWV) of supraspinatus tendons and Achilles tendons were measured and compared among groups. Read More

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November 2021

Shear wave imaging and classification using extended Kalman filter and decision tree algorithm.

Math Biosci Eng 2021 Sep;18(6):7631-7647

Faculty of Electrical and Electronic Engineering, Phenikaa University, Hanoi 12116, Vietnam.

Shear wave ultrasound elastography is a quantitative imaging approach in soft tissues based on viscosity-elastic properties. Complex shear modulus (CSM) estimation is an effective solution to analyze tissues' physical properties for elasticity and viscosity based on the wavenumber and attenuation coefficient. CSM offers a way to detect and classify some types of soft tissues. Read More

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September 2021

Γ-profilometry: a new paradigm for precise optical metrology.

Opt Express 2021 Oct;29(22):36100-36110

We show that the shape of a surface can be unambiguously determined from investigating the coherence function of a wave-field reflected by the surface and without the requirement of a reference wave. Spatio-temporal sampling facilitates the identification of temporal shifts of the coherence function that correspond to finite height differences of the surface. Evaluating these finite differences allows for the reconstruction of the surface using a numerical integration procedure. Read More

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October 2021

Ultrasound Elastography for Hand Soft Tissue Assessment.

Hand Clin 2022 Feb;38(1):119-128

Mayo Clinic College of Medicine, 200 First Street, S.W, Rochester, MN 55905, USA.

Over the past decade, ultrasound elastography has emerged as a new technique for measuring soft tissue properties. Real-time, noninvasive, and quantitative evaluations of tissue stiffness have improved and aid in the assessment of normal and pathological conditions. Specifically, its use has substantially increased in the evaluation of muscle, tendon, and ligament properties. Read More

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February 2022

Sensitivity of the shear wave speed-stress relationship to soft tissue material properties and fiber alignment.

J Mech Behav Biomed Mater 2021 Nov 14;125:104964. Epub 2021 Nov 14.

Department of Mechanical Engineering, University of Wisconsin-Madison, Madison, WI, USA; Department of Orthopedics and Rehabilitation, University of Wisconsin-Madison, Madison, WI, USA. Electronic address:

The use of shear wave propagation to noninvasively measure material properties and loading in tendons and ligaments is a growing area of interest in biomechanics. Prior models and experiments suggest that shear wave speed primarily depends on the apparent shear modulus (i.e. Read More

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November 2021

Evaluation of renal fibrosis in patients with chronic kidney disease by shear wave elastography: a comparative analysis with pathological findings.

Abdom Radiol (NY) 2021 Nov 20. Epub 2021 Nov 20.

Department of Ultrasound, Fifth Affiliated Hospital of Sun Yat-Sen University, Zhuhai, 519000, Guangdong, China.

Purpose: To explore the elastic values obtained by shear wave elastography (SWE) in assessing renal fibrosis in chronic kidney disease (CKD).

Methods: One hundred and twenty-four patients with CKD who underwent renal biopsy were prospectively enrolled between April 2019 and June 2021. SWE was performed to measure the renal cortex stiffness, presented as SWE parameters, including the minimum, mean, and maximum elasticity (namely Emin, Emean, and Emax). Read More

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November 2021

Time-course changes in active stiffness of the supraspinatus muscle after arthroscopic rotator cuff repair.

J Med Ultrason (2001) 2021 Nov 19. Epub 2021 Nov 19.

Department of Orthopaedic Surgery, Hitsujigaoka Hospital, 3-1-10 Aoba-cho, Atsubetsu-ku, Sapporo, Hokkaido, 004-0021, Japan.

Purpose: This study aimed to investigate the time-course changes in the active stiffness of the supraspinatus muscle after arthroscopic rotator cuff repair.

Methods: Eight male patients (mean age 61.5 ± 9. Read More

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November 2021

Passive and active muscle elasticity of medial gastrocnemius is related to performance in sprinters.

Eur J Appl Physiol 2021 Nov 19. Epub 2021 Nov 19.

Graduate School of Health and Sports Science, Juntendo University, 1-1 Hiraka-gakuendai, Inzai, Chiba, 270-1695, Japan.

Purpose: Limited information is available on the association between muscle material properties and sprint performance. We aimed to identify whether and how the elasticity of passive and active muscle of the medial gastrocnemius (MG) is related to sprint performance.

Methods: MG shear wave speed was measured under passive and active (20%, 50%, 80% of maximal voluntary contraction [MVC]) conditions, with ultrasound shear wave elastography, in 18 male sprinters. Read More

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November 2021

Impact damping and vibration attenuation in nematic liquid crystal elastomers.

Nat Commun 2021 Nov 18;12(1):6676. Epub 2021 Nov 18.

Cavendish Laboratory, University of Cambridge, J.J. Thomson Avenue, Cambridge, CB3 0HE, UK.

Nematic liquid crystal elastomers (LCE) exhibit unique mechanical properties, placing them in a category distinct from other viscoelastic systems. One of their most celebrated properties is the 'soft elasticity', leading to a wide plateau of low, nearly-constant stress upon stretching, a characteristically slow stress relaxation, enhanced surface adhesion, and other remarkable effects. The dynamic soft response of LCE to shear deformations leads to the extremely large loss behaviour with the loss factor tanδ approaching unity over a wide temperature and frequency ranges, with clear implications for damping applications. Read More

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November 2021

Clinical utility of 3D magnetic resonance elastography in patients with biliary obstruction.

Eur Radiol 2021 Nov 17. Epub 2021 Nov 17.

Department of Neurosurgery, Shengjing Hospital, China Medical University, No. 36, Sanhao Street, Heping District, Shenyang, 110004, People's Republic of China.

Objectives: Three-dimensional magnetic resonance elastography (3D-MRE) allows for multiparametric modeling of both elastic and viscous tissue characteristics. Our aim was to compare 3D-MRE with conventional liver shear stiffness assessment in gauging obstructive jaundice (OJ), predicting the adequacy of biliary decompression after drainage, and discriminating OJ from liver fibrosis.

Methods: Patients with no histories of liver disease (n = 201) were studied in retrospect, grouped by bilirubin levels as no jaundice (NJ ≤ 2 mg/dL; n = 75), mild OJ (>2 mg/dL and ≤ 4 mg/dL; n = 56), and severe OJ (> 4 mg/dL; n = 70). Read More

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November 2021

Relationship of shear wave elastography anisotropy with tumor stem cells and epithelial-mesenchymal transition in breast cancer.

BMC Med Imaging 2021 Nov 17;21(1):171. Epub 2021 Nov 17.

Department of Ultrasound, Affiliated Tumor Hospital of Xinjiang Medical University, No. 789 Suzhou East Road, Xinshi District, Urumqi, 830011, People's Republic of China.

Background: This study is to examine the feasibility of shear wave elastography (SWE) anisotropy in assessing the prognosis of breast cancer.

Methods: We enrolled 119 breast cancer patients from January 2017 to October 2019. SWE was performed before operation. Read More

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November 2021