Read by QxMD icon Read

Shear wave elastography

Xueyi Zheng, Yini Huang, Yun Wang, Yubo Liu, Fei Li, Jing Han, Jianwei Wang, Longhui Cao, Jianhua Zhou
OBJECTIVES: To determine whether a combination of different types of elastography could improve the accuracy of elastography-aided downgrading ultrasound (US) Breast Imaging-Reporting and Data System (BI-RADS) category 4a lesions. MATERIALS AND METHODS: From January 2016 to May 2018, 458 consecutive women with 494 US BI-RADS category 4a breast lesions were enrolled in the prospective study. These lesions were subject to conventional US supplemented with strain elastography of elasticity imaging (EI), virtual touch tissue imaging (VTI), and shear wave elastography of virtual touch imaging quantification (VTIQ)...
December 4, 2018: Breast Cancer Research and Treatment
Jorge Racedo, Matthew W Urban
Shear wave elastography (SWE) is a noninvasive ultrasound imaging modality used in the assessment of the mechanical properties of tissues such as the liver, kidney, skeletal muscle, thyroid and the breast. Among the methods used to perform SWE is the comb-push ultrasound shear elastography (CUSE) method. This method uses multiple focused ultrasound beams to generate push beams with acoustic radiation force. Applying these push beams generates propagating shear waves. The propagation motion is measured with ultrafast ultrasound imaging...
November 30, 2018: IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control
Ying Wang, Jie-Ling Shan, Hu-Yan Chen, Zhi-Feng Wu
There is no established diagnostic criteria or widely accepted severity classification of localized scleroderma (LS) by imaging. Acoustic radiation force impulse (ARFI) technology by normalized mean shear wave velocity (SWV) may be as a probing tool for diagnosing and staging LS accurately and objectively. Fifty-six patients with LS of inflammatory (n = 21), sclerotic (n = 24) and atrophic (n = 11) stage and 30 healthy controls were evaluated on the basis of pathological results. Dermal thickness, ARFI quality (elastography score) and quantity (mean SWV) were measured by ultrasonography (US), diagnosis and stage performances of LS using the dermal thickness, elastography score and mean SWV compared with modified localized scleroderma skin severity index (mLoSSI) were evaluated...
December 3, 2018: Journal of Dermatology
Priscila Del Aguila da Silva, Ricardo Andrés Ramirez Uscategui, Victor José Correia Santos, Augusto Ryonosuke Taira, Renata Sitta Gomes Mariano, Mariana Garcia Kako Rodrigues, Ana Paula Rodrigues Simões, Marjury Cristina Maronezi, Michelle Lopes Avante, Frederico Ozanan Barros Monteiro, Wilter Ricardo Russiano Vicente, Marcus Antonio Rossi Feliciano
The aim of this study was to evaluate the stiffness of fetal lungs, liver, kidneys, and placentomes by acoustic radiation force impulse (ARFI) elastography in ovine and to correlate obtained findings with fetal development. Twenty-four ewes were included and tissue stiffness of fetal lung, liver, kidney, and placentome were measured beginning with 10th gestational week by qualitative-quantitative ARFI elastography. A total of 33 healthy lambs were born. Qualitative elastographic analysis permitted to classify maternal and fetal tissues elasticity in decreasing order as follows: placentome, kidney, liver, and lung...
November 29, 2018: Reproduction in Domestic Animals, Zuchthygiene
Weixi Jiang, Sirun Huang, Hua Teng, Peipei Wang, Meng Wu, Xia Zhou, Weiwei Xu, Qunxia Zhang, Haitao Ran
OBJECTIVES: To evaluate the stiffness of the tibial nerve with two-dimensional shear wave elastography (2D-SWE) and to determine whether 2D-SWE can be used to diagnose diabetic peripheral neuropathy (DPN). METHODS: The study included 70 consecutive diabetic patients with DPN or without DPN and 20 healthy volunteers. The tibial nerve stiffness measured with 2D-SWE was studied. The differences in stiffness values among patients with DPN, patients with clinically defined DPN, patients without DPN, and healthy volunteers based on clinical features and electrodiagnostic tests were evaluated with the Mann-Whitney U test and the Kruskal-Wallis test...
November 28, 2018: European Radiology
Ivica Grgurevic, Nermin Salkic, Tonci Bozin, Sanda Mustapic, Vladimir Matic, Ivo Dumic-Cule, Ida Tjesic Drinkovic, Tomislav Bokun
OBJECTIVES: To investigate diagnostic performance of point shear wave elastography by elastography point quantification (ElastPQ) for non-invasive assessment of liver fibrosis in patients with chronic liver diseases (CLD). METHODS: Liver stiffness measurement (LSM) by transient elastography (TE) and ElastPQ was performed in patients with CLD and healthy volunteers. The stage of liver fibrosis was defined by TE which served as the reference. We compared two methods by using correlation, area under the receiver operating characteristics curve (AUC) analysis, Bland and Altman plot and Passing-Bablok regression...
November 28, 2018: European Radiology
Davide Ippolito, Stefania Galimberti, Davide Leni, Francesco Vacirca, Ahmed Nasr, Nicola Luigi Bragazzi, Sara Spiga, Valentina Schiavone, Angela Ida Pincelli, Mattia Garancini, Biagio Eugenio Leone, Fabio Pagni
OBJECTIVES: The aim of this study was to evaluate the application of shear wave elastography (SWE) in the routine management of thyroid nodules, as a possible additional tool to the standard sonographic triage. METHODS: A total of 248 consecutive patients scheduled for ultrasound-guided thyroid fine-needle aspiration were included in the study. The presence of a pure colloid lesion was an exclusion criterion. Absolute and relative SWE stiffness measurements on color-coded elastograms, expressed in kilopascals and meters per second, were correlated with radiologic and pathologic features...
November 27, 2018: Journal of Ultrasound in Medicine: Official Journal of the American Institute of Ultrasound in Medicine
Zhen-Hua Zhu, Ke-Ping Peng, Ming-Hui Liu, Gui-Xiang Tian
OBJECTIVES: The aim of this study was to investigate whether the measurement of brain tissue stiffness using acoustic radiation force impulse (ARFI) elastography with virtual touch tissue quantification can improve the early detection of neonatal hypoxic-ischemic brain damage in rats. METHODS: Seven-day-old Sprague-Dawley rats were randomly assigned to 3 groups: the mild asphyxia (n = 30), moderate asphyxia (n = 30), and sham control (n = 10) groups...
November 27, 2018: Journal of Ultrasound in Medicine: Official Journal of the American Institute of Ultrasound in Medicine
Aniket N Tavare, Abdulrahman M Alfuraih, Elizabeth M A Hensor, Emmanouil Astrinakis, Harun Gupta, Philip Robinson
Purpose To examine if shear-wave elastography (SWE) improves the accuracy of diagnosing soft-tissue masses as benign or malignant compared with US alone or in combination with MRI. Materials and Methods Two hundred six consecutive adult participants (mean age, 57.7 years; range, 18-91 years), including 89 men (median age, 56.0 years; range, 21-91 years) and 117 women (median age, 59.1 years; range, 18-88 years), who were referred for biopsy of a soft-tissue mass were prospectively recruited from December 2015 through March 2017...
November 27, 2018: Radiology
Sanjay S Yengul, Paul E Barbone, Bruno Madore
Dispersion, or the frequency dependence of mechanical parameters, is a primary confounding factor in elastography comparisons. We present a study of dispersion in tissue-mimicking gels over a wide frequency band using a combination of ultrasound shear wave elastography (SWE), and a novel torsional vibration rheometry which allows independent mechanical measurement of SWE samples. Frequency-dependent complex shear modulus was measured in homogeneous gelatin hydrogels of two different bloom strengths while controlling for confounding factors such as temperature, water content and material aging...
November 22, 2018: Ultrasound in Medicine & Biology
Halit Nahit Şendur, Serap Gültekin, Leyla Salimli, Emetullah Cindil, Mahinur Cerit, Aylin Billur Şendur
OBJECTIVES: In this study, we aimed to determine reference values for normal breast and areolar skin elasticity using shear wave elastography. METHODS: The right breasts of 200 female participants were evaluated. The age, weight, body mass index, menopausal status, and parity number of all participants were noted. The elasticity values and thickness of the areolar skin and 4 quadrants of the breast skin of all participants were measured. To assess the reproducibility of shear wave elastography, a randomly selected subgroup of 35 participants was reevaluated by a second observer...
November 25, 2018: Journal of Ultrasound in Medicine: Official Journal of the American Institute of Ultrasound in Medicine
David Marlevi, Elira Maksuti, Matthew W Urban, Reidar Winter, Matilda Larsson
Ultrasound elastography has shown potential for improved plaque risk stratification. However, no clear consensus exists on what output metric to use, or what imaging parameters would render optimal plaque differentiation. For this reason we developed a combined ex vivo and in vitro setup, in which the ability to differentiate phantom plaques of varying stiffness was evaluated as a function of plaque geometry, push location, imaging plane, and analysed wave speed metric. The results indicate that group velocity or phase velocity  ⩾1 kHz showed the highest ability to significantly differentiate plaques of different stiffness, successfully classifying a majority of the 24 analysed plaque geometries, respectively...
November 23, 2018: Physics in Medicine and Biology
Matthew R Tangel, Ardeshir R Rastinehad
Many exciting advances in medical imaging have been made in recent years that will alter the way we diagnose, stage, and treat patients with prostate cancer. Multiparametric magnetic resonance imaging (MRI) is emerging as the main modality for prostate cancer imaging. Contrast-enhanced ultrasound and shear wave elastography may be strong alternatives in patients who cannot undergo MRI. Prostate-specific membrane antigen-directed positron emission tomography/computed tomography has proven to be valuable in the primary staging of high-risk disease and for detecting disease in patients with biochemical recurrence...
2018: F1000Research
Xiaoming Zhang, Boran Zhou, Wendaline M VanBuren, Tatnai L Burnett, John M Knudsen
The purpose of this research was to determine the feasibility of a transvaginal ultrasound vibro-elastography (TUVE) technique for generating and measuring shear wave propagation in the uterus. In TUVE, a 0.1-s harmonic vibration at a low frequency is generated on the abdomen of a subject via a handheld vibrator. A transvaginal ultrasound probe is used to measure the resulting shear wave propagation in the uterus. TUVE was evaluated on a female ultrasound phantom. The shear wave speeds in the region of interest of the uterus of the female ultrasound phantom were measured in the frequency range of 100-300 Hz...
November 19, 2018: Ultrasound in Medicine & Biology
Y N Feng, Y P Li, C L Liu, Z J Zhang
The purposes of this study were to compare Young's modulus values determined by shear wave ultrasound elastography (SWUE) with stiffness index obtained using a hand-held MyotonPRO device on the resting stiffness of gastrocnemius muscle belly and Achilles tendon; and to examine the test-retest reliability of those stiffness measurement using hand-held MyotonPRO. Twenty healthy volunteers participated in the study. The measurement values of muscle and tendon was determined in dominant legs. Each marker point was assessed using MyotonPRO and SWUE, respectively...
November 20, 2018: Scientific Reports
Murtadha Al-Khabori, Shahina Daar, Said A Al-Busafi, Humoud Al-Dhuhli, AlGhalya A Alumairi, Moez Hassan, Sara Al-Rahbi, Umaima Al-Ajmi
OBJECTIVES: This study aimed to estimate the prevalence of liver fibrosis and assess the risk factors for developing significant liver fibrosis in patients with Thalassemia Major (TM). METHODS: All patients with TM over the age of 10 years were included in the study. RESULTS: A total of 94 eligible patients underwent 2-D SWE. The median age was 26.7 years. The median of the average 5-year serum ferritin (5yrSF) and liver iron concentration (LIC) assessed by MRI T2* were 1326 µg/L and 6...
December 2019: Hematology (Amsterdam, Netherlands)
Kentaro Chino, Lilian Lacourpaille, Jun Sasahara, Yasuhiro Suzuki, François Hug
BACKGROUND: The plantar fascia is exposed to repetitive tensile stress induced by cyclic loads associated with daily activities, such as walking and running. Due to overuse or abnormal foot alignment, insertional and distal (i.e., mid-substance) regions within the plantar fascia may exhibit microtears, which leads to plantar fasciopathy. Ultrasound shear wave elastography is an imaging technique to measure shear wave velocity propagating through biological tissues, considered herein as an index of tensile stress...
November 8, 2018: Clinical Biomechanics
Romeo-Gabriel Mihăilă
INTRODUCTION: The severity of liver fibrosis can be assessed noninvasively today by liver stiffness measurements. Vibration-controlled transient elastography, shear wave elastography or magnetic resonance elastography are techniques increasingly used for this purpose. METHODS: This article presents the recent advances in the use of new techniques for liver fibrosis assessment in chronic hepatitis C: the correlation between liver stiffness values and liver fibrosis estimated by liver biopsies, the prognosis role of liver stiffness values, their usefulness in monitoring the treatment response, in assessing the severity of portal hypertension and in estimating the presence of esophageal varices...
November 15, 2018: Romanian Journal of Internal Medicine, Revue Roumaine de Médecine Interne
Joelma Carvalho Santos, Andrea Dória Batista, Carla Maria Mola Vasconcelos, Roberto Souza Lemos, Valter Romão de Souza Junior, Alain Dessein, Hélia Dessein, Silvia Maria Lucena Montenegro, Edmundo Pessoa Almeida Lopes, Ana Lúcia Coutinho Domingues
BACKGROUND: ARFI elastrography has been used as a noninvasive method to assess the severity of liver fibrosis in viral hepatitis, although with few studies in schistosomiasis mansoni. We aimed to evaluate the performance of point shear wave elastography (pSWE) for predicting significant periportal fibrosis (PPF) in schistosomotic patients and to determine its best cutoff point. METHODOLOGY/PRINCIPAL FINDINGS: This cross-sectional study included 358 adult schistosomotic patients subjected to US and pSWE on the right lobe...
November 16, 2018: PLoS Neglected Tropical Diseases
Christian A Hudert, Heiko Tzschätzsch, Birgit Rudolph, Hendrik Bläker, Christoph Loddenkemper, Hans-Peter Müller, Stephan Henning, Philip Bufler, Bernd Hamm, Jürgen Braun, Hermann-Georg Holzhütter, Susanna Wiegand, Ingolf Sack, Jing Guo
OBJECTIVES: Today, nonalcoholic fatty liver disease (NAFLD) is the most common chronic liver disease in children and adults alike. Yet, the noninvasive evaluation of disease severity remains a diagnostic challenge. In this study, we apply multifrequency magnetic resonance elastography (mMRE) for the quantification of liver steatosis and fibrosis in adolescents with NAFLD. METHODS: Fifty adolescents (age range, 10-17 years; mean BMI, 33.9 kg/m; range, 21.4-42.1 kg/m) with biopsy-proven NAFLD were included in this prospective study...
November 15, 2018: Investigative Radiology
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"