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ultrasound elastography

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https://www.readbyqxmd.com/read/28231589/ultrasound-elastography-in-diffuse-and-focal-parotid-gland-lesions
#1
Naglaa Mansour, Benedikt Hofauer, Andreas Knopf
In Europe, ultrasound (US) is the diagnostic gold standard for the visualisation of parotid gland disorders. While high-resolution B-mode US reliably visualises focal lesions, its diagnostic capacity to distinguish tumour entities or to characterise diffuse lesions remains poor. Strain elastography (SE) and shear wave elastography (SWE) are novel imaging techniques that provide additional information about tissue elasticity. SE analyses the strain or displacement in response to force or compression and, therefore, shows the relative tissue elasticity within a selected region of interest (ROI)...
2017: ORL; Journal for Oto-rhino-laryngology and its related Specialties
https://www.readbyqxmd.com/read/28227118/shear-wave-elastography-using-wigner-ville-distribution-a-simulated-multilayer-media-study
#2
Pooya Sobhe Bidari, Javad Alirezaie, Jahan Tavakkoli, Pooya Sobhe Bidari, Javad Alirezaie, Jahan Tavakkoli, Javad Alirezaie, Jahan Tavakkoli
Shear Wave Elastography (SWE) is a quantitative ultrasound-based imaging modality for distinguishing normal and abnormal tissue types by estimating the local viscoelastic properties of the tissue. These properties have been estimated in many studies by propagating ultrasound shear wave within the tissue and estimating parameters such as speed of wave. Vast majority of the proposed techniques are based on the cross-correlation of consecutive ultrasound images. In this study, we propose a new method of wave detection based on time-frequency (TF) analysis of the ultrasound signal...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28227015/a-comparison-of-multimodal-biomarkers-for-chronic-hepatitis-b-assessment-using-recursive-feature-elimination
#3
Yanru Bai, Xin Chen, Changfeng Dong, Yingxia Liu, Zhiguo Zhang, Yanru Bai, Xin Chen, Changfeng Dong, Yingxia Liu, Zhiguo Zhang, Xin Chen, Changfeng Dong, Zhiguo Zhang, Yanru Bai, Yingxia Liu
An effective assessment of liver fibrosis in patients with chronic hepatitis B (CHB) is highly desired because it is important not only for clinical courses prediction, but also for the determination of antiviral therapy schemes. In recent years, various approaches for liver biopsies analysis have been highlighted, such as elastography techniques and serum markers, due to their properties of non-invasiveness. The aim of this study is to determine the best biomarkers or their combination by comparing multimodal biomarkers (ultrasound elastography parameters, biochemical hematologic parameters, and clinical parameters) for fibrosis assessment in chronic hepatitis B using a support vector machine combined with recursive feature elimination (RFE-SVM) approach...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28223101/non-invasive-evaluation-of-portal-hypertension-using-ultrasound-elastography
#4
REVIEW
Annalisa Berzigotti
Portal hypertension (PH) leads to serious complications such as bleeding from gastro-esophageal varices, ascites and porto-systemic encephalopathy in patients with chronic liver disease (CLD). Since the gold-standard methods for assessing PH and its complications (measurement of hepatic venous pressure gradient, HVPG; endoscopy), are invasive expensive and not available at all centers, non-invasive methods have been increasingly investigated in the last 20 years. The present review focuses on the role of ultrasound elastography, a novel group of non-invasive techniques able to measure stiffness in target organs, to identify the presence, severity and risk of complications of PH...
February 13, 2017: Journal of Hepatology
https://www.readbyqxmd.com/read/28218798/shear-wave-elastography-imaging-for-the-features-of-symptomatic-carotid-plaques-a-feasibility-study
#5
Zhe Lou, Jun Yang, Li Tang, Youhe Jin, Jinsong Zhang, Chao Liu, Qiaobei Li
OBJECTIVES: Shear wave elastography (SWE) was performed to evaluate the Young's modulus of carotid plaques in patients presenting with cerebrovascular incidents, to estimate the clinical value and feasibility of this approach. METHODS: Sixty-one patients (mean age, 65 years; 45 men) underwent common duplex ultrasonic examination and SWE evaluation. The patients were divided into the symptomatic and asymptomatic groups based on the presence of unilateral focal neurological symptoms...
February 20, 2017: Journal of Ultrasound in Medicine: Official Journal of the American Institute of Ultrasound in Medicine
https://www.readbyqxmd.com/read/28218484/vibrational-analysis-of-implants-and-tissues-calibration-and-mechanical-spectroscopy-of-multi-component-materials
#6
Ruchit G Shah, Dale DeVore, Mark C Pierce, Frederick H Silver
Several new methods have been used to non-destructively evaluate the mechanical properties of materials and tissues including magnetic resonance elastography (MRE), ultrasound elastography (UE), optical coherence elastography (OCE) and various forms of vibrational analysis. One of the limitations of using these methods is the need to establish a relationship between the modulus measured using each new technique and moduli measured using well-established techniques such as constant rate-of-strain and incremental stress-strain curves...
February 20, 2017: Journal of Biomedical Materials Research. Part A
https://www.readbyqxmd.com/read/28218202/contrast-enhanced-endoscopic-ultrasound-and-endoscopic-ultrasound-elastography-in-gastrointestinal-stromal-tumors
#7
Andre Ignee, Christian Jenssen, Michael Hocke, Yi Dong, Wen-Ping Wang, Xin-Wu Cui, Matthias Woenckhaus, Sevastita Iordache, Adrian Saftoiu, Gudrun Schuessler, Christoph F Dietrich
BACKGROUND AND OBJECTIVES: Gastrointestinal stromal tumors (GISTs) represent the largest group of subepithelial tumors (SET) of the upper gastrointestinal (GI) tract. They may show malignant behavior, in contrast to other SET. Endoscopic ultrasound (EUS) is frequently used to characterize SET. With the introduction of contrast-enhanced ultrasound (CEUS) into EUS (CE-EUS), distinct enhancement patterns can be detected. In the presented study, the characteristic features of CE-EUS in GIST are analyzed and compared with those of other SET...
January 2017: Endoscopic Ultrasound
https://www.readbyqxmd.com/read/28218199/contrast-harmonic-endoscopic-ultrasound-instrumentation-echoprocessors-and-echoendoscopes
#8
REVIEW
Julio Iglesias-Garcia, Jose Lariño-Noia, J Enrique Domínguez-Muñoz
Endoscopic ultrasound (EUS) has become as one the best diagnostic and therapeutic methods for the management of several intraintestinal and extraintestinal diseases, among them to highlight pancreaticobiliary indications, mediastinal evaluation, and the analysis of gastrointestinal lesions. Over the years, there has been an enormous evolution in the systems available to perform EUS. Newer processors and echoendoscopes are available nowadays, with the ability to perform new imaging analysis, such as elastography and contrast enhancement...
January 2017: Endoscopic Ultrasound
https://www.readbyqxmd.com/read/28218194/role-of-contrast-enhanced-endoscopic-ultrasound-in-lymph-nodes
#9
REVIEW
Michael Hocke, Andre Ignee, Christoph Dietrich
Diagnosing unclear lymph node (LN) enlargements in the mediastinum and abdomen is the most important indication of endoscopic ultrasound (EUS)-fine needle aspiration (FNA) after the diagnosis and treatment of pancreatic diseases. Investigating LNs in these areas can happen in different clinical settings. Mostly, it is the first modality in general LN diseases without any peripheral LN enlargements. On the other hand, it can be the question of LN involvement in a known or suspected primary tumor. Due to EUS-FNA cytology, those questions can be answered highly, accurately...
January 2017: Endoscopic Ultrasound
https://www.readbyqxmd.com/read/28213851/-sonoelastography-in-daily-clinical-routine
#10
J Rübenthaler, K Müller-Peltzer, M Reiser, D Rjosk-Dendorfer, D-A Clevert
CLINICAL ISSUE: In the daily clinical routine characterization of focal lesions using native B‑mode classical ultrasound and color Doppler can be difficult or insufficient; therefore, additional diagnostic information must be taken into consideration. STANDARD RADIOLOGICAL METHODS: Standard radiological methods in the daily clinical routine include native B‑mode ultrasound and color Doppler ultrasound. METHODICAL INNOVATIONS: Using sonoelastography it is possible to evaluate and characterize tissue properties and focal lesions regarding their stiffness to acquire additional information on a noninvasive basis...
February 17, 2017: Der Radiologe
https://www.readbyqxmd.com/read/28211807/two-dimensional-shear-wave-elastography-of-breast-lesions-comparison-of-two-different-systems
#11
Wei-Wei Ren, Xiao-Long Li, Ya-Ping He, Dan-Dan Li, Dan Wang, Chong-Ke Zhao, Xiao-Wan Bo, Bo-Ji Liu, Wen-Wen Yue, Hui-Xiong Xu
OBJECTIVE: To evaluate the diagnostic performance of two different shear wave elastography (SWE) techniques in distinguishing malignant breast lesions from benign ones. MATERIALS AND METHODS: From March 2016 to May 2016, a total of 153 breast lesions (mean diameter, 16.8 mm±10.5; range 4.1-90.0 mm) in 153 patients (mean age, 46.4 years±15.1; age range 20-86 years) were separately performed by two different SWE techniques (i.e. T-SWE, Aplio500, Toshiba Medical System, Tochigi, Japan; and S-SWE, the Aixplorer US system, SuperSonic Imagine, Provence, France)...
February 17, 2017: Clinical Hemorheology and Microcirculation
https://www.readbyqxmd.com/read/28211804/comparison-of-elastography-based-on-transvaginal-ultrasound-and-mri-in-assessing-parametrial-invasion-of-cervical-cancer
#12
Xi Ma, Qi Li, Jian-Liang Wang, Jun Shao, Yu-Chun Zhu, Wei Ding, Hou-Sheng Zhang, Hong-Yan Wang, Jun-Kang Shen
OBJECTIVE: The purpose of this study was to evaluate the clinical value of transvaginal elastography (TVES) combined with high-resolution transvaginal ultrasound (TVS) in the detection of parametrial invasion in cervical cancer and to compare the diagnostic performance with magnetic resonance imaging (MRI). MATERIALS AND METHODS: 52 women with histologically confirmed cervical cancer over a 2-year period were staged using International Federation of Gynecology and Obstetrics (FIGO) criteria and underwent MRI and TVES combined with TVS according to a standardized protocol before treatment...
February 17, 2017: Clinical Hemorheology and Microcirculation
https://www.readbyqxmd.com/read/28194993/preoperative-prediction-of-papillary-thyroid-microcarcinoma-via-multiparameter-ultrasound
#13
Hui Juan Ma, Jing Chun Yang, Zhen Peng Leng, Ying Chang, Hua Kang, Liang Hong Teng
Background Accurate diagnosis of papillary thyroid microcarcinoma (PTMC) is important for further management. Ultrasound (US) is the most frequently used imaging modality for PTMC. Purpose To evaluate the diagnostic value of conventional US, contrast-enhanced ultrasound (CEUS) and real-time elastography (RTE) for patients with PTMC. Material and Methods In total, 135 patients with subcentimeter thyroid nodules who underwent conventional US, CEUS, and RTE before surgery were enrolled. A multivariate logistic regression analysis was performed to assess the independent predictors of PTMC...
January 1, 2017: Acta Radiologica
https://www.readbyqxmd.com/read/28187927/value-of-shear-wave-elastography-in-the-diagnosis-of-gouty-and-non-gouty-arthritis
#14
Yuanjiao Tang, Feng Yan, Yujia Yang, Xi Xiang, Liyun Wang, Lingyan Zhang, Li Qiu
Our aim was to analyze the diagnostic performance of shear wave elastography (SWE) in the diagnosis of gouty arthritis (GA) and non-gouty arthritis (non-GA). Thirty-nine patients in the GA group and 55 patients in the non-GA group were included in the study. Based on the echo intensity of the joint lesions, the GA group was subdivided into hypo-echoic GA, slightly hyper-echoic GA and hyper-echoic GA subgroups. Quantitative SWE features were evaluated and receiver operating characteristic analysis was performed...
February 7, 2017: Ultrasound in Medicine & Biology
https://www.readbyqxmd.com/read/28185694/role-of-bowel-ultrasound-in-the-diagnosis-and-follow-up-of-patients-with-crohn-s-disease
#15
REVIEW
Clara Benedetta Conti, Mariangela Giunta, Daniele Gridavilla, Dario Conte, Mirella Fraquelli
Crohn's disease (CD) is an inflammatory chronic bowel disorder; it can involve the whole gastrointestinal tract, but its localization in the ileum or colon is most common. The reference standard for the diagnosis of CD is ileocolonoscopy with histologic assessment. The reference standard for the detection of any complications is surgery. However, imaging techniques have an important role both in the detection/localization of CD and in the follow-up of CD patients. In the last few years, the technical development of ultrasound equipment, the advent of new technologies such as elastography and mostly the increased expertise of sonographers have boosted the role of bowel ultrasound in assessment of the gastrointestinal tract...
February 6, 2017: Ultrasound in Medicine & Biology
https://www.readbyqxmd.com/read/28180203/the-efsumb-website-a-great-source-for-ultrasound-information-and-education
#16
Christoph F Dietrich, Lynne Rudd, Adrian Saftiou, Odd Helge Gilja
The aim of this updated EFSUMB-website guide is to introduce readers to EFSUMB's wide ranging activities. The most recent are the guidelines on interventional ultrasound and intestinal ultrasound and updated CEUS Non-Liver and Elastography Liver Guidelines which can be freely downloaded. Hosting eBooks on our website is another new departure, most importantly the EFSUMB Course Book on Ultrasound available in a second edition as an eReader and an online Student Edition of the ECB. EFSUMB has been active with updating Guidelines; those mentioned above have all been revised or written in thelast two years...
January 31, 2017: Medical Ultrasonography
https://www.readbyqxmd.com/read/28180201/thyroid-ultrasound-state-of-the-art-part-1-thyroid-ultrasound-reporting-and-diffuse-thyroid-diseases
#17
REVIEW
Manjiri Dighe, Richard Barr, Jörg Bojunga, Vito Cantisani, Maria Cristina Chammas, David Cosgrove, Xin Wu Cui, Yi Dong, Franziska Fenner, Maija Radzina, Sudhir Vinayak, Jun Mei Xu, Christoph F Dietrich
Accurate differentiation of focal thyroid nodules (FTL) and thyroid abnormalities is pivotal for proper diagnostic and therapeutic work-up. In these two part articles, the role of ultrasound techniques in the characterization of FTL and evaluation of diffuse thyroid diseases is described to expand on the recently published World Federation in Ultrasound and Medicine (WFUMB) thyroid elastography guidelines and review how this guideline fits into a complete thyroid ultrasound exam.
January 31, 2017: Medical Ultrasonography
https://www.readbyqxmd.com/read/28180194/prospective-evaluation-of-quasistatic-ultrasound-elastography-use-compared-with-baseline-us-for-parotid-gland-lesions-preliminary-results-of-elasticity-contrast-index-eci-evaluation
#18
Vito Cantisani, Emanuele David, Armando De Virgilio, Paul S Sidhu, Hektor Grazhdani, Antonio Greco, Marco De Vincentiis, Alessandro Corsi, Flaminia De Cristofaro, Luca Brunese, Fabrizio Calliada, Alfredo Blandino, Mario Tombolini, Giorgio Ascenti, Roberto Stramare, Marcello Caratozzolo, Ferdinando D'Ambrosio
AIMS: To assess the diagnostic value of elasticity contrast index (ECI) elastography, in comparison with conventional ultrasound for the differentiation of benign and malignant parotid lesions. MATERIAL AND METHODS: Sixty-three consecutive patients with parotid gland tumors, treated surgically at a single tertiary center were enrolled. Ultrasound evaluation consisted of B-mode, color-Doppler and quasistatic ultrasound elastography (USE), conducted with the ECI technique...
January 31, 2017: Medical Ultrasonography
https://www.readbyqxmd.com/read/28177946/transient-elastography-evaluation-of-hepatic-and-spleen-stiffness-in-patients-with-hepatosplenic-schistosomiasis
#19
Zulane S T Veiga, Cristiane A Villela-Nogueira, Flávia F Fernandes, Marta G Cavalcanti, Fátima A Figueiredo, João L Pereira, Gustavo H Pereira, Henrique S Moraes Coelho, José M Peralta, Carlos E Marques, Renata M Perez, Homero S Fogaça
BACKGROUND: Hepatosplenic schistosomiasis (HES) has not been evaluated by transient elastography so far and its correlation with ultrasound variables remains to be defined. AIMS: The aim of this study was to describe the parameters of liver and spleen stiffness in HES assessed by transient elastography in comparison with cirrhotics and controls evaluating its correlation with ultrasonographic data. PATIENTS AND METHODS: HES, hepatitis C virus-cirrhotic, and control patients were included in this sectional study...
February 7, 2017: European Journal of Gastroenterology & Hepatology
https://www.readbyqxmd.com/read/28167187/reliability-of-assessment-of-upper-trapezius-morphology-its-mechanical-properties-and-blood-flow-in-female-patients-with-myofascial-pain-syndrome-using-ultrasonography
#20
Hakimeh Adigozali, Azadeh Shadmehr, Esmail Ebrahimi, Asghar Rezasoltani, Farrokh Naderi
OBJECTIVE: In the present study, the intra-rater reliability of upper trapezius morphology, its mechanical properties and intramuscular blood circulation in females with myofascial pain syndrome were assessed using ultrasonography. DESIGN: A total of 37 patients (31.05 ± 10 years old) participated in this study. Ultrasonography producer was set up in three stages: a) Gray-scale: to measure muscle thickness, size and area of trigger points; b) Ultrasound elastography: to measure muscle stiffness; and c) Doppler imaging: to assess blood flow indices...
January 2017: Journal of Bodywork and Movement Therapies
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