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ultrasound elastography

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https://www.readbyqxmd.com/read/28819382/effectiveness-of-the-benign-and-malignant-diagnosis-of-mediastinal-and-hilar-lymph-nodes-by-endobronchial-ultrasound-elastography
#1
Haidong Huang, Zhiang Huang, Qin Wang, Xinan Wang, Yuchao Dong, Wei Zhang, Paul Zarogoulidis, Yan-Gao Man, Wolfgang Hohenforst Schmidt, Chong Bai
Background and Objectives: Endobronchial ultrasound elastography is a new technique for describing the stiffness of tissue during endobronchial ultrasound-guided transbronchial needle aspiration (EBUS-TBNA). The aims of this study were to investigate the diagnostic value of Endobronchial ultrasound (EBUS) elastography for distinguishing the difference between benign and malignant lymph nodes among mediastinal and hilar lymph node. Materials and Methods: From June 2015 to August 2015, 47 patients confirmed of mediastinal and hilar lymph node enlargement through examination of Computed tomography (CT) were enrolled, and a total of 78 lymph nodes were evaluated by endobronchial ultrasound-guided transbronchial needle aspiration (EBUS-TBNA)...
2017: Journal of Cancer
https://www.readbyqxmd.com/read/28818306/time-harmonic-ultrasound-elastography-of-the-descending-abdominal-aorta-initial-results
#2
Lars-Arne Schaafs, Heiko Tzschätzsch, Markus van der Giet, Alexander Reshetnik, Ingo G Steffen, Bernd Hamm, Jürgen Braun, Ingolf Sack, Thomas Elgeti
Stiffening of central large vessels is considered a key pathophysiologic factor within the cardiovascular system. Current diagnostic parameters such as pulse wave velocity (PWV) indirectly measure aortic stiffness, a hallmark of coronary diseases. The aim of the present study was to perform elastography of the proximal abdominal aorta based on externally induced time-harmonic shear waves. Experiments were performed in 30 healthy volunteers (25 young, 5 old, >50 y) and 5 patients with longstanding hypertension (PWV >10 m/s)...
August 14, 2017: Ultrasound in Medicine & Biology
https://www.readbyqxmd.com/read/28806905/evaluation-of-the-cervix-tissue-homogeneity-by-ultrasound-elastography-in-infertile-women-for-the-prediction-of-embryo-transfer-ease-a-diagnostic-accuracy-study
#3
Antonio Stanziano, Anna Maria Caringella, Clementina Cantatore, Giuseppe Trojano, Ettore Caroppo, Giuseppe D'Amato
BACKGROUND: Ultrasound elastography is a non-invasive medical imaging technique able to quantitatively characterize the stiffness of a given tissue. It has been shown to predict the risk for cervical insufficiency and preterm delivery, and to allow differentiation of malignancy from normal tissue. The present study sought to evaluate whether cervical tissue dishomogeneity, as assessed by cervical ultrasound elastography, may predict the embryo transfer (ET) ease in infertile women undergoing IVF/ICSI...
August 14, 2017: Reproductive Biology and Endocrinology: RB&E
https://www.readbyqxmd.com/read/28800087/imaging-features-of-non-alcoholic-fatty-liver-disease-in-children-and-adolescents
#4
REVIEW
Michele Di Martino, Kameliya Koryukova, Mario Bezzi, Carlo Catalano
Non-invasive diagnosis and quantification of liver steatosis is important to overcome limits of liver biopsy, in order to follow up patients during their therapy and to establish a reference standard that can be used in clinical trials and longitudinal studies. Imaging offers several methods in this setting: ultrasound, which is the cheapest technique and easy to perform; magnetic resonance spectroscopy (MRS), which reflects the real content of triglycerides in a specific volume; and proton density fat fraction (PDFF) magnetic resonance, which is a simple method that reflects the distribution of the fat in the whole liver...
August 11, 2017: Children
https://www.readbyqxmd.com/read/28798325/virtual-touch-tissue-imaging-and-quantification-value-in-malignancy-prediction-for-complex-cystic-and-solid-breast-lesions
#5
Ying Zhang, Chong-Ke Zhao, Xiao-Long Li, Ya-Ping He, Wei-Wei Ren, Cai-Ping Zou, Yue-Wu Du, Hui-Xiong Xu
This study was aimed to evaluatethe usefulness of conventional ultrasound (US) and US elastography, including the latest virtual touch tissue imaging and quantification (VTIQ), in malignancy prediction for complex cystic and solid breast lesions. Eighty-nine complex cystic and solid breast lesions were subject to conventional US and US elastography, including strain elastography (SE), virtual touch tissue imaging (VTI) and VTIQ. Among the 89 lesions, thirty-four (38.2%) lesions were malignant and 55 (61.8%) lesions were benign...
August 10, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28765991/ultrasound-elastography-in-tendon-pathology-state-of-the-art
#6
REVIEW
Romain Domenichini, Jean-Baptiste Pialat, Andrea Podda, Sébastien Aubry
Elastography assesses the biomechanical and structural properties of tissues by measuring their stiffness. Despite promising results, elastography has not yet earned its place in the daily practice of musculoskeletal radiologists. The purpose of this article is to present and examine the data available to date on ultrasound elastography of the tendons through a review of the literature to provide musculoskeletal radiologists with an overview that may help them better understand and use elastography routinely...
August 1, 2017: Skeletal Radiology
https://www.readbyqxmd.com/read/28765627/value-of-shear-wave-arrival-time-contour-display-in-shear-wave-elastography-for-breast-masses-diagnosis
#7
Bang-Guo Zhou, Dan Wang, Wei-Wei Ren, Xiao-Long Li, Ya-Ping He, Bo-Ji Liu, Qiao Wang, Shi-Gao Chen, Azra Alizad, Hui-Xiong Xu
To evaluate the diagnostic performance of shear wave arrival time contour (SWATC) display for the diagnosis of breast lesions and to identify factors associated with the quality of shear wave propagation (QSWP) in breast lesions. This study included 277 pathologically confirmed breast lesions. Conventional B-mode ultrasound characteristics and shear wave elastography parameters were computed. Using the SWATC display, the QSWP of each lesion was assigned to a two-point scale: score 1 (low quality) and score 2 (high quality)...
August 1, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28764941/biopsy-needle-tracking-technique-in-us-images
#8
Joanna Czajkowska, Bartłomiej Pyciński, Jan Juszczyk, Ewa Pietka
Fast development of imaging techniques in last decades has offered the intra-operative visualization as the integral part of surgical tools. Therefore, on-going research activities still focus on efficient and robust analysis of ultrasound images. The paper meets these requirements targeting in detection of biopsy needle, estimation of the needle trajectory and tracking the needle tip motion inside the examined tissue. The developed novel method uses ultrasound data supported by elastography images. The investigated detection algorithm introduces Histogram of Oriented Gradients and image entropy, whereas the tracking part employs Hough transform, Gabor filter and Kanade-Lucas-Tomasi optical flow estimation technique...
July 21, 2017: Computerized Medical Imaging and Graphics: the Official Journal of the Computerized Medical Imaging Society
https://www.readbyqxmd.com/read/28763885/-the-diagnostic-value-of-ultrasonic-elastography-and-ultrasonography-comprehensive-score-in-cervical-lesions
#9
R Lu, Y Xiao
Objective: To evaluate the clinical value of ultrasonic elastography and ultrasonography comprehensive scoring method in the diagnosis of cervical lesions. Methods: A total of 116 patients were selected from the Department of Gynecology of the first hospital affiliated with Central South University from March 2014 to September 2015.All of the lesions were preoperatively examined by Doppler Ultrasound and elastography.The elasticity score was determined by a 5-point scoring method. Calculation of the strain ratio was based on a comparison of the average strain measured in the lesion with the adjacent tissue of the same depth, size, and shape...
July 18, 2017: Zhonghua Yi Xue za Zhi [Chinese medical journal]
https://www.readbyqxmd.com/read/28760576/performances-and-limitations-of-several-ultrasound-based-elastography-techniques-a-phantom-study
#10
Stéphanie Franchi-Abella, Caroline Elie, Jean-Michel Correas
The objective of this study is to assess strain and shear wave (SW) elastography performance in terms of accuracy by performing in vitro measurements on a calibrated elastography phantom. Acquisitions were done on a phantom containing 4 inclusions (12-74 kPa) embedded in a homogeneous background material (30 kPa). We performed qualitative assessment on elastograms, semiquantitative assessment with strain or elasticity ratios between each inclusion and the background and quantitative evaluation with SW acquisitions...
July 28, 2017: Ultrasound in Medicine & Biology
https://www.readbyqxmd.com/read/28756900/evaluation-of-early-kidney-damage-caused-by-brain-death-using-real-time-ultrasound-elastography-in-a-bama-pig-model
#11
Ying Tang, Jingwen Zhao, Dongyang Liu, Ningning Niu, Huimin Yu
The aim of this study was to investigate the value of real-time tissue elastography (RTE) in the evaluation of early graft damage resulting from brain death. We performed RTE before and 0, 3, 6 and 9 h after brain death in a Bama pig model. Eleven RTE parameters were compared among time groups, and their correlations with electron microscopic findings were analyzed. Receiver operating characteristic curve analysis was used to find the RTE parameter cutoff values. The mean relative strain value within the region of interest (MEAN), standard deviation of the relative strain value within the region of interest (SD), percentage area of low strain within the region of interest (%AREA), complexity of low-strain area within the region of interest (COMP), kurtosis (KURT), skewness (SKEW), contrast (CONT) and entropy (ENT) and inverse difference moment (IDM) differed statistically significantly between groups (p < 0...
July 27, 2017: Ultrasound in Medicine & Biology
https://www.readbyqxmd.com/read/28755003/kindlin-2-could-influence-breast-nodule-elasticity-and-improve-lymph-node-metastasis-in-invasive-breast-cancer
#12
Xiaowei Xue, Junlai Li, Wenbo Wan, Xianquan Shi, Yiqiong Zheng
This study investigated the relationship between quantitative parameters of shear wave elastography (SWE, maximum elasticity [Emax], minimum elasticity [Emin], mean elasticity [Emean]), collagen intensity and Kindlin-2 expression in benign and malignant breast nodules, and if Kindlin-2 expression is related with lymph node metastasis. A total of 102 breast nodules from 102 patients were included in our study who underwent ultrasound elastography before surgery or core needle biopsy. There was a significant difference between benign and malignant breast nodules in Emax, Emean, collagen intensity and Kindlin-2 expression, but it had no difference in Emin...
July 28, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28752925/management-of-portal-hypertension-before-and-after-liver-transplantation
#13
L W Unger, G Berlakovich, M Trauner, T Reiberger
Orthotopic liver transplantation (OLT) represents a curative treatment option for end-stage liver disease (ESLD). While epidemiology of ESLD has recently changed due the rising prevalence of non-alcoholic fatty liver disease (NAFLD) and decreased burden of hepatitis C virus (HCV) infections due to highly-effective antiviral regimens, the management of portal hypertension (PHT) remains a clinical challenge in the pre- and post-OLT setting. The measurement of hepatic venous pressure gradient (HVPG) represents the most reliable, but invasive tool for assessment of the severity of PHT...
July 28, 2017: Liver Transplantation
https://www.readbyqxmd.com/read/28744086/differentiation-of-secondary-involvement-of-the-breast-by-lymphoreticular-malignancy-from-fibroadenoma-using-ultrasound-elastography-a-report-of-two-cases
#14
Eren Abdulkadir, Ertan Gulhan, Sila Ulus
Extramedullary lymphoma infiltration of the breast by lymphoblastic lymphoma is very rare and most cases are of B-cell lineage; T-cell neoplasms represent less than 10% of all breast lymphomas. Here, we report one patient with lymphoblastic lymphoma and one patient with leukemia, who have similar lesions in breasts with different ultrasound elastography findings. Ultrasound-guided tru-cut biopsies were performed and the first lesion was confirmed as lymphoma infiltration and the second as fibroadenoma. In cases of breast mass presence in patients with a history of hematologic malignancies such as lymphoma or leukemia, breast infiltration should be kept in mind...
April 2017: Indian Journal of Radiology & Imaging
https://www.readbyqxmd.com/read/28735336/acoustic-radiation-force-impulse-arfi-elastography-and-serological-markers-in-assessment-of-liver-fibrosis-and-free-portal-pressure-in-patients-with-hepatitis-b
#15
Jun Li, Jie Yu, Xin-Yu Peng, Ting-Ting Du, Jia-Jia Wang, Jin Tong, Gui-Lin Lu, Xiang-Wei Wu
BACKGROUND The aim of this study was to investigate the feasibility of using acoustic radiation force impulse (ARFI) elastography, AST-to-platelet ratio index (APRI), and FIB-4 in assessing liver fibrosis and free portal pressure in patients with hepatitis B. MATERIAL AND METHODS We enrolled 126 patients with hepatitis B who underwent liver surgery at the General Surgery Department of the First Affiliated Hospital of Shihezi University Medical School from February 2013 to August 2015. Preoperatively, shear wave velocity (SWV) of the liver was measured with the Siemens S2000 ultrasound system to reflect liver stiffness...
July 23, 2017: Medical Science Monitor: International Medical Journal of Experimental and Clinical Research
https://www.readbyqxmd.com/read/28735201/ultrasound-elastography-of-the-prostate-using-an-unconstrained-modulus-reconstruction-technique-a-pilot-clinical-study
#16
REVIEW
Seyed Reza Mousavi, Hassan Rivaz, Gregory J Czarnota, Abbas Samani, Ali Sadeghi-Naini
A novel full-inversion-based technique for quantitative ultrasound elastography was investigated in a pilot clinical study on five patients for non-invasive detection and localization of prostate cancer and quantification of its extent. Conventional-frequency ultrasound images and radiofrequency (RF) data (~5 MHz) were collected during mechanical stimulation of the prostate using a transrectal ultrasound probe. Pre and post-compression RF data were used to construct the strain images. The Young's modulus (YM) images were subsequently reconstructed using the derived strain images and the stress distribution estimated iteratively using finite element (FE) analysis...
July 20, 2017: Translational Oncology
https://www.readbyqxmd.com/read/28731271/ultrasound-elastography-for-carpal-tunnel-pressure-measurement-a-cadaveric-validation-study
#17
Kazutoshi Kubo, Boran Zhou, Yu-Shiuan Cheng, Tai-Hua Yang, Bo Qiang, Kai-Nan An, Steven L Moran, Peter C Amadio, Xiaoming Zhang, Chunfeng Zhao
Carpal tunnel pressure is a key factor in the etiology of carpal tunnel syndrome. Numerous approaches have been conducted to measure carpal tunnel pressure. However, most techniques are invasive and take time and effort. We have developed an innovative approach to noninvasively assess the tunnel pressure by using the ultrasound surface wave elastography (USWE) technique. In a previous study it was shown that the shear wave speed in a tendon increased linearly with increasing tunnel pressure enclosed the tendon in a simple tendon model...
July 21, 2017: Journal of Orthopaedic Research: Official Publication of the Orthopaedic Research Society
https://www.readbyqxmd.com/read/28729183/differentiation-between-idiopathic-granulomatous-mastitis-and-malignant-breast-lesions-using-strain-ratio-on-ultrasonic-elastography
#18
B Yağcı, I Erdem Toslak, B Çekiç, M Öz, B R Karakaş, M Akdemir, S Yıldız, D Süren, D Bova
PURPOSE: The goal of this study was to investigate the strain elastography imaging characteristics of idiopathic granulomatous mastitis (IGM) and compare strain ratio values of IGM with those of breast cancer. MATERIAL AND METHODS: Twenty-three consecutive women with IGM (mean age, 37.9±6.6 [SD] years; range: 26-52 years) and 45 women with malignant breast tumor (mean age, 52.8±12.0 [SD], range, 32-77 years) who had been scheduled for ultrasound-guided core biopsy were recruited to the study...
July 17, 2017: Diagnostic and Interventional Imaging
https://www.readbyqxmd.com/read/28721972/ultrasound-imaging-features-of-isolated-pancreatic-tuberculosis
#19
Yi Dong, Christian Jürgensen, Rajesh Puri, Mirko D'Onofrio, Michael Hocke, Wen-Ping Wang, Nathan Atkinson, Malay Sharma, Christoph F Dietrich
BACKGROUND AND OBJECTIVES: Isolated pancreatic tuberculosis (PTB) is extremely rare worldwide. The purpose of this multicenter retrospective study is to analyze imaging features of histologically confirmed isolated PTB in order to determine the diagnostic features of the new methods contrast enhanced ultrasound (CEUS), ultrasound elastography and contrast enhanced endoscopic ultrasound (CE-EUS). PATIENTS AND METHODS: We report on a retrospective data collection of 12 cases of PTB confirmed by histology or cytology...
July 19, 2017: Endoscopic Ultrasound
https://www.readbyqxmd.com/read/28720285/ultrasound-based-shear-wave-elastography-in-the-assessment-of-patients-with-diabetic-kidney-disease
#20
Flaviu Bob, Iulia Grosu, Ioan Sporea, Simona Bota, Alina Popescu, Alexandra Sima, Roxana Şirli, Ligia Petrica, Romulus Timar, Adalbert Schiller
In previous studies of acoustic radiation force impulse (ARFI) elastography, using Virtual Touch tissue quantification (VTQ) (Siemens Acuson S2000), it was reported that the measurement of renal shear wave speed in patients with chronic kidney disease (CKD) is not influenced exclusively by renal fibrosis. The purpose of the present study was to analyze the role of VTQ in patients with diabetic kidney disease, considered the main cause of CKD. The study group included 164 patients: 80 patients with diabetic kidney disease (DKD) and 84 without renal disease or diabetes mellitus...
July 15, 2017: Ultrasound in Medicine & Biology
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