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https://www.readbyqxmd.com/read/29334131/a-bayesian-method-for-accelerated-magnetic-resonance-elastography-of-the-liver
#1
Christopher Ebersole, Rizwan Ahmad, Adam V Rich, Lee C Potter, Huiming Dong, Arunark Kolipaka
PURPOSE: Magnetic resonance elastography is a noninvasive tool for quantifying soft tissue stiffness. Magnetic resonance elastography has been adopted as a clinical method for staging liver fibrosis. However, the application of liver magnetic resonance elastography requires multiple lengthy breath-holds. We propose a new data acquisition and processing method to reduce magnetic resonance elastography scan time. METHODS: A Bayesian image reconstruction method that uses transform sparsity and magnitude consistency across different phase offsets to recover images from highly undersampled data is proposed...
January 15, 2018: Magnetic Resonance in Medicine: Official Journal of the Society of Magnetic Resonance in Medicine
https://www.readbyqxmd.com/read/29334119/evaluation-of-four-variants-of-the-thyroid-imaging-reporting-and-data-system-tirads-classification-in-patients-with-multinodular-goiter
#2
Bartosz Migda, Michal Migda, Anna Marta Migda, Jacek Bierca, Jadwiga Slowniska-Srzednicka, Wieslaw Jakubowski, Rafal Zenon Slapa
Purpose The goal this study was to evaluate the utility of four variants of the Thyroid Imaging Reporting and Data System (TIRADS) in the differentiation of focal lesions in individuals with multinodular goiter. Materials and Methods The study was approved by the Local Bioethical Committee. Each patient gave informed consent before enrolment. A total of 163 nodules in 124 patients with multinodular goiter were evaluated by ultrasound. B-mode and PD imaging and strain elastography were performed. Archived images were evaluated via retrospective analysis using four different proposed TIRADS classifications Results Sensitivity and specificity of the Horvath, Park, Kwak, and Russ classifications were 0...
January 15, 2018: Endokrynologia Polska
https://www.readbyqxmd.com/read/29332260/prostate-cancer-rates-in-patients-with-initially-negative-elastography-targeted-biopsy-vs-systematic-biopsy
#3
Jeannette Kratzenberg, Georg Salomon, Pierre Tennstedt, Paolo Dell'Oglio, Derya Tilki, Axel Haferkamp, Markus Graefen, Katharina Boehm
PURPOSE: To assess whether real-time elastography-targeted biopsy (RTE-bx) is superior to the standard systematic transrectal ultrasound (TRUS)-guided biopsy in predicting subsequent prostate cancer (PCa) rates in patients with initially negative biopsy and to specifically reveal differences in the occurrence of high-grade (Gleason ≥ 4 + 3) PCa by comparing both biopsy methods. PATIENTS AND METHODS: Overall, 630 patients had an initially negative prostate biopsy between 2007 and 2015, either RTE targeted (n = 213) or systematically (n = 417)...
January 13, 2018: World Journal of Urology
https://www.readbyqxmd.com/read/29331357/differentiation-of-inflammatory-from-fibrotic-ileal-strictures-among-patients-with-crohn-s-disease-based-on-visual-analysis-feasibility-study-combining-conventional-b-mode-ultrasound-contrast-enhanced-ultrasound-and-strain-elastography
#4
Emilio Quaia, Antonio Giulio Gennari, Maria Assunta Cova, Edwin J R van Beek
The aim of this pilot study was to assess prospectively the feasibility of conventional B-mode ultrasound (US) and contrast-enhanced ultrasound (CEUS) combined with real-time strain elastography (SE) in the differentiation of inflammatory from fibrotic ileal strictures among patients with Crohn's disease (CD) based on visual analysis. Twenty non-consecutive patients (15 male and 5 female; mean age ± standard deviation, 40.2 ± 10.22 y) with CD and stricture of the terminal ileal loop were scanned by conventional B-mode US and CEUS and, subsequently, by real-time SE...
January 10, 2018: Ultrasound in Medicine & Biology
https://www.readbyqxmd.com/read/29331356/assessment-of-diastolic-function-using-ultrasound-elastography
#5
Maryam Vejdani-Jahromi, Jenna Freedman, Young-Joong Kim, Gregg E Trahey, Patrick D Wolf
Shear wave elasticity imaging (SWEI) is a novel ultrasound elastography technique for assessing tissue stiffness. In this study, we investigate the potential of SWEI for providing diastolic functional assessment. In 11 isolated rabbit hearts, pressure-volume (PV) measurements were recorded simultaneously with SWEI recordings from the left ventricle free wall before and after induction of global ischemia. PV-based end diastolic stiffness increased by 100% after ischemia (p <0.05), and SWEI stiffness showed an increase of 103% (p <0...
January 10, 2018: Ultrasound in Medicine & Biology
https://www.readbyqxmd.com/read/29330689/the-efficiency-of-acoustic-radiation-force-impulse-arfi-elastography-in-the-diagnosis-and-staging-of-carpal-tunnel-syndrome
#6
Harun Arslan, Alpaslan Yavuz, Ferda İlgen, Abdurrahman Aycan, Mesut Ozgokce, Hüseyin Akdeniz, Abdussamet Batur
OBJECTIVES: The aim of the present study was to quantify the stiffness of the median nerve (MN) at the carpal tunnel inlet by acoustic radiation force impulse (ARFI) elastography and to evaluate whether ARFI can be used in diagnosis and staging of carpal tunnel syndrome (CTS). METHODS: Sonographic examinations of 96 wrists in 50 patients were included in the study. The cross-sectional area and stiffness of the MN were quantitatively measured by B-mode ultrasonography (USG) and ARFI...
January 12, 2018: Journal of Medical Ultrasonics
https://www.readbyqxmd.com/read/29329992/eus-elastography-strain-ratio-and-fractal-based-quantitative-analysis-for-the-diagnosis-of-solid-pancreatic-lesions
#7
Silvia Carrara, Milena Di Leo, Fabio Grizzi, Loredana Correale, Rahal Daoud, Andrea Anderloni, Francesco Auriemma, Alessandro Fugazza, Paoletta Preatoni, Roberta Maselli, Cesare Hassan, Elena Finati, Benedetto Mangiavillano, Alessandro Repici
BACKGROUND AND AIMS: EUS elastography is useful in characterizing solid pancreatic lesions (SPLs), and fractal analysis-based technology has been used to evaluate geometric complexity in oncology. The aim of this study was to evaluate EUS elastography (strain ratio) and fractal analysis for the characterization of SPLs. METHODS: Consecutive patients with SPLs were prospectively enrolled between December 2015 and February 2017. Elastographic evaluation included parenchymal strain ratio (pSR) and wall strain ratio (wSR) and was performed with the EU-ME2 processor (Olympus)...
January 9, 2018: Gastrointestinal Endoscopy
https://www.readbyqxmd.com/read/29329688/motorizing-and-optimizing-ultrasound-strain-elastography-for-detection-of-intrauterine-growth-restriction-pregnancies
#8
Shier Nee Saw, Jess Yi Ru Low, Citra Nurfarah Zaini Mattar, Arijit Biswas, Lujie Chen, Choon Hwai Yap
Intrauterine growth restriction is a prevalent disease in pregnancy in which placental insufficiency leads to 5 to 10 times higher mortality and lifelong morbidities. The current detection rate is poor, and recently, ultrasound strain elastography (USEL) was proposed as a new diagnostic technique. Currently, placental USEL uses maternal subcutaneous fat as the reference layer, but this is not ideal as fat tissue stiffness can vary widely between subjects. Current USEL also uses manual palpation, and under different compression depths and rates, viscoelastic tissues such as placenta can yield different stiffness results...
January 9, 2018: Ultrasound in Medicine & Biology
https://www.readbyqxmd.com/read/29327169/passive-stiffness-of-monoarticular-lower-leg-muscles-is-influenced-by-knee-joint-angle
#9
Filiz Ateş, Ricardo J Andrade, Sandro R Freitas, François Hug, Lilian Lacourpaille, Raphael Gross, Can A Yucesoy, Antoine Nordez
PURPOSE: While several studies demonstrated the occurrence of intermuscular mechanical interactions, the physiological significance of these interactions remains a matter of debate. The purpose of this study was to quantify the localized changes in the shear modulus of the gastrocnemius lateralis (GL), monoarticular dorsi- and plantar-flexor muscles induced by a change in knee angle. METHOD: Participants underwent slow passive ankle rotations at the following two knee positions: knee flexed at 90° and knee fully extended...
January 11, 2018: European Journal of Applied Physiology
https://www.readbyqxmd.com/read/29326988/editorial
#10
EDITORIAL
Caroline Ewertsen
Dear Colleagues, It is with pleasure that I hereby introduce the ninth issue of UIO. This issue covers a wide range of interesting topics. Some of the topics are also focus areas for the European Federation of Societies for Ultrasound in Medicine and Biology (EFSUMB), namely student education in ultrasound and elastography. Guidelines are available under www.efsumb.org.
September 2017: Ultrasound International Open
https://www.readbyqxmd.com/read/29325584/adenomatoid-tumor-of-the-testis-mimicking-malignant-testicular-cancer-on-multiparametric-ultrasound
#11
Renate Pichler, Gennadi Tulchiner, Fabian Steinkohl, Afschin Soleiman, Wolfgang Horninger, Isabel Maria Heidegger, Friedrich Aigner
BACKGROUND: Adenomatoid tumor is one of the most common histological subtypes of paratesticular cancer arising from the epididymis. In very rare cases, these tumors appear as intratesticular lesions originating in the tunica albuginea, representing a diagnostic challenge. CASE PRESENTATION: We present a case of a 51-year-old man with a small (0.9 cm) hyperechoic lesion of the left testicle mimicking testicular cancer on multiparametric ultrasound. The lesion was localized in the peripheral zone, confirming vascularization and increased stiffness on contrast-enhanced ultrasound and real-time elastography...
January 11, 2018: European Journal of Medical Research
https://www.readbyqxmd.com/read/29322599/non-invasive-evaluation-of-portal-hypertension-using-shear-wave-elastography-analysis-of-two-algorithms-combining-liver-and-spleen-stiffness-in-191-patients-with-cirrhosis
#12
L Elkrief, M Ronot, F Andrade, M Dioguardi Burgio, T Issoufaly, M Zappa, O Roux, J Bissonnette, A Payancé, D Lebrec, C Francoz, O Soubrane, D Valla, F Durand, V Vilgrain, L Castera, P-E Rautou
BACKGROUND: Two algorithms based on sequential measurements of liver and spleen stiffness using two-dimensional shearwave elastography (2D-SWE) have been recently proposed to estimate clinically significant portal hypertension (hepatic venous pressure gradient [HVPG] ≥10 mm Hg) in patients with cirrhosis, with excellent diagnostic accuracy. AIM: To validate externally these algorithms in a large cohort of patients with cirrhosis. METHODS: One hundred and ninety-one patients with stable cirrhosis (Child-Pugh class A 39%, B 29% and C 31%) who underwent liver and spleen stiffness measurements using 2D-SWE at the time of HVPG measurement were included...
January 11, 2018: Alimentary Pharmacology & Therapeutics
https://www.readbyqxmd.com/read/29318565/a-case-of-severe-stenosis-of-hepatic-veins-and-inferior-vena-cava-with-stomal-variceal-bleeding-induced-by-oxaliplatin-based-chemotherapy
#13
Hayato Yamaguchi, Yoshihiro Furuichi, Yoshitaka Kasai, Hirohito Takeuchi, Yuu Yoshimasu, Katsutoshi Sugimoto, Ikuo Nakamura, Takao Itoi
A 27-year-old woman with colon cancer and liver metastasis was referred to our hospital. Colectomy and colostomy were performed to improve her ileus. Following 13 sessions of oxaliplatin-based chemotherapy (OC) with mFOLFOX6 + bevacizumab, thrombocytopenia and frequent peristomal bleeding occurred. Computed tomography showed severe ascites, splenomegaly, significant collateral veins around the stoma, and severe stenosis of the hepatic veins (HV) and inferior vena cava (IVC). Ultrasound elastography showed high liver (and spleen) stiffness values...
January 9, 2018: Clinical Journal of Gastroenterology
https://www.readbyqxmd.com/read/29317306/double-dissociation-of-structure-function-relationships-in-memory-and-fluid-intelligence-observed-with-magnetic-resonance-elastography
#14
Curtis L Johnson, Hillary Schwarb, Kevin M Horecka, Matthew D J McGarry, Charles H Hillman, Arthur F Kramer, Neal J Cohen, Aron K Barbey
Brain tissue mechanical properties, measured in vivo with magnetic resonance elastography (MRE), have proven to be sensitive metrics of neural tissue integrity. Recently, our group has reported on the positive relationship between viscoelasticity of the hippocampus and performance on a relational memory task in healthy young adults, which highlighted the potential of sensitive MRE measures for studying brain health and its relation to cognitive function; however, structure-function relationships outside of the hippocampus have not yet been explored...
January 6, 2018: NeuroImage
https://www.readbyqxmd.com/read/29317276/accuracy-of-the-enhanced-liver-fibrosis-test-vs-fibrotest-elastography-and-indirect-markers-in-detection-of-advanced-fibrosis-in-patients-with-alcoholic-liver-disease
#15
Maja Thiele, Bjørn Stæhr Madsen, Janne Fuglsang Hansen, Sönke Detlefsen, Steen Antonsen, Aleksander Krag
BACKGROUND & AIMS: Alcohol is the leading cause of cirrhosis and liver-related mortality, but we lack serum markers to detect compensated disease. We compared the accuracy of the Enhanced Liver Fibrosis test (ELF), the FibroTest, liver stiffness measurements (made by transient elastography and 2-dimensional shear-wave elastography), and 6 indirect marker tests in detection of advanced liver fibrosis (Kleiner stage ≥F3). METHODS: We performed a prospective study of 10 liver fibrosis markers (patented and not), all performed on the same day...
January 6, 2018: Gastroenterology
https://www.readbyqxmd.com/read/29317043/the-role-of-sonoelastography-in-breast-lesions
#16
Richard G Barr
There is a large body of published material that supports the use of elastography, both strain and shear wave, for characterization of breast lesions. To a lesser extent, elastography can be used in the detection of breast abnormalities. This article reviews the principles of elastography regarding breast imaging, reviews the techniques to perform both strain and shear wave elastography, and reviews the literature and discusses how elastography can be used to improve the characterization of breast lesions to allow for decrease in the number of short-term follow-up examinations and benign biopsies...
February 2018: Seminars in Ultrasound, CT, and MR
https://www.readbyqxmd.com/read/29316849/adaptive-mesh-refinement-for-elastic-modulus-reconstruction-in-elastography
#17
Wenxia Wang, Wei Zou, Danfeng Hu, Jiajun Wang
Meshes play a crucial role in determining the accuracy of the elastic modulus reconstruction in the elastography when the finite element method is employed. In this article, we propose an adaptive mesh refinement strategy which can ensure the coincidence of the meshes with the shape of the inclusions in the observed tissue. This strategy is based on the intensity distribution of the strain image where the variance of the strain distribution in each element of the meshes is used to measure the homogeneity of the element, that is, the larger the strain variance is the more inhomogeneous the element will be and hence more detailed information will be included in this element...
January 1, 2018: Proceedings of the Institution of Mechanical Engineers. Part H, Journal of Engineering in Medicine
https://www.readbyqxmd.com/read/29316576/discordance-in-steatosis-classification-between-liver-biopsy-and-transient-elastography-for-high-controlled-attenuation-parameter-cap-values
#18
Johanna Galaski, Lisa Schulz, Jenny Krause, Ansgar W Lohse
OBJECTIVE:  The controlled attenuation parameter (CAP) measured by transient elastography allows for the noninvasive assessment of hepatic steatosis. However, discrepant results between CAP values and histological evaluation have been reported in particular with high CAP values. We therefore investigated the diagnostic validity of high CAP measurements. METHODS:  Forty patients with liver disease and CAP measurements > 300 dB/m that underwent ultrasound-guided or minilaparoscopic liver biopsy were retrospectively enrolled...
January 2018: Zeitschrift Für Gastroenterologie
https://www.readbyqxmd.com/read/29315789/three-dimensional-shear-wave-elastography-for-differentiating-benign-from-malignant-thyroid-nodules
#19
Chong-Ke Zhao, Shi-Gao Chen, Azra Alizad, Ya-Ping He, Qiao Wang, Dan Wang, Wen-Wen Yue, Kun Zhang, Shen Qu, Qing Wei, Hui-Xiong Xu
OBJECTIVES: To prospectively evaluate the diagnostic performance of 3-dimensional (3D) shear wave elastography (SWE) for assessing thyroid nodules. METHODS: A total of 176 surgically or cytologically confirmed thyroid nodules (63 malignant and 113 benign) in 176 patients who had undergone conventional ultrasound (US), 2-dimensional (2D) SWE, and 3D SWE examinations were included in this study. Quantitative elasticity values (mean elasticity, maximum elasticity, and standard deviation of elasticity of a large region of interest and mean elasticity of a 2-mm region of interest) were measured on 2D and 3D SWE...
January 9, 2018: Journal of Ultrasound in Medicine: Official Journal of the American Institute of Ultrasound in Medicine
https://www.readbyqxmd.com/read/29313270/ultrasound-elastography-based-assessment-of-the-elasticity-of-the-supraspinatus-muscle-in-impingement-syndrome-does-elastography-has-any-diagnostic-value
#20
Adnan Demirel, Murat Baykara, Tuba Tülay Koca, Ejder Berk
Ultrasound elastography (UE) is a new ultrasound-based imaging technique that provides information about elasticity and stiffness of tissues. This cross-sectional study aimed to identify the diagnostic importance of UE in supraspinatus impingement syndrome. Forty-one subjects, aged 38-70 years, were included in the study. UE was used to determine the elasticity of the supraspinatus muscle. The strain ratio was calculated as the evaluation criteria to measure the elasticity of the muscle. High strain ratio indicated low elasticity...
January 8, 2018: Clinical Rheumatology
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