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https://www.readbyqxmd.com/read/29334176/the-effect-of-22-5-khz-low-frequency-contact-ultrasound-debridement-lfcud-on-lower-extremity-wound-healing-for-a-vascular-surgery-population-a-randomised-controlled-trial
#1
Christine Anne Murphy, Pamela Houghton, Tim Brandys, Gregory Rose, Dianne Bryant
The aim of this study was to compare changes in wound size and appearance and health complication rates in patients with vasculopathy and lower-extremity wounds treated with or without low-frequency contact ultrasound debridement (LFCUD) This study was a randomised controlled trial. The study was conducted in a vascular surgery service, including outpatient wound clinic and inpatient ward, in a tertiary care academic centre. In total, 70 patients with vasculopathy and lower-extremity wounds of mixed aetiology were enrolled in the trial; 68 completed the study...
January 15, 2018: International Wound Journal
https://www.readbyqxmd.com/read/29290810/tumour-vascular-shutdown-and-cell-death-following-ultrasound-microbubble-enhanced-radiation-therapy
#2
Ahmed El Kaffas, Mehrdad J Gangeh, Golnaz Farhat, William Tyler Tran, Amr Hashim, Anoja Giles, Gregory J Czarnota
High-dose radiotherapy effects are regulated by acute tumour endothelial cell death followed by rapid tumour cell death instead of canonical DNA break damage. Pre-treatment with ultrasound-stimulated microbubbles (USMB) has enabled higher-dose radiation effects with conventional radiation doses. This study aimed to confirm acute and longitudinal relationships between vascular shutdown and tumour cell death following radiation and USMB in a wild type murine fibrosarcoma model using in vivo imaging. Methods: Tumour xenografts were treated with single radiation doses of 2 or 8 Gy alone, or in combination with low-/high-concentration USMB...
2018: Theranostics
https://www.readbyqxmd.com/read/29289101/attenuation-of-low-frequency-underwater-sound-using-an-array-of-air-filled-balloons-and-comparison-to-effective-medium-theory
#3
Kevin M Lee, Preston S Wilson, Mark S Wochner
The ultimate goal of this work is to accurately predict the attenuation through a collection of large (on the order of 10-cm-radius) tethered encapsulated bubbles used in underwater noise abatement systems. Measurements of underwater sound attenuation were performed during a set of lake experiments, where a low-frequency compact electromechanical sound source was surrounded by different arrays of encapsulated bubbles with various individual bubbles sizes and void fractions. The measurements were compared with an existing predictive model [Church, J...
December 2017: Journal of the Acoustical Society of America
https://www.readbyqxmd.com/read/29283354/ultrasound-detection-using-acoustic-apertures
#4
Evgeny Hahamovich, Amir Rosenthal
Ultrasound detection is commonly performed by piezoelectric transducers that are optimized for a specific application. Since the piezoelectric technology is not configurable, transducers designed for one application may not be compatible with other applications. In addition, some designs of ultrasound transducers may be difficult to implement owing to production constraints. In this paper, we propose a simple, low-cost method to reconfigure the geometry of ultrasound transducers. The technique is based on using apertures in thin sheets of acoustic blockers...
January 2018: IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control
https://www.readbyqxmd.com/read/29283342/acoustic-radiation-force-induced-creep-recovery-arficr-a-noninvasive-method-to-characterize-tissue-viscoelasticity
#5
Carolina Amador Carrascal, Shigao Chen, Matthew W Urban, James F Greenleaf
Ultrasound shear wave elastography is a promising noninvasive, low cost, and clinically viable tool for liver fibrosis staging. Current shear wave imaging technologies on clinical ultrasound scanners ignore shear wave dispersion and use a single group velocity measured over the shear wave bandwidth to estimate tissue elasticity. The center frequency and bandwidth of shear waves induced by acoustic radiation force depend on the ultrasound push beam (push duration, -number, etc.) and the viscoelasticity of the medium, and therefore are different across scanners from different vendors...
January 2018: IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control
https://www.readbyqxmd.com/read/29273553/association-between-fasn-gene-polymorphisms-ultrasound-carcass-traits-and-intramuscular-fat-in-qinchuan-cattle
#6
Sayed Haidar Abbas Raza, Linsheng Gui, Rajwali Khan, Nicola M Schreurs, Wang Xiaoyu, Sen Wu, Chugang Mei, Li Wang, Xueyao Ma, Dawei Wei, Hongfang Guo, Song Zhang, Xingping Wang, Hubdar Ali Kaleri, Linsen Zan
Fatty acid synthase (FASN) is an enzyme involved with fat deposition and fatty acid composition in cattle. This study was conducted to detect single nucleotide polymorphisms (SNPs) of the FASN gene and explore their relationships with ultrasound carcass traits in order to assess the potential use of the FASN gene for the breeding selection of Qinchuan cattle for desirable carcass traits. The frequencies of SNP g.12740C>T, g.13192T>C and g.13232C>T were identified in 525 individual Qinchuan cattle which were also assessed for backfat depth, eye muscle area and intramuscular fat by ultrasound...
December 19, 2017: Gene
https://www.readbyqxmd.com/read/29260640/ultrasound-self-referral-does-not-increase-utilization-in-pediatric-urology
#7
Lesli Nicolay, Adam S Howe, Lane S Palmer
INTRODUCTION: Costs of radiologic imaging are rising. The goal of this study is to examine the utilization practices of pediatric urologists who have access to in-office ultrasound imaging when managing children with primary hydronephrosis. MATERIALS AND METHODS: A retrospective cross sectional study was performed of children ≤ 5 years old with an isolated diagnosis of hydronephrosis. Ultrasound utilization was evaluated by tallying the number of ultrasounds obtained during the time each child was followed...
December 2017: Canadian Journal of Urology
https://www.readbyqxmd.com/read/29247953/efficient-decolorization-of-typical-azo-dyes-using-low-frequency-ultrasound-in-presence-of-carbonate-and-hydrogen-peroxide
#8
Tongqian Zhao, Peng Li, Chao Tai, Jiaping She, Yongguang Yin, Yong'an Qi, Guocheng Zhang
The aims of this study as to evaluate and understand the decolorization of azo dyes using carbonate and hydrogen peroxide under low-frequency ultrasonic irradiation. Under optimal conditions, the decolorization ratio of acid orange 8 (AO 8), a typical azo dye, was > 90% after 2 h of irradiation. The decolorization rate of AO 8 was 0.023 min-1 under ultrasonic irradiation, which was about two times that without ultrasound. Different from the results of other published studies, OH played a minor role, while CO3- played the most important role in AO 8 ultrasonic decolorization in the presence of CO32- and H2O2, with a contribution of 56...
December 7, 2017: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/29239225/ureteroscopic-high-frequency-dusting-utilizing-a-120-watt-holmium-laser
#9
James M Tracey, Galina Gagin, Duncan Morhardt, John M Hollingsworth, Khurshid R Ghani
INTRODUCTION & OBJECTIVE: Recently there has been interest in a dusting technique for lithotripsy during ureteroscopy (URS) utilizing high frequency and low pulse energy (HiFr-LoPE) settings. We assessed a 120 Watt holmium laser that permits high frequency (>50 Hz) dusting. MATERIALS AND METHODS: Consecutive URS cases performed by a single surgeon using the P120H (Lumenis, San Jose, CA) were reviewed. Lithotripsy was performed using HiFr-LoPE settings [50-80 Hz /0...
December 14, 2017: Journal of Endourology
https://www.readbyqxmd.com/read/29237506/tgf-%C3%AE-1-induced-chondrogenesis-of-bone-marrow-mesenchymal-stem-cells-is-promoted-by-low-intensity-pulsed-ultrasound-through-the-integrin-mtor-signaling-pathway
#10
Peng Xia, Xiaoju Wang, Yanping Qu, Qiang Lin, Kai Cheng, Mingxia Gao, Shasha Ren, Tingting Zhang, Xueping Li
BACKGROUND: Low-intensity pulsed ultrasound (LIPUS) is a mechanical stimulus that plays a key role in regulating the differentiation of bone marrow mesenchymal stem cells (BMSCs). However, the way in which it affects the chondrogenic differentiation of BMSCs remains unknown. In this study, we aimed to investigate whether LIPUS is able to influence TGF-β1-induced chondrogenesis of BMSCs through the integrin-mechanistic target of the Rapamycin (mTOR) signaling pathway. METHODS: BMSCs were isolated from rat bone marrow and cultured in either standard or TGF-β1-treated culture medium...
December 13, 2017: Stem Cell Research & Therapy
https://www.readbyqxmd.com/read/29233691/enthesopathy-in-rheumatoid-arthritis-and-spondyloarthritis-an-ultrasound-study
#11
Esther Ebstein, Baptiste Coustet, Vanina Masson-Behar, Marine Forien, Elisabeth Palazzo, Philippe Dieudé, Sébastien Ottaviani
OBJECTIVE: We aimed to compare the prevalence of enthesopathy seen on ultrasonography (US) in spondyloarthritis (SpA) and rheumatoid arthritis (RA) and compared it to healthy controls. METHODS: All included patients with RA (2010 ACR/EULAR criteria) and SpA (ASAS criteria) and healthy controls underwent clinical and US evaluation of enthesis at seven sites (quadriceps, proximal and distal patellar, Achilles and triceps tendons, plantar aponeurosis and lateral epicondyle enthesis)...
December 9, 2017: Joint, Bone, Spine: Revue du Rhumatisme
https://www.readbyqxmd.com/read/29232870/synthesis-and-characterization-of-nanofunctionalized-gelatin-methacrylate-hydrogels
#12
Kamel Rahali, Ghazi Ben Messaoud, Cyril J F Kahn, Laura Sanchez-Gonzalez, Mouna Kaci, Franck Cleymand, Solenne Fleutot, Michel Linder, Stéphane Desobry, Elmira Arab-Tehrany
Given the importance of the extracellular medium during tissue formation, it was wise to develop an artificial structure that mimics the extracellular matrix while having improved physico-chemical properties. That is why the choice was focused on gelatin methacryloyl (GelMA), an inexpensive biocompatible hydrogel. Physicochemical and mechanical properties were improved by the incorporation of nanoparticles developed from two innovative fabrication processes: High shear fluid and low frequencies/high frequencies ultrasounds...
December 10, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/29232845/hybrid-signal-processing-technique-to-improve-the-defect-estimation-in-ultrasonic-non-destructive-testing-of-composite-structures
#13
Kumar Anubhav Tiwari, Renaldas Raisutis, Vykintas Samaitis
This work proposes a novel hybrid signal processing technique to extract information on disbond-type defects from a single B-scan in the process of non-destructive testing (NDT) of glass fiber reinforced plastic (GFRP) material using ultrasonic guided waves (GW). The selected GFRP sample has been a segment of wind turbine blade, which possessed an aerodynamic shape. Two disbond type defects having diameters of 15 mm and 25 mm were artificially constructed on its trailing edge. The experiment has been performed using the low-frequency ultrasonic system developed at the Ultrasound Institute of Kaunas University of Technology and only one side of the sample was accessed...
December 9, 2017: Sensors
https://www.readbyqxmd.com/read/29231592/-ultrasonic-imaging-research-at-ashi-points-in-neck-type-cervical-spondylosis
#14
Xiaoming Wu, Fengwei Tian, Zhaopeng Xie, Guifang Dong, Jianjun Li, Xi Zhou
OBJECTIVE: To conduct the preliminary positioning and qualitative research of high-frequency ultrasonic imaging at Ashi points (including tender points and trigger points) in neck-type cervical spondylosis and explore the relevant law so as to provide the evidence for the selection of acupuncture scheme. METHODS: Thirty patients in compliance with the diagnostic criteria of neck-type cervical spondylosis were selected. The trigger points, tender points and placebo points were positioned on any of the three available oriented lines...
April 12, 2017: Zhongguo Zhen Jiu, Chinese Acupuncture & Moxibustion
https://www.readbyqxmd.com/read/29228074/a-review-of-the-current-therapies-challenges-and-future-directions-of-transcranial-focused-ultrasound-technology-advances-in-diagnosis-and-treatment
#15
Vibhor Krishna, Francesco Sammartino, Ali Rezai
Importance: Magnetic resonance imaging-guided focused ultrasound ablation has been approved for the treatment of refractory essential tremor and is being studied for other neurological indications, including dyskinesias and tremor in Parkinson disease, dystonia, neuropathic pain, obsessive-compulsive disorder, epilepsy, and brain tumors. Objective: To review the scientific foundations of FUS technology, existing neurological applications, and future advances. Evidence Review: PubMed was searched for the past 10 years using the terms "transcranial ultrasound," "focused ultrasound," and "neurological applications...
December 11, 2017: JAMA Neurology
https://www.readbyqxmd.com/read/29206754/abdominal-ultrasound-does-not-reveal-significant-alterations-in-patients-with-nonceliac-wheat-sensitivity
#16
Maurizio Soresi, Pasquale Mansueto, Antonino Terranova, Alberto D'Alcamo, Francesco La Blasca, Francesca Cavataio, Rosario Iacobucci, Antonio Carroccio
GOALS: The goal of this study was (A) to evaluate abdominal ultrasound signs in nonceliac wheat sensitivity (NCWS) patients for features useful in diagnosis and (B) to compare these aspects with those of celiac patients to assess whether ultrasound can be useful in the differential diagnosis between NCWS and celiac disease (CD). BACKGROUND: NCWS diagnosis is difficult as no biomarkers of this condition have as yet been identified. In CD ultrasound aspects have been identified that have a good diagnostic accuracy...
December 4, 2017: Journal of Clinical Gastroenterology
https://www.readbyqxmd.com/read/29203734/effect-of-pioglitazone-on-insulin-resistance-progression-of-atherosclerosis-and-clinical-course-of-coronary-heart-disease
#17
Olha V Skochko, Igor P Kaidashev
INTRODUCTION: Pioglitazone, a medication of thiazolidinedione group, is capable of triggering the peroxisome proliferator-activated receptors (PPAR-γ). Activation of receptor PPAR-γ regulates carbohydrate and lipid metabolism, immune and inflammatory responses in heart tissues. THE AIM: Our aim was to study the effect of pioglitazone on insulin resistance, the clinical course of atherosclerosis and coronary heart disease (CHD). MATERIALS AND METHODS: The study included 43 patients with coronary artery disease...
2017: Wiadomości Lekarskie: Organ Polskiego Towarzystwa Lekarskiego
https://www.readbyqxmd.com/read/29199267/high-frequency-color-doppler-ultrasound-in-diagnosis-treatment-and-rehabilitation-of-achilles-tendon-injury
#18
Wen Liu, Haiying Zhuang, Dazhang Shao, Liangliang Wang, Miao Shi
BACKGROUND This study evaluated the clinical application of high-frequency color Doppler ultrasonography (HFCDU) in the diagnosis, treatment, and rehabilitation of Achilles tendon injury. MATERIAL AND METHODS A total of 68 patients with suspected Achilles tendon injury were examined by HFCDU. There were 42 Achilles tendon injury patients who underwent surgery, and they were randomly divided into a routine treatment group (n=21) and a rehabilitation group (n=21). HFCDU was performed at weeks 1, 3, 6, and 9, and months 3, 6, 9, 12, and 24 after the operation...
December 4, 2017: Medical Science Monitor: International Medical Journal of Experimental and Clinical Research
https://www.readbyqxmd.com/read/29197912/point-shear-wave-elastography-pswe-using-acoustic-radiation-force-impulse-arfi-imaging-a-feasibility-study-and-norm-values-for-renal-parenchymal-stiffness-in-healthy-children-and-adolescents
#19
Lilian Grass, Nora Szekely, Abdulsattar Alrajab, Thi Thanh Tam Bui-Ta, Georg Friedrich Hoffmann, Elke Wühl, Jens-Peter Schenk
AIMS: To evaluate the applicability of point shear wave elastography (pSWE) for measuring renal parenchymal stiffness in healthy children and adolescents and to establish norm values for shear wave speed (SWS) using two ARFI methods and ultrasound probes. MATERIAL AND METHODS: We prospectively investigated 264 children (43.9% males). pSWE (Virtual TouchTM Quantification and Virtual TouchTM Imaging Quantification (VTQ and VTIQ; Siemens, Germany)) was performed in the renal cortex of 528 healthy kidneys using a 1-6 MHz convex and a 4-9 MHz linear ultrasound probe in ventrolateral and dorsal examinations...
November 29, 2017: Medical Ultrasonography
https://www.readbyqxmd.com/read/29197910/detection-and-characterization-of-small-superficially-located-focal-liver-lesions-by-contrast-enhanced-ultrasound-with-high-frequency-transducers
#20
Wen-Ping Wang, Yi Dong, Jiaying Cao, Feng Mao, Yadan Xu, Qin Si, Christoph F Dietrich
AIM: To evaluate the benefits of contrast-enhanced ultrasound (CEUS) with high frequency transducers in the detection and characterization of small superficially located focal liver lesions (FLLs). MATERIAL AND METHODS: From January 2015 to October 2016, 27 superficial FLLs detected by MRI were examined, first with the low frequency convex transducer (1-5 MHz) and afterwards with a high frequency transducer (7.5-12 MHz). High frequency dynamic CEUS was performed after a bolus injection of 2...
November 29, 2017: Medical Ultrasonography
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