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https://www.readbyqxmd.com/read/28324973/force-controlled-ultrasound-to-measure-passive-mechanical-properties-of-muscle-in-duchenne-muscular-dystrophy
#1
Anne J Pigula, Jim S Wu, Matthew W Gilbertson, Basil T Darras, Seward B Rutkove, Brian W Anthony
The purpose of this study is to assess differences in skeletal muscle compressibility between patients with Duchenne muscular dystrophy (DMD) and normal subjects. The transverse passive mechanical properties of muscle, particularly those related to stiffness and elasticity, can be measured using force-controlled ultrasound. We acquired ultrasound videos of muscle compression under known pressures in the biceps and quadriceps in 23 boys with DMD and 20 age-matched healthy controls. We calculated the bulk linear spring constant, nonlinear stress-strain response, and average Young's modulus for each...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28324886/the-effect-of-ovarian-cancer-screening-on-sexual-activity-and-functioning-results-from-the-uk-collaborative-trial-of-ovarian-cancer-screening-rct
#2
Lesley Fallowfield, Ivonne Solis-Trapala, Usha Menon, Carolyn Langridge, Shirley May, Ian Jacobs, Valerie Jenkins
BACKGROUND: To examine the impact of multimodal (MMS) and ultrasound (USS) screening on the sexual activity and functioning of 22 966 women in the UK Collaborative Trial of Ovarian Cancer Screening (UKCTOCS) RCT. METHODS: Fallowfield's Sexual Activity Questionnaire (FSAQ) was completed prior to randomisation, then annually in a random sample (RS) of women from MMS, USS and control groups. Any women in the study who required repeat screening due to unsatisfactory results formed an Events Sample (ES); they completed questionnaires following an event and annually thereafter...
March 21, 2017: British Journal of Cancer
https://www.readbyqxmd.com/read/28324812/the-effects-of-ovarian-biopsy-and-blood-sampling-methods-on-salivary-cortisol-and-behaviour-in-sows
#3
Jinhyeon Yun, Stefan Björkman, Merja Pöytäkangas, Olli Peltoniemi
In reproductive physiology research, experimental animals are often subjected to stressful procedures, including blood sampling and biopsy. In this present study, presence of pain or distress induced by four different procedures was examined using a measurement of salivary cortisol levels and activity observations in sows. The treatments were: 1) PAL: The ovary was palpated through the rectum without snaring, 2) TUB: transvaginal ultrasound-guided biopsy of the ovary was conducted without snaring, 3) SNA: a soft rope snare was placed around the maxilla, 4) CAT: A soft rope snare was placed around the maxilla, and an intravenous catheter was inserted through the ear vein of the sows...
March 11, 2017: Research in Veterinary Science
https://www.readbyqxmd.com/read/28323733/linear-endobronchial-ultrasound-guided-insertion-of-a-fiducial-marker-a-new-tool-for-tracking-central-lesions
#4
Alessio Casutt, Angela Koutsokera, Nicolas Peguret, Alban Lovis
Stereotactic body radiotherapy (SBRT) is an effective method for the treatment of localized primary lung tumors. Cyberknife, a highly accurate SBRT technique, follows the target during respiratory cycles using a metallic fiducial marker (FM) previously inserted into the lesion. Various methods have been described for the placement of an FM in peripheral pulmonary lesions; however, none of these is appropriate for mediastinal or hilar tumors. The placement of FMs in central lesions to achieve accurate SBRT is particularly relevant due to their higher mobility during respiratory and cardiac cycles...
April 2017: Journal of Bronchology & Interventional Pulmonology
https://www.readbyqxmd.com/read/28319821/application-of-p4-polyphase-codes-pulse-compression-method-to-air-coupled-ultrasonic-testing-systems
#5
Honggang Li, Zhenggan Zhou
Air-coupled ultrasonic testing systems are usually restricted by low signal-to-noise ratios (SNR). The use of pulse compression techniques based on P4 Polyphase codes can improve the ultrasound SNR. This type of codes can generate higher Peak Side Lobe (PSL) ratio and lower noise of compressed signal. This paper proposes the use of P4 Polyphase sequences to code ultrasound with a NDT system based on air-coupled piezoelectric transducer. Furthermore, the principle of selecting parameters of P4 Polyphase sequence for obtaining optimal pulse compression effect is also studied...
March 3, 2017: Ultrasonics
https://www.readbyqxmd.com/read/28319552/evaluation-of-lung-function-and-clinical-features-of-the-ultrasound-guided-stellate-ganglion-block-with-2-different-concentrations-of-a-local-anesthetic-a-randomized-controlled-trial
#6
Won-Joong Kim, Hahck Soo Park, Myung Sub Yi, Gill-Hoi Koo, Hwa-Yong Shin
BACKGROUND: One possible complication of stellate ganglion block (SGB) is respiratory compromise. No study has yet addressed the comparison of its effect on lung function and clinical features, including Horner's syndrome, changes in temperature, sensory and motor functions, and adverse events of lower versus higher concentrations (LC and HC, respectively) of local anesthetics in an ultrasound-guided SGB. METHODS: Fifty patients were randomized into 1 of 2 groups: the LC group (5 mL of 0...
April 2017: Anesthesia and Analgesia
https://www.readbyqxmd.com/read/28319508/exercise-combined-with-ultrasound-attenuates-neuropathic-pain-in-rats-associated-with-downregulation-of-il-6-and-tnf-%C3%AE-but-with-upregulation-of-il-10
#7
Po-Ching Huang, Kun-Ling Tsai, Yu-Wen Chen, Heng-Teng Lin, Ching-Hsia Hung
BACKGROUND: Although there are several evidences that suggest efficacies of therapeutic ultrasound (TU) or treadmill exercise (TE) to alleviate nerve injury-associated pain, molecular mechanisms are less clear. We aimed to investigate the impact of TU and/or TE on neuropathic pain induced by chronic constriction injury (CCI) of the sciatic nerve and their roles of proinflammatory and anti-inflammatory cytokines. METHODS: Rats were randomly divided into (n = 10 per group) sham operation (sham), CCI procedure followed by false application of TU (CCI + TU0), CCI procedure followed by false application of TU and TE (CCI + TU0 + TE), CCI, and CCI procedure followed by TU alone (CCI + TU), TE alone (CCI + TE), or both TU and TE (CCI + TU + TE) groups...
March 17, 2017: Anesthesia and Analgesia
https://www.readbyqxmd.com/read/28319345/percutaneous-microwave-ablation-of-exophytic-tumors-in-hepatocellular-carcinoma-patients-safe-or-not
#8
Jianmin Ding, Yan Zhou, Yandong Wang, Xiang Jing, Fengmei Wang, Yijun Wang
BACKGROUND & AIMS: To explore the long-term outcomes and safety of ultrasound-guided percutaneous microwave ablation (MWA) of exophytic tumors in hepatocellular carcinoma (HCC) patients. METHODS: One hundred and thirty-two patients with subcapsular HCC were enrolled in this retrospective study. These patients were divided into the exophytic group (n=71) and non-exophytic group (n=61) according to the location of the tumor(s). A special technology of puncture and ablation was performed to treat the exophytic tumors...
March 20, 2017: Liver International: Official Journal of the International Association for the Study of the Liver
https://www.readbyqxmd.com/read/28319286/a-successful-model-to-learn-and-implement-ultrasound-guided-venous-catheterization-in-apheresis
#9
Nigopan Gopalasingam, Anna-Marie Eller Thomsen, Lars Folkersen, Peter Juhl-Olsen, Erik Sloth
BACKGROUND: Apheresis treatments can be performed with peripheral venous catheters (PVC), although central venous catheters (CVC) are inserted when PVCs fail or patient with history of difficult vascular access prior to the apheresis. Ultrasound guidance for PVC has shown promising results in other settings. PURPOSE: To investigate if ultrasound guidance for PVC could be implemented among apheresis nurses. Second, how implementation of ultrasound guidance affected the number of CVCs used for apheresis per patient...
March 20, 2017: Journal of Clinical Apheresis
https://www.readbyqxmd.com/read/28318963/an-investigation-of-ultrasound-effect-on-digestate-solubilization-and-methane-yield
#10
Temesgen Garoma, David Pappaterra
In this study, different ultrasound power intensities of 0.05-0.21kW/L (4.13-16.52kWh/kg TS) were applied at a frequency of 20kHz and for durations of 5-20min to digestate obtained from a domestic wastewater treatment plant. The ultrasonic effect on digestate solubilization was revealed by increased levels of soluble Chemical Oxygen Demand (sCOD), soluble Total Organic Carbon (sTOC), and soluble Total Nitrogen (sTN) released into the solution. The highest material release was achieved at an ultrasonic energy intensity of 0...
March 16, 2017: Waste Management
https://www.readbyqxmd.com/read/28318887/multi-focus-beamforming-for-thermal-strain-imaging-using-a-single-ultrasound-linear-array-transducer
#11
Man M Nguyen, Xuan Ding, Steven A Leers, Kang Kim
Ultrasound-induced thermal strain imaging (TSI) has been used successfully to identify lipid- and water-based tissues in atherosclerotic plaques in some research settings. However, TSI faces several challenges to be realized in clinics. These challenges include motion artifacts and displacement tracking accuracy, as well as limited heating capability, which contributes to low thermal strain signal-to-noise ratio, and a limited field of view. Our goal was to address the challenge in heating tissue in TSI. Current TSI systems use separate heating and imaging transducers, which require physical alignment of the heating and imaging beams and result in a bulky setup that limits in vivo operation...
March 15, 2017: Ultrasound in Medicine & Biology
https://www.readbyqxmd.com/read/28317673/effect-of-balanced-phacoemulsification-tip-on-the-outcomes-of-torsional-phacoemulsification-using-an-active-fluidics%C3%A2-system
#12
Sudarshan Khokhar, Neelima Aron, Sagnik Sen, Ganesh Pillay, Esha Agarwal
PURPOSE: To compare the outcomes of torsional phacoemulsification with a new balanced tip (Intrepid) and a conventional tip (Kelman) using a single active-fluidics torsional phacoemulsification machine (Centurion). SETTING: Dr. Rajendra Prasad Centre for Ophthalmic Sciences, All India Institute of Medical Sciences, New Delhi, India. DESIGN: Prospective comparative case-control study. METHODS: Patients with senile cataract had torsional phacoemulsification with the Kelman conventional tip or the new Intrepid balanced tip using the active-fluidics torsional machine...
January 2017: Journal of Cataract and Refractive Surgery
https://www.readbyqxmd.com/read/28316942/piezosurgery-a-boon-for-modern-periodontics
#13
REVIEW
Mathai Thomas, Uttam Akula, Kranti K R Ealla, Nirosha Gajjada
Dentistry has undergone significant advancement and has seen several changing concepts over a decade. One such novel innovation is piezosurgery. Piezoelectric bone surgery or otherwise known as piezosurgery is a novel technique invented by Professor Vercellotti in 1988 to overcome the limitations of traditional instrumentation in oral bone surgery by modifying and improving conventional ultrasound technology. It is a promising, meticulous, and soft tissue sparing system for bone cutting based on low frequency ultrasonic microvibrations...
January 2017: Journal of International Society of Preventive & Community Dentistry
https://www.readbyqxmd.com/read/28315202/validation-of-bevacizumab-therapy-effect-on-colon-cancer-subtypes-by-using-whole-body-imaging-in-mice
#14
Ivan Vuletic, Kedi Zhou, Hui Li, Huichen Bai, Xiangxi Meng, Sihao Zhu, Yichen Ding, Jun Li, Hongfang Sun, Qiushi Ren
PURPOSE: Preclinical imaging offers a useful tool for monitoring cancer biological behavior and therapy in vivo without the necessity of animal surgery. The following paper describes our examination of tumor progress and anti-angiogenic therapy with Bevacizumab on colon cancer subtypes (SW480 and SW620) by using different non-invasive real-time in vivo imaging techniques. PROCEDURES: Color Doppler ultrasound imaging (CDUI) was used to observe the formation of new blood vessels; a homemade fluorescence reflectance imaging (FRI) apparatus was mainly used to test the difference in VEGFR2 expression between the tumor subtypes...
March 17, 2017: Molecular Imaging and Biology: MIB: the Official Publication of the Academy of Molecular Imaging
https://www.readbyqxmd.com/read/28314387/twin-pregnancy-complicated-by-esophageal-atresia-duodenal-atresia-gastric-perforation-and-hypoplastic-left-heart-structures-in-one-twin-a-case-report-and-review-of-the-literature
#15
Mohamad K Abou Chaar, Mariana L Meyers, Bethany D Tucker, Henry L Galan, Kenneth W Liechty, Timothy M Crombleholme, Ahmed I Marwan
BACKGROUND: The antenatal diagnosis of a combined esophageal atresia without tracheoesophageal fistula and duodenal atresia with or without gastric perforation is a rare occurrence. These diagnoses are difficult and can be suspected on ultrasound by nonspecific findings including a small stomach and polyhydramnios. Fetal magnetic resonance imaging adds significant anatomical detail and can aid in the diagnosis of these complicated cases. Upon an extensive literature review, there are no reports documenting these combined findings in a twin pregnancy...
March 18, 2017: Journal of Medical Case Reports
https://www.readbyqxmd.com/read/28304113/partitioning-of-nanoparticle-originated-dissolved-silver-in-natural-and-artificial-sediments
#16
Juho E Rajala, Eeva-Riikka Vehniäinen, Ari Väisänen, Jussi V K Kukkonen
Sediments are believed to be a major sink for the silver nanoparticles (AgNP) in the aquatic environment, but there is a lack of knowledge about the environmental effects and behaviour of AgNP in sediments. The release of highly toxic Ag(+) through dissolution of AgNP is one mechanism leading to toxic effects in sediments. We applied an ultrasound-assisted sequential extraction method to evaluate the dissolution of AgNP and to study the partitioning of dissolved Ag in sediments. Ag was spiked into artificial (AS) and 2 natural sediments (HS, KS) as silver nitrate (AgNO3 ), uncoated AgNP (uc-AgNP), or polyvinylpyrrolidone-coated AgNP (PVP-AgNP)...
March 17, 2017: Environmental Toxicology and Chemistry
https://www.readbyqxmd.com/read/28303912/new-technologies-for-the-assessment-of-neuropathies
#17
REVIEW
Roberto Gasparotti, Luca Padua, Chiara Briani, Giuseppe Lauria
Technical advances are rapidly changing the clinical and instrumental approach to peripheral nerve diseases. Magnetic resonance neurography, diffusion tensor imaging and nerve ultrasonography are increasingly entering the diagnostic workup of peripheral neuropathies as tools that complement neurophysiology and enable investigation of proximal structures, such as plexuses and roots. Progress in the design of magnetic resonance scanners and sequences, and the development of high-frequency ultrasound probes mean that high-resolution peripheral nerve imaging is possible, enabling detailed examination of nerve size, morphology and internal fascicular structure that can integrate nerve conduction studies into clinical practice...
March 17, 2017: Nature Reviews. Neurology
https://www.readbyqxmd.com/read/28303688/patient-level-meta-analysis-of-999-claudicants-undergoing-primary-femoropopliteal-nitinol-stent-implantation
#18
Krishna J Rocha-Singh, Joshua A Beckman, Gary Ansel, Sean P Lyden, Peter Schneider, Manish Mehta, Michael Dake, Christopher M Mullin, Michael R Jaff
CONDENSED ABSTRACT: The factors that impact the clinical effectiveness of bare nitinol stents in claudicants with symptomatic femoropopliteal atherosclerosis are incompletely known. The authors analyzed variables that may influence stent durability and provide a benchmark for their effectiveness. Data analyzed from six studies (999 patients) included baseline noninvasive hemodynamic tests, angiographic characteristics, ultrasound defined stent patency and target lesion revascularization through 12-months...
March 17, 2017: Catheterization and Cardiovascular Interventions
https://www.readbyqxmd.com/read/28303674/simultaneous-recording-of-ultrasound-and-polysomnography-during-natural-sleep-in-patients-with-obstructive-sleep-apnea-a-pilot-study
#19
Jeng-Wen Chen, Chih-Chung Huang, Chi-Kai Weng, Chun-Hsiang Chang, Shou-Jen Wang
Tongue base deformation may play a critical role in the phenomenon of obstructive sleep apnea, but polysomnography provides limited information regarding the effect of tongue motion during natural sleep. We reported on preliminary results of combining a novel ultrasound system and polysomnography for simultaneous recordings during natural sleep in volunteers and patients with obstructive sleep apnea. All participants underwent time-synchronized polysomnography and submental transcutaneous ultrasound examinations...
March 17, 2017: Journal of Sleep Research
https://www.readbyqxmd.com/read/28303659/invasive-characterization-of-atherosclerotic-plaque-in-patients-with-peripheral-arterial-disease-using-near-infrared-spectroscopy-intravascular-ultrasound
#20
Amr E Abbas, Sibin K Zacharias, James A Goldstein, Ivan D Hanson, Robert D Safian
OBJECTIVES: We describe the characteristics of atherosclerotic plaque in patients with peripheral arterial disease (PAD) using near-infrared spectroscopy-intravascular ultrasound (NIRS-IVUS) BACKGROUND: Imaging and autopsy studies have described atherosclerotic plaque in different vascular beds, including varying degrees of lipid, fibrosis, and calcification. Recently, NIRS has been validated as an accurate method for detecting lipid-core plaque (LCP) in the coronary circulation. Invasive evaluation of plaque composition using NIRS-IVUS has not been reported in different peripheral arterial circulations...
March 17, 2017: Catheterization and Cardiovascular Interventions
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