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https://www.readbyqxmd.com/read/28633841/novel-approaches-based-on-ultrasound-for-treatment-of-wastewater-containing-potassium-ferrocyanide
#1
Rajashree H Jawale, Akash Tandale, Parag R Gogate
Industrial wastewaters containing biorefractory compounds like cyanide offer significant environmental problems attributed to the fact that the conventional methods have limited effectiveness and hence developing efficient treatment approaches is an important requirement. The present work investigates the use of novel treatment approach of ultrasound (US) combined with advanced oxidation techniques for the degradation of potassium ferrocyanide (KFC) for the first time. An ultrasonic bath equipped with longitudinal horn (1kW rated power and 25kHz frequency) has been used...
September 2017: Ultrasonics Sonochemistry
https://www.readbyqxmd.com/read/28633808/impact-of-mr-guided-boiling-histotripsy-in-distinct-murine-tumor-models
#2
Martijn Hoogenboom, Dylan C Eikelenboom, Renske J E van den Bijgaart, Arend Heerschap, Pieter Wesseling, Martijn H den Brok, Jurgen J Fütterer, Gosse J Adema
Interest in mechanical high intensity focused ultrasound (HIFU) ablation is rapidly growing. Boiling histotripsy (BH) is applied for mechanical fragmentation of soft tissue into submicron fragments with limited temperature increase using the shock wave and cavitation effects of HIFU. Research on BH has been largely limited to ex vivo experiments. As a consequence, the in vivo pathology after BH treatment and the relation to preexistent tissue characteristics are not well understood. This study reports on in vivo MR guided BH treatment, either with 100 or 200 pulses per focal spot, in three different subcutaneous mouse tumor models: a soft-tissue melanoma (B16OVA), a compact growing thymoma (EL4), and a highly vascularized neuroblastoma (9464D)...
September 2017: Ultrasonics Sonochemistry
https://www.readbyqxmd.com/read/28631853/high-sensitivity-mr-acoustic-radiation-force-imaging-using-transition-band-balanced-steady-state-free-precession
#3
Yuan Zheng, Michael Marx, G Wilson Miller, Kim Butts Pauly
PURPOSE: MR acoustic radiation force imaging (MR-ARFI) provides a method to visualize the focal spot of a focused ultrasound (FUS) beam without introducing a significant temperature rise. With conventional spoiled MR-ARFI pulse sequences, the ARFI phase always equals the motion-encoded phase. In this work, MR-ARFI using transition band balanced steady-state free precession (bSSFP) is presented, which improves the sensitivity of MR-ARFI with high acquisition speed. THEORY AND METHODS: Motion-encoding gradients (MEG) are inserted into bSSFP sequences for MR-ARFI...
June 20, 2017: Magnetic Resonance in Medicine: Official Journal of the Society of Magnetic Resonance in Medicine
https://www.readbyqxmd.com/read/28631451/accuracy-of-transcutaneous-laryngeal-ultrasound-for-detecting-vocal-cord-paralysis-in-the-immediate-postoperative-period-after-total-thyroidectomy
#4
Marcos de Miguel, Eva M Peláez, Enric Caubet, Óscar González, Mercedes Velasco, Lidia Rigual
BACKGROUND: Transcutaneous laryngeal ultrasound (TLUS) has emerged as a promising imaging tool for vocal cord examination in patients undergoing thyroid surgery. The focus of this prospective, double-blind study was to assess the accuracy of TLUS in the diagnosis of vocal cord paralysis in the immediate postoperative period following total thyroidectomy. METHODS: The study included 93 patients undergoing total thyroidectomy and assessed by videostrobolaryngoscopy (VSL) and TLUS...
June 14, 2017: Minerva Anestesiologica
https://www.readbyqxmd.com/read/28630749/imaging-in-peri-prosthetic-assessment-an-orthopaedic-perspective
#5
Christoph H Lohmann, Sanjiv Rampal, Martin Lohrengel, Gurpal Singh
As imaging techniques are ever-evolving, this article aims to provide a brief overview of the various modalities including their limitations. The ability of imaging for evaluation of implant osseo-integration will be addressed and also the role of imaging in assessing septic and aseptic loosening, with a particular focus on adverse tissue reactions, will be discussed. Specific features when imaging the big joints such as shoulder, hip, knee and ankle joint will also be outlined.Overall, a lack of standardisation and validity was noted and despite the gross variety of imaging modalities, there is no technique covering all aspects required for evaluation of implant fixation and septic and aseptic loosening...
May 2017: EFORT open reviews
https://www.readbyqxmd.com/read/28627331/dynamic-transmit-receive-beamforming-by-spatial-matched-filtering-for-ultrasound-imaging-with-plane-wave-transmission
#6
Yuling Chen, Yang Lou, Jesse Yen
During conventional ultrasound imaging, the need for multiple transmissions for one image and the time of flight for a desired imaging depth limit the frame rate of the system. Using a single plane wave pulse during each transmission followed by parallel receive processing allows for high frame rate imaging. However, image quality is degraded because of the lack of transmit focusing. Beamforming by spatial matched filtering (SMF) is a promising method which focuses ultrasonic energy using spatial filters constructed from the transmit-receive impulse response of the system...
July 2017: Ultrasonic Imaging
https://www.readbyqxmd.com/read/28626862/acoustic-field-characterization-of-a-clinical-magnetic-resonance-guided-high-intensity-focused-ultrasound-system-inside-the-magnet-bore
#7
Satya V V N Kothapalli, Michael B Altman, Ari Partanen, Leighton Wan, H Michael Gach, William Straube, Dennis E Hallahan, Hong Chen
PURPOSE: With the expanding clinical application of magnetic resonance-guided high intensity focused ultrasound (MR-HIFU), acoustic field characterization of MR-HIFU systems is needed for facilitating regulatory approval and ensuring consistent and safe power output of HIFU transducers. However, the established acoustic field measurement techniques typically use equipment that cannot be used in a magnetic resonance imaging (MRI) suite, thus posing a challenge to the development and execution of HIFU acoustic field characterization techniques...
June 19, 2017: Medical Physics
https://www.readbyqxmd.com/read/28626115/reappraisal-of-cyst-fluid-only-on-thyroid-fine-needle-aspiration-cytology
#8
Nami Takada, Mitsuyoshi Hirokawa, Ayana Suzuki, Miyoko Higuchi, Seiji Kuma, Akira Miyauchi
According to the Bethesda System for Reporting Thyroid Cytopathology (BSRTC), cyst fluid only (CFO) cases are classified in the non-diagnostic category. To date, no large study focusing on CFO has been conducted. To reassess the diagnostic significance of CFO, we compared CFO nodules with non-diagnostic nodules excluding CFO (ND-other). We reviewed the conventional thyroid smears of 715 CFO and 766 ND-other nodules. We compared the timing of and findings at re-aspiration, the histology of resected specimens, and the proportion of malignant nodules between the two groups...
June 13, 2017: Endocrine Journal
https://www.readbyqxmd.com/read/28625958/pain-management-of-pancreatic-cancer-patients-with-high-intensity-focused-ultrasound-therapy
#9
Yulan Shi, Xiao Ying, Xiaoye Hu, Hong Shen
This study was performed to evaluate cancer pain control of high-Intensity focused ultrasound ablation (HIFU) and to manage the HIFU treatment pain in advanced pancreatic cancer patients with analgesics. We collected 71 locally advanced pancreatic cancer patients treated with HIFU from 2013 March to 2014 January in our hospital. The cancer pain (pre-HIFU and two weeks after HIFU) and HIFU treatment pain were evaluated respectively. The numeric rating scale (NRS) was used as the tool of pain evaluation. The related factors with pains were analyzed...
January 2017: Pakistan Journal of Pharmaceutical Sciences
https://www.readbyqxmd.com/read/28625217/the-core-emergency-ultrasound-curriculum-project-a-report-from-the-curriculum-working-group-of-the-caep-emergency-ultrasound-committee
#10
Paul Olszynski, Dan Kim, Jordan Chenkin, Louise Rang
Emergency ultrasound (EUS) is now widely considered to be a "skill integral to the practice of emergency medicine." 1 The Canadian Association of Emergency Physicians (CAEP) initially issued a position statement in 1999 supporting the availability of focused ultrasound 24 hours per day in the emergency department (ED). 2.
June 19, 2017: CJEM
https://www.readbyqxmd.com/read/28624924/evaluation-of-hepatic-fibrosis-a-review-from-the-society-of-abdominal-radiology-disease-focus-panel
#11
REVIEW
Jeanne M Horowitz, Sudhakar K Venkatesh, Richard L Ehman, Kartik Jhaveri, Patrick Kamath, Michael A Ohliger, Anthony E Samir, Alvin C Silva, Bachir Taouli, Michael S Torbenson, Michael L Wells, Benjamin Yeh, Frank H Miller
Hepatic fibrosis is potentially reversible; however early diagnosis is necessary for treatment in order to halt progression to cirrhosis and development of complications including portal hypertension and hepatocellular carcinoma. Morphologic signs of cirrhosis on ultrasound (US), computed tomography (CT), and magnetic resonance imaging (MRI) alone are unreliable and are seen with more advanced disease. Newer imaging techniques to diagnose liver fibrosis are reliable and accurate, and include magnetic resonance elastography and US elastography (one-dimensional transient elastography and point shear wave elastography or acoustic radiation force impulse imaging)...
June 17, 2017: Abdominal Radiology
https://www.readbyqxmd.com/read/28624916/interethnic-variation-in-pelvic-floor-morphology-in-women-with-symptomatic-pelvic-organ-prolapse
#12
Zeelha Abdool, Hans Peter Dietz, Barend Gerhardus Lindeque
INTRODUCTION AND HYPOTHESIS: There is a lack of epidemiological studies evaluating female pelvic organ prolapse in developing countries. Current studies have largely focused on women of white ethnicity. This study was designed to determine interethnic variation in pelvic floor functional anatomy, namely, levator hiatal distensibility and pelvic organ descent, in women with symptomatic pelvic organ prolapse in a multi-ethnic South African population. METHODS: This prospective observational study included 258 consecutive women referred for pelvic organ prolapse assessment and management at a tertiary urogynaecological clinic...
June 17, 2017: International Urogynecology Journal
https://www.readbyqxmd.com/read/28624705/controlled-release-of-basic-fibroblast-growth-factor-for-angiogenesis-using-acoustically-responsive-scaffolds
#13
Alexander Moncion, Melissa Lin, Eric G O'Neill, Renny T Franceschi, Oliver D Kripfgans, Andrew J Putnam, Mario L Fabiilli
The clinical translation of pro-angiogenic growth factors for treatment of vascular disease has remained a challenge due to safety and efficacy concerns. Various approaches have been used to design spatiotemporally-controlled delivery systems for growth factors in order to recapitulate aspects of endogenous signaling and thus assist in translation. We have developed acoustically-responsive scaffolds (ARSs), which are fibrin scaffolds doped with a payload-containing, sonosensitive emulsion. Payload release can be controlled non-invasively and in an on-demand manner using focused, megahertz-range ultrasound (US)...
June 9, 2017: Biomaterials
https://www.readbyqxmd.com/read/28624176/moderate-enhancement-in-tissue-permeability-by-preclinical-focused-ultrasound
#14
EDITORIAL
Kinam Park
No abstract text is available yet for this article.
June 28, 2017: Journal of Controlled Release: Official Journal of the Controlled Release Society
https://www.readbyqxmd.com/read/28623995/rationale-design-and-methodology-of-the-observational-insights-svt-study-on-the-current-state-of-care-and-outcomes-of-patients-with-superficial-vein-thrombosis
#15
Rupert Bauersachs, Horst Eberhard Gerlach, Andreas Heinken, Ulrich Hoffmann, Florian Langer, Thomas Noppeney, David Pittrow, Jens Klotsche, Eberhard Rabe
OBJECTIVE: Superficial vein thrombosis (SVT) is a common disease in clinical practice. In terms of pathophysiology and outcomes, the condition is related to venous thromboembolism, bearing a potential for severe thromboembolic complications if it is not treated adequately. A wide range of treatment approaches (including oral and injectable anticoagulants, pain medication, nondrug therapy including compression therapy, and no treatment at all) are applied in clinical practice, but there is sparse information about selection of patients for therapies, current treatment pathways, and drug use as well as outcomes...
July 2017: Journal of Vascular Surgery. Venous and Lymphatic Disorders
https://www.readbyqxmd.com/read/28623905/educational-standards-for-training-paramedics-in-ultrasound-a-scoping-review
#16
Ben Meadley, Alexander Olaussen, Ashleigh Delorenzo, Nick Roder, Caroline Martin, Toby St Clair, Andrew Burns, Emma Stam, Brett Williams
BACKGROUND: Paramedic-performed out-of-hospital ultrasound is a novel skill that has gained popularity in some services in recent years. In this setting point-of care ultrasound (POCUS) can provide additional information that can assist with management and guide transport to the most appropriate facility. We sought to explore the different educational approaches used for training paramedics in ultrasound in the out-of-hospital setting. METHODS: Ovid MEDLINE, EMBASE, EBM Reviews, The Cochrane Library, CINAHL plus, The Monash University Research Repository and the British Thesis Library were searched from the 1(st) of January 1990 to the 6(th) of April 2016...
June 17, 2017: BMC Emergency Medicine
https://www.readbyqxmd.com/read/28623369/looking-beyond-the-imaging-plane-3d-needle-tracking-with-a-linear-array-ultrasound-probe
#17
Wenfeng Xia, Simeon J West, Malcolm C Finlay, Jean-Martial Mari, Sebastien Ourselin, Anna L David, Adrien E Desjardins
Ultrasound is well suited for guiding many minimally invasive procedures, but its use is often precluded by the poor visibility of medical devices. When devices are not visible, they can damage critical structures, with life-threatening complications. Here, we developed the first ultrasound probe that comprises both focused and unfocused transducer elements to provide both 2D B-mode ultrasound imaging and 3D ultrasonic needle tracking. A fibre-optic hydrophone was integrated into a needle to receive Golay-coded transmissions from the probe and these data were processed to obtain tracking images of the needle tip...
June 16, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28620685/the-efficacy-of-a-new-high-intensity-focused-ultrasound-therapy-for-locally-advanced-pancreatic-cancer
#18
Jing Zhao, Fuguang Zhao, Yulan Shi, Yongchuan Deng, Xiaoye Hu, Hong Shen
PURPOSE: To compare the survival benefit and safety of the low power cumulative and traditional high intensity focused ultrasound (HIFU) for locally advanced pancreatic cancer. METHOD: We retrospectively analyzed 38 patients with locally advanced, inoperable, stage III pancreatic patients received HIFU treatment between January 2008 and April 2014 in the Department of Surgery, the Second Affiliated Hospital, Zhejiang University, School of Medicine. 11 of them received the low power cumulative HIFU treatment, while other 27 received the traditional HIFU treatment...
June 15, 2017: Journal of Cancer Research and Clinical Oncology
https://www.readbyqxmd.com/read/28618832/broadband-focusing-of-underwater-sound-using-a-transparent-pentamode-lens
#19
Xiaoshi Su, Andrew N Norris, Colby W Cushing, Michael R Haberman, Preston S Wilson
An inhomogeneous acoustic metamaterial lens based on spatial variation of refractive index for broadband focusing of underwater sound is reported. The index gradient follows a modified hyperbolic secant profile designed to reduce aberration and suppress side lobes. The gradient index (GRIN) lens is comprised of transversely isotropic hexagonal microstructures with tunable quasi-static bulk modulus and mass density. In addition, the unit cells are impedance-matched to water and have in-plane shear modulus negligible compared to the effective bulk modulus...
June 2017: Journal of the Acoustical Society of America
https://www.readbyqxmd.com/read/28618821/low-intensity-ultrasound-activates-vestibular-otolith-organs-through-acoustic-radiation-force
#20
M M Iversen, D A Christensen, D L Parker, H A Holman, J Chen, M J Frerck, R D Rabbitt
The present study examined the efficacy of 5 MHz low-intensity focused ultrasound (LiFU) as a stimulus to remotely activate inner ear vestibular otolith organs. The otolith organs are the primary sensory apparati responsible for detecting orientation of the head relative to gravity and linear acceleration in three-dimensional space. These organs also respond to loud sounds and vibration of the temporal bone. The oyster toadfish, Opsanus tau, was used to facilitate unobstructed acoustic access to the otolith organs in vivo...
June 2017: Journal of the Acoustical Society of America
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