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https://www.readbyqxmd.com/read/28799434/metabolic-biomarkers-and-gallstone-disease-a-population-based-study
#1
Daniel Mønsted Shabanzadeh, Tea Skaaby, Lars Tue Sørensen, Jesper Eugen-Olsen, Torben Jørgensen
OBJECTIVES: The objectives for this study were to examine the associations between metabolic biomarkers of obesity including insulin resistance, vascular dysfunction, systemic inflammation, genetic susceptibility and ultrasound proven gallstone disease or cholecystectomy in a population-based cross-sectional study. MATERIAL AND METHODS: A total of 2650 participants were included, of whom 422 had gallstone disease. Associations between selected metabolic biomarkers and gallstone disease were estimated by multivariable logistic regression models and expressed as odds ratio (OR) and 95% confidence interval (CI)...
August 11, 2017: Scandinavian Journal of Gastroenterology
https://www.readbyqxmd.com/read/28795530/construction-of-silica-based-micro-nanoplatforms-for-ultrasound-theranostic-biomedicine
#2
REVIEW
Yang Zhou, Xiaoxia Han, Xiangxiang Jing, Yu Chen
Ultrasound (US)-based biomedicine has been extensively explored for its applications in both diagnostic imaging and disease therapy. The fast development of theranostic nanomedicine significantly promotes the development of US-based biomedicine. This progress report summarizes and discusses the recent developments of rational design and fabrication of silica-based micro/nanoparticles for versatile US-based biomedical applications. The synthetic strategies and surface-engineering approaches of silica-based micro/nanoparticles are initially discussed, followed by detailed introduction on their US-based theranostic applications...
August 10, 2017: Advanced Healthcare Materials
https://www.readbyqxmd.com/read/28783626/fast-and-fully-automatic-left-ventricular-segmentation-and-tracking-in-echocardiography-using-shape-based-b-spline-explicit-active-surfaces
#3
Joao Pedrosa, Sandro Queiros, Olivier Bernard, Jan Engvall, Thor Edvardsen, Eike Nagel, Jan Dhooge
Cardiac volume/function assessment remains a critical step in daily cardiology and 3D ultrasound plays an increasingly important role. Fully automatic left ventricular segmentation is, however, a challenging task due to the artifacts and low contrast-to-noise ratio of ultrasound imaging. In the present work, a fast and fully automatic framework for full cycle endocardial left ventricle segmentation is proposed. This approach couples the advantages of the B-spline explicit active surfaces framework, a purely image information approach, to those of statistical shape models to give prior information about the expected shape for an accurate segmentation...
August 2, 2017: IEEE Transactions on Medical Imaging
https://www.readbyqxmd.com/read/28776139/catching-the-zebra-clinical-pearls-and-pitfalls-for-the-successful-diagnosis-of-zollinger-ellison-syndrome
#4
REVIEW
Aaron H Mendelson, Mark Donowitz
Zollinger-Ellison syndrome (ZES) results from an ectopic gastrin-secreting tumor leading to peptic ulcer disease, reflux, and chronic diarrhea. While early recognition portends an excellent prognosis with >80% survival at 15 years, symptoms are often nonspecific making the diagnosis difficult to establish. Diagnosis involves a series of tests, including fasting gastrin, gastric pH, chromogranin A, and secretin stimulation. Performing these tests in the correct sequence and at the proper time is essential to avoid inaccurate results...
August 3, 2017: Digestive Diseases and Sciences
https://www.readbyqxmd.com/read/28771407/imaging-strategies-for-suspected-acute-cranial-shunt-failure-a-cost-effectiveness-analysis
#5
Jay Pershad, Andrew Taylor, M Kennedy Hall, Paul Klimo
OBJECTIVES: We compared cost-effectiveness of cranial computed tomography (CT), fast sequence magnetic resonance imaging (fsMRI), and ultrasonography measurement of optic nerve sheath diameter (ONSD) for suspected acute shunt failure from the perspective of a health care organization. METHODS: We modeled 4 diagnostic imaging strategies: (1) CT scan, (2) fsMRI, (3) screening ONSD by using point of care ultrasound (POCUS) first, combined with CT, and (4) screening ONSD by using POCUS first, combined with fsMRI...
August 2017: Pediatrics
https://www.readbyqxmd.com/read/28767478/a-case-report-on-ultrasound-guided-serratus-plane-block-and-fast-track-tracheal-extubation-in-the-operating-room-for-thoracic-trauma-patients-is-it-possible
#6
Pierfrancesco Fusco, Paolo Scimia, Stefano Di Carlo, Ambra Testa, Antonio Luciani, Emiliano Petrucci, Franco Marinangeli
Painful rib fractures may be a factor in trauma patients remaining intubated and being given postoperative mechanical ventilation after emergency surgery. Regional techniques could provide sufficient analgesia in these patients to enable weaning and extubation and thus prevent or minimize complications related to prolonged ventilatory support. We describe a trauma patient with multiple rib fractures requiring an emergency splenectomy for whom an ultrasound-guided serratus plane block provided good quality pain relief for his rib fractures and enabled fast-track extubation in the operating room...
August 1, 2017: A & A Case Reports
https://www.readbyqxmd.com/read/28767367/3-d-in-vitro-acoustic-super-resolution-and-super-resolved-velocity-mapping-using-microbubbles
#7
Kirsten Christensen-Jeffries, Jemma Brown, Paul Aljabar, Mengxing Tang, Christopher Dunsby, Robert J Eckersley
Standard clinical ultrasound (US) imaging frequencies are unable to resolve microvascular structures due to the fundamental diffraction limit of US waves. Recent demonstrations of 2D super-resolution both in vitro and in vivo have demonstrated that fine vascular structures can be visualized using acoustic single bubble localization. Visualization of more complex and disordered 3D vasculature, such as that of a tumor, requires an acquisition strategy which can additionally localize bubbles in the elevational plane with high precision in order to generate super-resolution in all three dimensions...
July 31, 2017: IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control
https://www.readbyqxmd.com/read/28766304/benefits-of-ultrasound-guided-transversus-abdominis-plane-block-for-open-appendectomy-in-children
#8
Ilona Batko, Barbara K Kościelniak, Ilona Al-Mutari, Krzysztof Kobylarz
BACKGROUND: One of the most frequently performed emergency surgical procedures in children is an appendectomy. The aim of this study was to determine the benefits of supplementing standard, general anaesthesia with the ultrasound-guided right TAP block. METHODS: We analyzed the medical records of 90 children of both sexes, aged 4-16 years with a body mass of 16-78 kg who underwent general anaesthesia for open appendectomy. Sixty-two individuals were anaesthetized using the standard method, while 28 patients had an additional right-sided TAP block under ultrasound guidance...
2017: Anaesthesiology Intensive Therapy
https://www.readbyqxmd.com/read/28764941/biopsy-needle-tracking-technique-in-us-images
#9
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/28764084/determination-of-antimony-and-tin-in-beverages-using-inductively-coupled-plasma-optical-emission-spectrometry-after-ultrasound-assisted-ionic-liquid-dispersive-liquid-liquid-phase-microextraction
#10
N Raphael Biata, Luthando Nyaba, James Ramontja, Nomvano Mketo, Philiswa N Nomngongo
The aim of this study was to develop a simple and fast ultrasound-assisted ionic liquid dispersive liquid-liquid phase microextraction (UA-IL-DLLME) method for preconcetration of trace antimony and tin in beverage samples. The novelty of this study was based on the application of ligandless UA-IL-DLLME using low-density ionic liquid and organic solvents for preconcentration of Sb and Sn. The concentration of Sb and Sn were quantified using ICP-OES. Under the optimum conditions, the calibration graph was found to be LOQ-250µgL(-1) (r(2)=0...
December 15, 2017: Food Chemistry
https://www.readbyqxmd.com/read/28764063/hard-cap-espresso-extraction-and-liquid-chromatography-determination-of-bioactive-compounds-in-vegetables-and-spices
#11
María Teresa Martinez-Sena, Miguel de la Guardia, Francesc A Esteve-Turrillas, Sergio Armenta
A new analytical procedure, based on liquid chromatography with diode array and fluorescence detection, has been proposed for the determination of bioactive compounds in vegetables and spices after hard cap espresso extraction. This novel extraction system has been tested for the determination of capsaicin and dihydrocapsaicin from fresh chilli and sweet pepper, piperine from ground pepper, curcumin from turmeric and curry, and myristicin from nutmeg. Extraction efficiency was evaluated by using acetonitrile:water and ethanol:water mixtures...
December 15, 2017: Food Chemistry
https://www.readbyqxmd.com/read/28764000/direct-immersion-single-drop-micro-extraction-method-for-multi-class-pesticides-analysis-in-mango-using-gc-ms
#12
Norma S Pano-Farias, Silvia G Ceballos-Magaña, Roberto Muñiz-Valencia, Jose M Jurado, Ángela Alcázar, Ismael A Aguayo-Villarreal
Due the negative effects of pesticides on environment and human health, more efficient and environmentally friendly methods are needed. In this sense, a simple, fast, free from memory effects and economical direct-immersion single drop micro-extraction (SDME) method and GC-MS for multi-class pesticides determination in mango samples was developed. Sample pre-treatment using ultrasound-assisted solvent extraction and factors affecting the SDME procedure (extractant solvent, drop volume, stirring rate, ionic strength, time, pH and temperature) were optimized using factorial experimental design...
December 15, 2017: Food Chemistry
https://www.readbyqxmd.com/read/28763631/an-ultra-effective-method-of-generating-extramultipotent-cells-from-human-fibroblasts-by-ultrasound
#13
Yong Seung Lee, Hyejung Heo, Jonghwan Lee, Sung Ung Moon, Woon Yong Jung, Yong Keun Park, Min Geun Park, Seung-Hun Oh, Soonhag Kim
Multipotent cells have similar basic features of all stem cells but limitation in ability of self-renewal and differentiation compared with pluripotent cells. Here, we have developed an ultra effective, gene- and chemical-free method of generating extra multipotent (xpotent) cells which have differentiation potential more than limited cell types, by the mechanism of ultrasound-directed permeation of environmental transition-guided cellular reprogramming (Entr). Ultrasound stimulus generated a massive number of Entr-mediated xpotent (x/Entr) spheroids from human dermal fibroblasts (HDFs) 6 days after treatment...
July 25, 2017: Biomaterials
https://www.readbyqxmd.com/read/28761048/optoacoustic-micro-tomography-at-100-volumes-per-second
#14
X Luís Deán-Ben, Hernán López-Schier, Daniel Razansky
Optical microscopy remains a fundamental tool for modern biological discovery owing to its excellent spatial resolution and versatile contrast in visualizing cellular and sub-cellular structures. Yet, the time domain is paramount for the observation of biological dynamics in living systems. Commonly, acquisition of microscopy data involves scanning of a spherically- or cylindrically-focused light beam across the imaged volume, which significantly limits temporal resolution in 3D. Additional complications arise from intense light scattering of biological tissues, further restraining the effective penetration depth and field of view of optical microscopy techniques...
July 31, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28755147/meta-analysis-of-tumour-burden-in-pre-operative-axillary-ultrasound-positive-and-negative-breast-cancer-patients
#15
REVIEW
Muneer Ahmed, F Jozsa, R Baker, I T Rubio, J Benson, M Douek
BACKGROUND: Management of the axilla in breast cancer is becoming increasingly conservative. Patients identified with a low axillary nodal burden (two or fewer involved nodes) at sentinel node biopsy (SNB) can avoid completion axillary node clearance (cANC). 'Fast track' to ANC in patients with involved nodes on pre-operative ultrasound may be over-treating a subgroup of these patients with low nodal burden, which would have precluded their need for ANC. This systematic review assesses the proportion of patients with involved nodes on pre-operative axillary ultrasound, which would fit low axillary burden criteria...
July 28, 2017: Breast Cancer Research and Treatment
https://www.readbyqxmd.com/read/28752731/cardiac-imaging-in-patients-with-dyspnea
#16
Pierfranco Dellavesa, Federico Nardi
Acute dyspnea is a frequent cause of access to the Discharge Department (DEA); Differentiation between cardiogenic and respiratory causes does not always seem simple and certain, causing a delay in initiating targeted therapies and prolonging the Patient's stay in the emergency department. The basic elements for the diagnosis remain the history and the objective examination, supplemented by the execution of an electrocardiogram, a determination of blood parameters and the execution of a chest X-ray. The limits of radiological semeiotics, related to a low sensitivity to high specificity, promote other methods available to the physician of First Aid...
July 27, 2017: Minerva Cardioangiologica
https://www.readbyqxmd.com/read/28749348/fast-simulation-of-dynamic-ultrasound-images-using-the-gpu
#17
Sigurd Storve, Hans Torp
Simulated ultrasound data is a valuable tool for development and validation of quantitative image analysis methods in echocardiography. Unfortunately, simulation time can become prohibitive for phantoms consisting of a large number of point-scatterers. The COLE algorithm by Gao et al. is a fast convolution-based simulator that trades simulation accuracy for improved speed. We present highly efficient parallelized CPU- and GPU-implementations of the COLE algorithm with an emphasis on dynamic simulations involving moving pointscatterers...
July 25, 2017: IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control
https://www.readbyqxmd.com/read/28749262/mycobacterium-intracellulare-infection-causing-a-retroperitoneal-mass-in-a-binturong-arctictis-binturong
#18
Laura Adamovicz, Suzanne Kennedy-Stoskopf, Ashley Talley, John M Cullen, Eli B Cohen, Petra Bizikova, Vanessa Grunkemeyer
A 19-yr-old castrated male binturong ( Arctictis binturong ) with a history of recurrent pyogranulomatous panniculitis, lymphangitis, and dermatitis was presented for evaluation of hyporexia and tenesmus. A large caudal abdominal mass was palpated on physical examination. On ultrasound, the mass encircled and obstructed the left ureter, resulting in hydroureter and hydronephrosis. The animal was euthanized, and necropsy revealed a large retroperitoneal pyogranuloma with acid-fast organisms identified in both the mass and the perineal skin...
June 2017: Journal of Zoo and Wildlife Medicine: Official Publication of the American Association of Zoo Veterinarians
https://www.readbyqxmd.com/read/28749165/impact-of-robotic-ultrasound-image-guidance-on-plan-quality-in-sbrt-of-the-prostate
#19
Stefan Gerlach, Ivo Kuhlemann, Floris Ernst, Christoph Fürweger, Alexander Schlaefer
OBJECTIVES: Ultrasound provides good image quality, fast volumetric imaging, and is established for abdominal image guidance. Robotic transducer placement may facilitate intra-fractional motion compensation in radiation therapy. We consider integration with the CyberKnife and study whether the kinematic redundancy of a seven-degrees-of-freedom robot allows for acceptable plan quality for prostate treatments. METHODS: Reference treatment plans were generated for ten prostate cancer cases previously treated with the CyberKnife...
July 27, 2017: British Journal of Radiology
https://www.readbyqxmd.com/read/28742052/a-semi-analytical-model-of-time-reversal-cavity-for-high-amplitude-focused-ultrasound-applications
#20
Justine Robin, Mickael Tanter, Mathieu Pernot
Time reversal cavities (TRC) have been proposed as an efficient approach for 3D ultrasound therapy. They indeed allow precise spatio-temporal focusing of high power ultrasound pulses within a large region of interest with a low number of transducers. Leaky TRCs are usually built by placing a multiple scattering medium such as a random rods forest in a reverberating cavity, and the final peak pressure gain of the device only depends on the temporal length of its impulse response. Such multiple scattering in a reverberating cavity is a complex phenomenon, and the optimization of the device's gain is usually a cumbersome process, mostly empirical, and requiring numerical simulations with extremely long computational times...
July 25, 2017: Physics in Medicine and Biology
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