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https://www.readbyqxmd.com/read/28934809/ct-and-mri-techniques-for-imaging-around-orthopedic-hardware
#1
Thuy Duong Do, Reto Sutter, Stephan Skornitzke, Marc-André Weber
Orthopedic hardware impairs image quality in cross-sectional imaging. With an increasing number of orthopedic implants in an aging population, the need to mitigate metal artifacts in computed tomography and magnetic resonance imaging is becoming increasingly relevant. This review provides an overview of the major artifacts in CT and MRI and state-of-the-art solutions to improve image quality. All steps of image acquisition from device selection, scan preparations and parameters to image post-processing influence the magnitude of metal artifacts...
September 21, 2017: RöFo: Fortschritte Auf Dem Gebiete der Röntgenstrahlen und der Nuklearmedizin
https://www.readbyqxmd.com/read/28934806/radiation-exposure-during-uterine-fibroid-embolization-ufe-a-confounder-controlled-comparison-between-a-state-of-the-art-angiography-unit-and-a-conventional-angiography-unit
#2
Christof-Matthias Sommer, Wieland Voigt, Michel Klapp Oliger, Christopher L Schlett, Stefan Erpenbach, Katrina Thomas, Andreas Hatopp, Patrick Kurz, Goetz M Richter
Purpose To compare radiation exposure of a state-of-the-art and a conventional angiography unit in patients undergoing uterine fibroid embolization (UFE). Materials and Methods Between January 2009 and December 2016, 286 patients underwent UFE in our Interdisciplinary Fibroid Center. The inclusion criteria for this retrospective analysis were first-time transarterial embolization for symptomatic fibroids, bilateral embolization, procedures applying a state-of-the-art (Group 1) or a conventional angiography unit (Group 2), and bilateral technical success with an adequate embolization endpoint after the injection of microspheres...
September 21, 2017: RöFo: Fortschritte Auf Dem Gebiete der Röntgenstrahlen und der Nuklearmedizin
https://www.readbyqxmd.com/read/28934697/detection-of-bcg-bacteria-using-a-magnetoresistive-biosensor-a-step-towards-a-fully-electronic-platform-for-tuberculosis-point-of-care-detection
#3
Teresa G Barroso, Rui C Martins, Elisabete Fernandes, Susana Cardoso, José Rivas, Paulo P Freitas
Tuberculosis is one of the major public health concerns. This highly contagious disease affects more than 10.4 million people, being a leading cause of morbidity by infection. Tuberculosis is diagnosed at the point-of-care by the Ziehl-Neelsen sputum smear microscopy test. Ziehl-Neelsen is laborious, prone to human error and infection risk, with a limit of detection of 10(4) cells/mL. In resource-poor nations, a more practical test, with lower detection limit, is paramount. This work uses a magnetoresistive biosensor to detect BCG bacteria for tuberculosis diagnosis...
September 6, 2017: Biosensors & Bioelectronics
https://www.readbyqxmd.com/read/28934308/devices-and-tasks-involved-in-the-objective-assessment-of-standing-dynamic-balancing-a-systematic-literature-review
#4
Bálint Petró, Alexandra Papachatzopoulou, Rita M Kiss
BACKGROUND: Static balancing assessment is often complemented with dynamic balancing tasks. Numerous dynamic balancing assessment methods have been developed in recent decades with their corresponding balancing devices and tasks. OBJECTIVE: The aim of this systematic literature review is to identify and categorize existing objective methods of standing dynamic balancing ability assessment with an emphasis on the balancing devices and tasks being used. DATA SOURCES: Three major scientific literature databases (Science Direct, Web of Science, PLoS ONE) and additional sources were used...
2017: PloS One
https://www.readbyqxmd.com/read/28934283/grading-of-invasive-breast-carcinoma-through-grassmannian-vlad-encoding
#5
Kosmas Dimitropoulos, Panagiotis Barmpoutis, Christina Zioga, Athanasios Kamas, Kalliopi Patsiaoura, Nikos Grammalidis
In this paper we address the problem of automated grading of invasive breast carcinoma through the encoding of histological images as VLAD (Vector of Locally Aggregated Descriptors) representations on the Grassmann manifold. The proposed method considers each image as a set of multidimensional spatially-evolving signals that can be efficiently modeled through a higher-order linear dynamical systems analysis. Subsequently, each H&E (Hematoxylin and Eosin) stained breast cancer histological image is represented as a cloud of points on the Grassmann manifold, while a vector representation approach is applied aiming to aggregate the Grassmannian points based on a locality criterion on the manifold...
2017: PloS One
https://www.readbyqxmd.com/read/28934236/automated-computer-assisted-quantitative-analysis-of-intact-murine-lungs-at-the-alveolar-scale
#6
Goran Lovric, Ioannis Vogiatzis Oikonomidis, Rajmund Mokso, Marco Stampanoni, Matthias Roth-Kleiner, Johannes C Schittny
Using state-of-the-art X-ray tomographic microscopy we can image lung tissue in three dimensions in intact animals down to a micrometer precision. The structural complexity and hierarchical branching scheme of the lung at this level of details, however, renders the extraction of biologically relevant quantities particularly challenging. We have developed a methodology for a detailed description of lung inflation patterns by measuring the size and the local curvature of the parenchymal airspaces. These quantitative tools for morphological and topological analyses were applied to high-resolution murine 3D lung image data, inflated at different pressure levels under immediate post mortem conditions...
2017: PloS One
https://www.readbyqxmd.com/read/28933724/an-automatic-multi-target-independent-analysis-framework-for-non-planar-infrared-visible-registration
#7
Xinglong Sun, Tingfa Xu, Jizhou Zhang, Zishu Zhao, Yuankun Li
In this paper, we propose a novel automatic multi-target registration framework for non-planar infrared-visible videos. Previous approaches usually analyzed multiple targets together and then estimated a global homography for the whole scene, however, these cannot achieve precise multi-target registration when the scenes are non-planar. Our framework is devoted to solving the problem using feature matching and multi-target tracking. The key idea is to analyze and register each target independently. We present a fast and robust feature matching strategy, where only the features on the corresponding foreground pairs are matched...
July 26, 2017: Sensors
https://www.readbyqxmd.com/read/28933723/artificial-lipid-membranes-past-present-and-future
#8
REVIEW
Christina G Siontorou, Georgia-Paraskevi Nikoleli, Dimitrios P Nikolelis, Stefanos K Karapetis
The multifaceted role of biological membranes prompted early the development of artificial lipid-based models with a primary view of reconstituting the natural functions in vitro so as to study and exploit chemoreception for sensor engineering. Over the years, a fair amount of knowledge on the artificial lipid membranes, as both, suspended or supported lipid films and liposomes, has been disseminated and has helped to diversify and expand initial scopes. Artificial lipid membranes can be constructed by several methods, stabilized by various means, functionalized in a variety of ways, experimented upon intensively, and broadly utilized in sensor development, drug testing, drug discovery or as molecular tools and research probes for elucidating the mechanics and the mechanisms of biological membranes...
July 26, 2017: Membranes
https://www.readbyqxmd.com/read/28933329/-mid-term-to-long-term-results-of-revision-total-hip-arthroplasty-using-the-oval-shaped-acetabular-cup-tc-type
#9
E Šťastný, T Trč, J Frýdl, Z Kopečný, T Philippou, J Lisý
INTRODUCTION The purpose of our paper is to evaluate the mid-term to long-term results and to confirm the basic criteria of a high-quality revision implant: safe bridging of bone defects, achievement of reliable primary fixation of revision acetabular cup, achievement of good secondary stability with documentable osteointegration of cup and demonstration of remodelling of transplanted bone tissue in the area of defects and in spaces between the implant ribs. MATERIAL AND METHODS Altogether 36 patients (38 cups) were evaluated who had undergone revision hip arthroplasty in the period from 2004 to 2010...
2017: Acta Chirurgiae Orthopaedicae et Traumatologiae Cechoslovaca
https://www.readbyqxmd.com/read/28933294/biodegradable-black-phosphorus-based-nanomaterials-in-biomedicine-theranostic-applications
#10
Zhen Wang, Zhiming Liu, Chengkang Su, Biwen Yang, Xixi Fei, Yi Li, Yuqing Hou, Henan Zhao, Yanxian Guo, Zhengfei Zhuang, Huiqing Zhong, Zhouyi Guo
Ascribe to the unique two-dimensional planar nanostructure with exceptional physical and chemical properties, black phosphorous (BP) as the emerging inorganic two-dimensional nanomaterial with high biocompatibility and degradability has been becoming one of the most promising materials of great potentials in biomedicine. The exfoliated BP sheets possess ultra-high surface area available for valid bio-conjugation and molecular loading for chemotherapy. Utilizing the intrinsic near-infrared optical absorbance, BP-based photothermal therapy in vivo, photodynamic therapy and biomedical imaging has been realized, achieving unprecedented anti-tumor therapeutic efficacy in animal experiments...
September 20, 2017: Current Medicinal Chemistry
https://www.readbyqxmd.com/read/28933289/recent-applications-of-silver-amalgam-electrodes-for-analysis-of-pharmaceuticals-and-vitamins
#11
Sylwia Smarzewska, Radovan Metelka, Bogusław Baś, Karel Vytřas
The features and applications of silver amalgam electrodes in electroanalysis of pharmaceuticals and vitamins are summarized in this review. The state-of-art in the preparation and construction of solid silver amalgam electrodes for prolonged and user-friendly use is presented. Although not as widely spread as other electrode materials, silver amalgam possesses a unique and viable combination of favorable electrochemical properties, which are close to ideal mercury electrodes, non-toxic character, high durability and mechanical stability, if properly prepared...
September 20, 2017: Current Medicinal Chemistry
https://www.readbyqxmd.com/read/28933222/altered-hippocampal-neurogenesis-during-the-first-7-days-after-a-fluid-percussion-traumatic-brain-injury
#12
Lee A Shapiro
Traumatic brain injury (TBI) is a devastating disorder causing negative outcomes in millions of people each year. Despite the alarming number of brain injuries and the long-term detrimental outcomes that can be associated with TBI, treatment options are lacking. Extensive investigation is underway, in hopes of identifying effective treatment strategies. Among the most state-of-the-art strategies is cell replacement therapy. TBI is a seemingly good candidate for cell replacement studies because there is often loss of neurons...
July 2017: Cell Transplantation
https://www.readbyqxmd.com/read/28933147/antimicrobial-chitosan-and-chitosan-derivatives-a-review-of-the-structure-activity-relationship
#13
Priyanka Sahariah, Már Másson
This review gives an updated overview of the current state-of-the-art for antimicrobial chitosan and chitosan derivatives and the effects of structural modifications on activity and toxicity. The various synthetic routes introduced for chemical modification of chitosan are discussed and the most common functional groups are highlighted. Different analytical techniques used for structural characterization of the synthesized chitosan derivatives are discussed and critically evaluated. For the purpose of this review, the antimicrobial chitosan derivatives have been classified on the basis of the type of functional group conjugated to the polymer backbone...
September 21, 2017: Biomacromolecules
https://www.readbyqxmd.com/read/28932912/behavioral-cognitive-and-emotional-coping-strategies-of-women-with-endometriosis-a-critical-narrative-review
#14
REVIEW
Cristina Zarbo, Agostino Brugnera, Luigi Frigerio, Chiara Malandrino, Massimo Rabboni, Emi Bondi, Angelo Compare
Endometriosis is a disabling and long-term medical condition affecting quality of life and mental health. Behavioral, cognitive, and emotional coping strategies, emotional intelligence, and metacognition could in part explain the link between the disease and impaired psychological and life functioning. This critical narrative review aimed at examining the state of the art of the relationships between endometriosis and these factors. According to PRISMA principles, we performed a systematic search for quantitative and qualitative studies on multiple electronic databases as regards coping strategies, emotional intelligence, and metacognition in women with endometriosis...
September 21, 2017: Archives of Women's Mental Health
https://www.readbyqxmd.com/read/28932739/agonist-binding-to-chemosensory-receptors-a-systematic-bioinformatics-analysis
#15
Fabrizio Fierro, Eda Suku, Mercedes Alfonso-Prieto, Alejandro Giorgetti, Sven Cichon, Paolo Carloni
Human G-protein coupled receptors (hGPCRs) constitute a large and highly pharmaceutically relevant membrane receptor superfamily. About half of the hGPCRs' family members are chemosensory receptors, involved in bitter taste and olfaction, along with a variety of other physiological processes. Hence these receptors constitute promising targets for pharmaceutical intervention. Molecular modeling has been so far the most important tool to get insights on agonist binding and receptor activation. Here we investigate both aspects by bioinformatics-based predictions across all bitter taste and odorant receptors for which site-directed mutagenesis data are available...
2017: Frontiers in Molecular Biosciences
https://www.readbyqxmd.com/read/28932701/mr-imaging-of-the-traumatic-triangular-fibrocartilaginous-complex-tear
#16
REVIEW
Alex W H Ng, James F Griffith, Cindy S Y Fung, Ryan K L Lee, Cina S L Tong, Clara W Y Wong, Wing Lim Tse, Pak Cheong Ho
Triangular fibrocartilage complex is a major stabilizer of the distal radioulnar joint (DRUJ). However, triangular fibrocartilage complex (TFCC) tear is difficult to be diagnosed on MRI for its intrinsic small and thin structure with complex anatomy. The purpose of this article is to review the anatomy of TFCC, state of art MRI imaging technique, normal appearance and features of tear on MRI according to the Palmar's classification. Atypical tear and limitations of MRI in diagnosis of TFCC tear are also discussed...
August 2017: Quantitative Imaging in Medicine and Surgery
https://www.readbyqxmd.com/read/28932180/hardware-efficient-on-line-learning-through-pipelined-truncated-error-backpropagation-in-binary-state-networks
#17
Hesham Mostafa, Bruno Pedroni, Sadique Sheik, Gert Cauwenberghs
Artificial neural networks (ANNs) trained using backpropagation are powerful learning architectures that have achieved state-of-the-art performance in various benchmarks. Significant effort has been devoted to developing custom silicon devices to accelerate inference in ANNs. Accelerating the training phase, however, has attracted relatively little attention. In this paper, we describe a hardware-efficient on-line learning technique for feedforward multi-layer ANNs that is based on pipelined backpropagation...
2017: Frontiers in Neuroscience
https://www.readbyqxmd.com/read/28931954/structure-of-the-solar-photosphere-studied-from-the-radiation-hydrodynamics-code-antares
#18
P Leitner, B Lemmerer, A Hanslmeier, T Zaqarashvili, A Veronig, H Grimm-Strele, H J Muthsam
The ANTARES radiation hydrodynamics code is capable of simulating the solar granulation in detail unequaled by direct observation. We introduce a state-of-the-art numerical tool to the solar physics community and demonstrate its applicability to model the solar granulation. The code is based on the weighted essentially non-oscillatory finite volume method and by its implementation of local mesh refinement is also capable of simulating turbulent fluids. While the ANTARES code already provides promising insights into small-scale dynamical processes occurring in the quiet-Sun photosphere, it will soon be capable of modeling the latter in the scope of radiation magnetohydrodynamics...
2017: Astrophysics and Space Science
https://www.readbyqxmd.com/read/28931888/automatic-classification-of-cancerous-tissue-in-laserendomicroscopy-images-of-the-oral-cavity-using-deep-learning
#19
Marc Aubreville, Christian Knipfer, Nicolai Oetter, Christian Jaremenko, Erik Rodner, Joachim Denzler, Christopher Bohr, Helmut Neumann, Florian Stelzle, Andreas Maier
Oral Squamous Cell Carcinoma (OSCC) is a common type of cancer of the oral epithelium. Despite their high impact on mortality, sufficient screening methods for early diagnosis of OSCC often lack accuracy and thus OSCCs are mostly diagnosed at a late stage. Early detection and accurate outline estimation of OSCCs would lead to a better curative outcome and a reduction in recurrence rates after surgical treatment. Confocal Laser Endomicroscopy (CLE) records sub-surface micro-anatomical images for in vivo cell structure analysis...
September 20, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28931438/global-collaborative-healthcare-assessing-the-resource-requirements-at-a-leading-academic-medical-center
#20
REVIEW
Nicole J Rosson, Heitham T Hassoun
INTRODUCTION: Academic Medical Centers ("AMCs") have served as a hub of the United States ("US") health system and represented the state-of-the art in American health care for well over a century. Currently, the global healthcare market is both massive and expanding and is being altered by the unprecedented impact of technological advances and globalization. This provides AMCs a platform to enter into trans-national collaborative partnerships with healthcare organizations around the world, thus providing a means to deliver on its promise globally while also expanding and diversifying its resources...
September 20, 2017: Globalization and Health
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