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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/28934787/complex-regional-pain-syndrome-type-i-a-debilitating-and-poorly-understood-syndrome-possible-role-for-pulsed-electromagnetic-fields-a-narrative-review
#2
Stefania Pagani, Francesca Veronesi, Nicolo Nicoli Aldini, Milena Fini
BACKGROUND: Complex regional pain syndrome type I (CRPS-I), also called algodystrophy, is a complex syndrome characterized by limb pain, edema, allodynia, hyperalgesia and functional impairment of bone with a similar clinical picture of osteoporosis, including an increased release of various pro-inflammatory neuropeptides and cytokines. Several treatments have been proposed for CRPS-I, but due to the poor outcome of conventional drugs and the invasiveness of some techniques, expectations are now directed towards new resources that could be more effective and less invasive...
September 2017: Pain Physician
https://www.readbyqxmd.com/read/28934674/managing-for-climate-change-on-protected-areas-an-adaptive-management-decision-making-framework
#3
Sherri L Tanner-McAllister, Jonathan Rhodes, Marc Hockings
Current protected area management is becoming more challenging with advancing climate change and current park management techniques may not be adequate to adapt for effective management into the future. The framework presented here provides an adaptive management decision making process to assist protected area managers with adapting on-park management to climate change. The framework sets out a 4 step process. One, a good understanding of the park's context within climate change. Secondly, a thorough understanding of the park management systems including governance, planning and management systems...
September 18, 2017: Journal of Environmental Management
https://www.readbyqxmd.com/read/28934234/a-novel-feature-ranking-method-for-prediction-of-cancer-stages-using-proteomics-data
#4
Ehsan Saghapour, Saeed Kermani, Mohammadreza Sehhati
Proteomic analysis of cancers' stages has provided new opportunities for the development of novel, highly sensitive diagnostic tools which helps early detection of cancer. This paper introduces a new feature ranking approach called FRMT. FRMT is based on the Technique for Order of Preference by Similarity to Ideal Solution method (TOPSIS) which select the most discriminative proteins from proteomics data for cancer staging. In this approach, outcomes of 10 feature selection techniques were combined by TOPSIS method, to select the final discriminative proteins from seven different proteomic databases of protein expression profiles...
2017: PloS One
https://www.readbyqxmd.com/read/28934135/novel-self-assembly-induced-gelation-for-nanofibrous-collagen-hydroxyapatite-composite-microspheres
#5
Jae-Won Choi, Jong-Woo Kim, In-Hwan Jo, Young-Hag Koh, Hyoun-Ee Kim
This study demonstrates the utility of the newly developed self-assembly-induced gelation technique for the synthesis of porous collagen/hydroxyapatite (HA) composite microspheres with a nanofibrous structure. This new approach can produce microspheres of a uniform size using the droplets that form at the nozzle tip before gelation. These microspheres can have a highly nanofibrous structure due to the immersion of the droplets in a coagulation bath (water/acetone), in which the collagen aggregates in the solution can self-assemble into fibrils due to pH-dependent precipitation...
September 21, 2017: Materials
https://www.readbyqxmd.com/read/28934094/estimated-changes-in-life-expectancy-and-adult-mortality-resulting-from-declining-pm2-5-exposures-in-the-contiguous-united-states-1980-2010
#6
Neal Fann, Sun-Young Kim, Casey Olives, Lianne Sheppard
BACKGROUND: PM2.5 precursor emissions have declined over the course of several decades, following the implementation of local, state, and federal air quality policies. Estimating the corresponding change in population exposure and PM2.5-attributable risk of death prior to the year 2000 is made difficult by the lack of PM2.5 monitoring data. OBJECTIVES: We used a new technique to estimate historical PM2.5 concentrations, and estimated the effects of changes in PM2...
September 6, 2017: Environmental Health Perspectives
https://www.readbyqxmd.com/read/28933917/grape-and-wine-polymeric-polyphenols-their-importance-in-enology
#7
Lingxi Li, Baoshan Sun
Phenolic compounds are important constituents of red wine, contributing to its sensory properties and antioxidant activity. Owing to the diversity and structural complexity, study of these compounds was mainly limited, during the last three decades, on their low-molecular-mass compounds or simple phenolic compounds. Only in recent years, much attention has been paid to highly polymerized polyphenols in grape and red wines. The reason for this is largely due to the development of analytical techniques, especially those of HPLC-ESI-MS, permitting the structural characterization of highly polymerized polyphenols...
September 21, 2017: Critical Reviews in Food Science and Nutrition
https://www.readbyqxmd.com/read/28933368/biomarkers-and-imaging-findings-of-anderson-fabry-disease-what-we-know-now
#8
REVIEW
Idalina Beirão, Ana Cabrita, Márcia Torres, Fernando Silva, Patrício Aguiar, Francisco Laranjeira, Ana Marta Gomes
Anderson-Fabry disease (AFD) is an X-linked lysosomal storage disorder, caused by deficiency or absence of the alpha-galactosidase A activity, with a consequent glycosphingolipid accumulation. Biomarkers and imaging findings may be useful for diagnosis, identification of an organ involvement, therapy monitoring and prognosis. The aim of this article is to review the current available literature on biomarkers and imaging findings of AFD patients. An extensive bibliographic review from PubMed, Medline and Clinical Key databases was performed by a group of experts from nephrology, neurology, genetics, cardiology and internal medicine, aiming for consensus...
June 11, 2017: Diseases (Basel)
https://www.readbyqxmd.com/read/28933153/rapid-sequential-in-situ-multiplexing-with-dna-exchange-imaging-in-neuronal-cells-and-tissues
#9
Yu Wang, Johannes B Woehrstein, Noah Donoghue, Mingjie Dai, Maier S Avendano, Ron C J Schackmann, Jason Zoeller, Shan Shan H Wang, Paul W Tillberg, Demian Park, Sylvain W Lapan, Edward S Boyden, Joan S Brugge, Pascal S Kaeser, George Church, Sarit S Agasti, Ralf Jungmann, Peng Yin
To decipher the molecular mechanism of biological function, it is critical to map the molecular composition of individual cells or even more importantly tissue samples in the context of their biological environment in situ. Immunofluorescence (IF) provides specific labeling for molecular profiling. However, conventional IF methods have finite multiplexing capabilities due to spectral overlap of the fluorophores. Various sequential imaging methods have been developed to circumvent this spectral limit, but are not widely adopted due to the common limitation of requiring multi-rounds of slow (typically over 2 hours at room temperature to overnight at 4 °C in practice) immunostaining...
September 21, 2017: Nano Letters
https://www.readbyqxmd.com/read/28932935/a-mixed-methods-evaluation-of-paediatric-trainee-preparedness-to-manage-cardiopulmonary-arrests
#10
Órla Walsh, Sinéad Lydon, Paul O'Connor
Paediatric cardiopulmonary arrest (CPA) survival rates are strongly linked to the training of the doctors responding to the event. This study sought to characterise the level of experience in managing CPAs among paediatric trainees and to investigate the nontechnical (NTS) required to effectively lead a paediatric CPA team. A mixed-methods research design was used. For the quantitative phase, a questionnaire was developed to assess training, confidence, and experiences related to CPA management. During the qualitative phase, 17 paediatric trainees participated in a series of critical incident technique (CIT) interviews to explore the NTS used during the management of paediatric CPAs...
September 21, 2017: European Journal of Pediatrics
https://www.readbyqxmd.com/read/28932924/when-gis-zooms-in-spatio-genetic-maps-of-multipaternity-in-armadillidium-vulgare
#11
Nicolas Bech, Charlotte Depeux, Sylvine Durand, Catherine Debenest, Alexandra Lafitte, Sophie Beltran-Bech
Geographic information system (GIS) tools are designed to illustrate, analyse and integrate geographic or spatial data, usually on a macroscopic scale. By contrast, genetic tools focus on a microscopic scale. Because in reality, landscapes have no predefined scale, our original study aims to develop a new approach, combining both cartographic and genetic approaches to explore microscopic landscapes. For this, we focused on Armadillidium vulgare, a terrestrial isopod model in which evolutionary pressures imposed by terrestrial life have led to the development of internal fertilisation and, consequently, to associated physiological changes...
September 20, 2017: Genetica
https://www.readbyqxmd.com/read/28932891/identification-of-terpenes-and-essential-oils-by-means-of-static-headspace-gas-chromatography-ion-mobility-spectrometry
#12
Roman Rodríguez-Maecker, Eduardo Vyhmeister, Stefan Meisen, Antonio Rosales Martinez, Andriy Kuklya, Ursula Telgheder
Static headspace gas chromatography-ion mobility spectrometry (SHS GC-IMS) is a relatively new analytical technique that has considerable potential for analysis of volatile organic compounds (VOCs). In this study, SHS GC-IMS was used for the identification of the major terpene components of various essential oils (EOs). Based on the data obtained from 25 terpene standards and 50 EOs, a database for fingerprint identification of characteristic terpenes and EOs was generated utilizing SHS GC-IMS for authenticity testing of fragrances in foods, cosmetics, and personal care products...
September 20, 2017: Analytical and Bioanalytical Chemistry
https://www.readbyqxmd.com/read/28932733/pectoral-nerve-block-pecs-block-with-sedation-for-breast-conserving-surgery-without-general-anesthesia
#13
Eun-Jin Moon, Seung-Beom Kim, Jun-Young Chung, Jeong-Yoon Song, Jae-Woo Yi
Most regional anesthesia in breast surgeries is performed as postoperative pain management under general anesthesia, and not as the primary anesthesia. Regional anesthesia has very few cardiovascular or pulmonary side-effects, as compared with general anesthesia. Pectoral nerve block is a relatively new technique, with fewer complications than other regional anesthesia. We performed Pecs I and Pec II block simultaneously as primary anesthesia under moderate sedation with dexmedetomidine for breast conserving surgery in a 49-year-old female patient with invasive ductal carcinoma...
September 2017: Annals of Surgical Treatment and Research
https://www.readbyqxmd.com/read/28932698/quantitative-magnetic-resonance-mr-neurography-for-evaluation-of-peripheral-nerves-and-plexus-injuries
#14
REVIEW
Teodoro Martín Noguerol, Rafael Barousse, Mariano Socolovsky, Antonio Luna
Traumatic conditions of peripheral nerves and plexus have been classically evaluated by morphological imaging techniques and electrophysiological tests. New magnetic resonance imaging (MRI) studies based on 3D fat-suppressed techniques are providing high accuracy for peripheral nerve injury evaluation from a qualitative point of view. However, these techniques do not provide quantitative information. Diffusion weighted imaging (DWI) and diffusion tensor imaging (DTI) are functional MRI techniques that are able to evaluate and quantify the movement of water molecules within different biological structures...
August 2017: Quantitative Imaging in Medicine and Surgery
https://www.readbyqxmd.com/read/28932664/strong-electro-optic-effect-and-spontaneous-domain-formation-in-self-assembled-peptide-structures
#15
Barak Gilboa, Clément Lafargue, Amir Handelman, Linda J W Shimon, Gil Rosenman, Joseph Zyss, Tal Ellenbogen
Short peptides made from repeating units of phenylalanine self-assemble into a remarkable variety of micro- and nanostructures including tubes, tapes, spheres, and fibrils. These bio-organic structures are found to possess striking mechanical, electrical, and optical properties, which are rarely seen in organic materials, and are therefore shown useful for diverse applications including regenerative medicine, targeted drug delivery, and biocompatible fluorescent probes. Consequently, finding new optical properties in these materials can significantly advance their practical use, for example, by allowing new ways to visualize, manipulate, and utilize them in new, in vivo, sensing applications...
September 2017: Advanced Science (Weinheim, Baden-Wurttemberg, Germany)
https://www.readbyqxmd.com/read/28932658/the-process-of-wrapping-virus-revealed-by-a-force-tracing-technique-and-simulations
#16
Yangang Pan, Fuxian Zhang, Liuyang Zhang, Shuheng Liu, Mingjun Cai, Yuping Shan, Xianqiao Wang, Hanzhong Wang, Hongda Wang
Viral entry into the host cell is the first step of virus infection; however, its dynamic process via endocytosis remains largely elusive. Here, the force tracing technique and single particle simulation are combined to investigate the invagination of single human enterovirus 71 (HEV71, a positive single-stranded RNA virus that is associated with hand, foot, and mouth disease) via cell membranes during its host cell entry. The experimental results reveal that the HEV71 invaginates in membrane vesicles at a force of 58 ± 16 pN, a duration time of 278 ± 68 ms...
September 2017: Advanced Science (Weinheim, Baden-Wurttemberg, Germany)
https://www.readbyqxmd.com/read/28932623/proteomics-technique-opens-new-frontiers-in-mobilome-research
#17
COMMENT
Andrew D Davidson, David A Matthews, Kevin Maringer
A large proportion of the genome of most eukaryotic organisms consists of highly repetitive mobile genetic elements. The sum of these elements is called the "mobilome," which in eukaryotes is made up mostly of transposons. Transposable elements contribute to disease, evolution, and normal physiology by mediating genetic rearrangement, and through the "domestication" of transposon proteins for cellular functions. Although 'omics studies of mobilome genomes and transcriptomes are common, technical challenges have hampered high-throughput global proteomics analyses of transposons...
2017: Mobile Genetic Elements
https://www.readbyqxmd.com/read/28931979/comparison-of-immediate-effects-between-two-medical-stretching-techniques-on-hamstrings-flexibility
#18
Thanda Aye, Tsugumi Kuramoto-Ahuja, Heonsoo Han, Hitoshi Maruyama
[Purpose] The aim of this study was to compare immediate effects between new medical stretching (NMS) and conventional medical stretching (CMS) techniques on Hamstrings flexibility. [Subjects and Methods] Thirteen healthy adult males, with finger floor distance (FFD) less than zero centimeter, without known musculoskeletal and neurological impairment in spine or lower extremities, were included. The subjects were randomly allocated to two groups. The subjects were instructed to perform NMS and CMS (hold for 30 seconds once, twice for each side of lower extremity) for both sides (total two minutes, only one session for one day)...
September 2017: Journal of Physical Therapy Science
https://www.readbyqxmd.com/read/28931947/cytochalasan-and-tyrosine-derived-alkaloids-from-the-marine-sediment-derived-fungus-westerdykella-dispersa-and-their-bioactivities
#19
Dan Xu, Minghe Luo, Fenglou Liu, Dong Wang, Xuejiao Pang, Ting Zhao, Lulin Xu, Xia Wu, Mingyu Xia, Xiaolong Yang
Six new cytochalasans, designated as 18-oxo-19,20-dihydrophomacin C (1), 18-oxo-19-methoxy-19,20- dihydrophomacin C (2), 18-oxo-19-hydroxyl-19,20-dihydrophomacin C (3), 19,20-dihydrophomacin C (4), 19-methoxy-19,20-dihydrophomacin C (5), 19-hydroxyl-19,20-dihydrophomacin C (6), and one new tyrosine-derived alkaloid named as gymnastatin Z (8), together with two known compounds, phomacin B (7) and triticone D (9), were isolated from a solid-substrate fermentation culture of Westerdykella dispersa which was derived from marine sediments...
September 20, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28931889/fast-fourier-single-pixel-imaging-via-binary-illumination
#20
Zibang Zhang, Xueying Wang, Guoan Zheng, Jingang Zhong
Fourier single-pixel imaging (FSI) employs Fourier basis patterns for encoding spatial information and is capable of reconstructing high-quality two-dimensional and three-dimensional images. Fourier-domain sparsity in natural scenes allows FSI to recover sharp images from undersampled data. The original FSI demonstration, however, requires grayscale Fourier basis patterns for illumination. This requirement imposes a limitation on the imaging speed as digital micro-mirror devices (DMDs) generate grayscale patterns at a low refreshing rate...
September 20, 2017: Scientific Reports
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