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https://www.readbyqxmd.com/read/29352498/autofocusing-based-phase-correction
#1
Alexander Loktyushin, Philipp Ehses, Bernhard Schölkopf, Klaus Scheffler
PURPOSE: Phase artifacts due to B0 inhomogeneity can severely degrade the quality of MR images. The artifacts are particularly prominent in long-TE scans and usually appear as ghosting and blur. We propose a retrospective phase correction method based on autofocusing. The proposed method uses raw data acquired with standard imaging sequences, and does not rely on navigators or external measures of field inhomogeneity. METHODS: We formulate and solve the optimization problem, where we seek the latent phase offsets that are associated with an optimal value of the image quality measure that is evaluated in the spatial domain...
January 19, 2018: Magnetic Resonance in Medicine: Official Journal of the Society of Magnetic Resonance in Medicine
https://www.readbyqxmd.com/read/29352189/mechanical-behavior-of-a-soft-hydrogel-reinforced-with-three-dimensional-printed-microfibre-scaffolds
#2
Miguel Castilho, Gernot Hochleitner, Wouter Wilson, Bert van Rietbergen, Paul D Dalton, Jürgen Groll, Jos Malda, Keita Ito
Reinforcing hydrogels with micro-fibre scaffolds obtained by a Melt-Electrospinning Writing (MEW) process has demonstrated great promise for developing tissue engineered (TE) constructs with mechanical properties compatible to native tissues. However, the mechanical performance and reinforcement mechanism of the micro-fibre reinforced hydrogels is not yet fully understood. In this study, FE models, implementing material properties measured experimentally, were used to explore the reinforcement mechanism of fibre-hydrogel composites...
January 19, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29352057/feasibility-complications-morbidity-and-mortality-results-at-6-months-for-aneurysm-treatment-with-the-flow-re-direction-endoluminal-device-report-of-safe-study
#3
Laurent Pierot, Laurent Spelle, Jérôme Berge, Anne-Christine Januel, Denis Herbreteau, Mohamed Aggour, Michel Piotin, Alessandra Biondi, Xavier Barreau, Charbel Mounayer, Chrisanthi Papagiannaki, Jean-Paul Lejeune, Jean-Yves Gauvrit, Vincent Costalat
BACKGROUND AND PURPOSE: Flow diverters are increasingly used for the treatment of intracranial aneurysms. Evaluation of the first devices available for clinical use showed high efficacy of this treatment although safety results were worse compared with coiling or balloon-assisted coiling. The Safety and Efficacy Analysis of FRED Embolic Device in Aneurysm Treatment (SAFE) trial is a single-arm, multicenter, prospective study conducted to precisely analyze the safety and efficacy of the FRED and FRED Jr devices...
January 19, 2018: Journal of Neurointerventional Surgery
https://www.readbyqxmd.com/read/29350684/east-of-england-regional-retinopathy-of-prematurity
#4
L E Allen, A Te Water Naudé
No abstract text is available yet for this article.
January 19, 2018: Eye
https://www.readbyqxmd.com/read/29349887/realizing-zt-of-2-3-in-ge1-x-y-sbx-iny-te-via-reducing-the-phase-transition-temperature-and-introducing-resonant-energy-doping
#5
Min Hong, Zhi-Gang Chen, Lei Yang, Yi-Chao Zou, Matthew S Dargusch, Hao Wang, Jin Zou
GeTe with rhombohedral-to-cubic phase transition is a promising lead-free thermoelectric candidate. Herein, theoretical studies reveal that cubic GeTe has superior thermoelectric behavior, which is linked to (1) the two valence bands to enhance the electronic transport coefficients and (2) stronger enharmonic phonon-phonon interactions to ensure a lower intrinsic thermal conductivity. Experimentally, based on Ge1-x Sbx Te with optimized carrier concentration, a record-high figure-of-merit of 2.3 is achieved via further doping with In, which induces the distortion of the density of states near the Fermi level...
January 19, 2018: Advanced Materials
https://www.readbyqxmd.com/read/29348622/a-novel-method-of-utilizing-skinfolds-and-bioimpedance-for-determining-body-fat-percentage-via-a-field-based-three-compartment-model
#6
Michael R Esco, Brett S Nickerson, Michael V Fedewa, Jordan R Moon, Ronald L Snarr
BACKGROUND/OBJECTIVES: The purpose was to determine if skinfolds (SF) and bioelectrical impedance analysis (BIA) could provide accurate estimates of body volume (BV) and total body water (TBW), respectively, for use in a 3-compartment (3-C) model to estimate percent body fat (BF%) when compared to laboratory derived measures. SUBJECTS/METHODS: A sample of sixty-four men (age = 22.9 ± 5.4 years) and 59 women (age = 21.6 ± 4.3 years) participated in the study...
January 18, 2018: European Journal of Clinical Nutrition
https://www.readbyqxmd.com/read/29348600/chinese-olive-extract-ameliorates-hepatic-lipid-accumulation-in-vitro-and-in-vivo-by-regulating-lipid-metabolism
#7
Yu-Te Yeh, Yan-Yu Cho, Shu-Chen Hsieh, An-Na Chiang
Chinese olive contains plenty of polyphenols, which possess a wide range of biological actions. In this study, we aimed to investigate the role of the ethyl acetate fraction of Chinese olive fruit extract (CO-EtOAc) in the modulation of lipid accumulation in vitro and in vivo. In cellular studies, CO-EtOAc attenuated oleic acid-induced lipid accumulation; we then elucidated the molecular mechanisms of CO-EtOAc in FL83B mouse hepatocytes. CO-EtOAc suppressed the mRNA levels of fatty acid transporter genes (CD36 and FABP) and lipogenesis genes (SREBP-1c, FAS, and ACC1), but upregulated genes that govern lipolysis (HSL) and lipid oxidation (PPARα, CPT-1, and ACOX)...
January 18, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29347069/adaptive-numerical-algorithms-to-simulate-the-dynamical-casimir-effect-in-a-closed-cavity-with-different-boundary-conditions
#8
Paula I Villar, Alejandro Soba
We present an alternative numerical approach to compute the number of particles created inside a cavity due to time-dependent boundary conditions. The physical model consists of a rectangular cavity, where a wall always remains still while the other wall of the cavity presents a smooth movement in one direction. The method relies on the setting of the boundary conditions (Dirichlet and Neumann) and the following resolution of the corresponding equations of modes. By a further comparison between the ground state before and after the movement of the cavity wall, we finally compute the number of particles created...
July 2017: Physical Review. E
https://www.readbyqxmd.com/read/29346631/anticardiolipin-antibodies-and-12-month-graft-function-in-kidney-transplant-recipients-a-prognosis-cohort-survey
#9
Marion Gauthier, Florence Canoui-Poitrine, Esther Guéry, Dominique Desvaux, Sophie Hue, Guillaume Canaud, Thomas Stehle, Philippe Lang, Tomek Kofman, Philippe Grimbert, Marie Matignon
Background: In kidney transplant recipients, anticardiolipin (ACL) antibodies without antiphospholipid syndrome (APS) are found in up to 38% of patients and could be associated with thrombotic events (TEs). However, the prognostic role of ACL regarding kidney transplant and patients outcomes have still not been well defined. Methods: We conducted an observational, monocentric, retrospective cohort study including 446 kidney transplant recipients and standardized follow-up: 36-month allograft and patient survival, 12-month estimated glomerular filtration rate (eGFR) and 3- and 12-month screening biopsies...
January 16, 2018: Nephrology, Dialysis, Transplantation
https://www.readbyqxmd.com/read/29346486/treatment-outcomes-and-adverse-events-following-in-office-angiolytic-laser-with-or-without-concurrent-polypectomy-for-vocal-fold-polyps
#10
Yu-Hsuan Lin, Chi-Te Wang, Feng-Chuan Lin, Li-Jen Liao, Wu-Chia Lo, Po-Wen Cheng
Importance: In-office angiolytic laser procedures have been used successfully as an alternative treatment for vocal fold polyps; little is known in detail about the treatment outcomes and adverse events. Objective: To examine the outcomes and incidence rates of adverse events associated with in-office angiolytic laser procedures with or without concurrent polypectomy as an alternative treatment for vocal fold polyps. Design, Setting, and Participants: Retrospective cohort study at a tertiary medical center...
January 18, 2018: JAMA Otolaryngology—Head & Neck Surgery
https://www.readbyqxmd.com/read/29346443/exposure-to-previous-cart-is-associated-with-significant-liver-fibrosis-and-cirrhosis-in-human-immunodeficiency-virus-infected-patients
#11
Evrim Anadol, Kristina Lust, Christoph Boesecke, Carolynne Schwarze-Zander, Raphael Mohr, Jan-Christian Wasmuth, Jürgen Kurt Rockstroh, Jonel Trebicka
INTRODUCTION: Combined antiretroviral therapy (cART) has improved survival in HIV-patients. While the first antiretrovirals, which became available in particular D-drugs (especially didanosine and stavudine) and unboosted protease inhibitors, may impair liver function, the modern cART seems to decrease liver fibrosis. This study assessed the influence of exposure to previous antiretrovirals on liver fibrosis in HIV-infected patients. METHODS: This observational cross-sectional single-center study recruited 333 HIV patients and assessed liver fibrosis using transient elastography (TE)...
2018: PloS One
https://www.readbyqxmd.com/read/29345324/autocrine-signals-increase-ovine-mesenchymal-stem-cells-migration-through-aquaporin-1-and-cxcr4-overexpression
#12
Alessandra Pelagalli, Anna Nardelli, Enrico Lucarelli, Antonella Zannetti, Arturo Brunetti
Sheep is a relevant large animal model that is frequently used to test innovative tissue engineering (TE) approaches especially for bone reconstruction. Mesenchymal stem cells (MSCs) are used in TE applications because they represent key component of adult tissue repair. Importantly, MSCs from different species show similar characteristics, which facilitated their application in translational studies using animal models. Nowadays, many researches are focusing on the use of ovine mesenchymal stem cells (oMSCs) in orthopedic preclinical settings for regenerative medicine purposes...
January 18, 2018: Journal of Cellular Physiology
https://www.readbyqxmd.com/read/29344159/p38-predicts-depression-and-poor-outcome-in-esophageal-cancer
#13
Yao Cheng, Zhe Qiao, Chengxue Dang, Bin Zhou, Shaomin Li, Wei Zhang, Jiantao Jiang, Yongchun Song, Jin Zhang, Dongmei Diao
p38 mitogen-activated protein kinase (MAPK) signaling has been implicated in the cancer development and progression. However, the precise mechanism of this association remains unknown. The aim of the present study was to evaluate the association between p38 and cancer progression, including investigations into the effects on cell proliferation, resistance to thalidomide, indoleamine 2,3-dioxygenase (IDO) expression and prognosis in patients with esophageal cancer. The present retrospective study included patients with stage I-III esophageal cancer...
December 2017: Oncology Letters
https://www.readbyqxmd.com/read/29343274/coexistent-sickle-cell-anemia-and-autoimmune-disease-in-eight-children-pitfalls-and-challenges
#14
Valerie Li-Thiao-Te, Florence Uettwiller, Pierre Quartier, Florence Lacaille, Brigitte Bader-Meunier, Valentine Brousse, Mariane de Montalembert
BACKGROUND: Patients with sickle cell disease (SCD) present a defective activation of the alternate complement pathway that increases the risk of infection and is thought to predispose to autoimmune disease (AID). However, coexisting AID and SCD is rarely reported, suggesting possible underdiagnosis due to an overlapping of the symptoms. STUDY DESIGN: Among 603 patients with SCD followed between 1999 and June 2016, we retrospectively searched for patients with coexisting SCD and AID...
January 17, 2018: Pediatric Rheumatology Online Journal
https://www.readbyqxmd.com/read/29342460/role-of-the-frontal-sinus-in-mediating-ocular-vestibular-evoked-myogenic-potentials-by-bone-vibration-stimuli-applied-to-the-forehead
#15
Kuei-You Lin, Te-Huei Yeh, Fu-Shan Jaw, Yi-Ho Young
This study investigated ocular vestibular-evoked myogenic potential (oVEMP) tests via Fpz and Fz taps to assess the role of the frontal sinus in mediating oVEMP elicitation. Forty healthy subjects and 80 patients with Ménière disease (MD) underwent a series of oVEMP tests via a minishaker tapping at the Fpz and Fz sites in a randomized order. Response rates of oVEMP test via various tapping sites were compared. Dimensions of the frontal sinus were measured via CT scan. A significantly negative correlation between the age and height of the frontal sinus was noted, and the cutoff age for discriminating present and absent Fpz oVEMPs in MD patients was 52 years...
January 18, 2018: Audiology & Neuro-otology
https://www.readbyqxmd.com/read/29342430/tissue-expander-stimulated-lengthening-of-arteries-for-the-treatment-of-midaortic-syndrome-in-children
#16
Heung Bae Kim, Gabriel J Ramos-Gonzalez, Khashayar Vakili, Deborah R Stein, Michael A Ferguson, Diego Porras, James E Lock, Gulraiz Chaudry, Ahmad Alomari, Steven J Fishman
BACKGROUND: Midaortic syndrome (MAS) is a rare condition characterized by stenosis of the abdominal aorta. Patients with disease refractory to medical management will usually require either endovascular therapy or surgery with use of prosthetic graft material for bypass or patch angioplasty. We report our early experience with a novel approach using a tissue expander (TE) to lengthen the normal native arteries in children with MAS, allowing primary aortic repair without the need for prosthetic graft material...
January 13, 2018: Journal of Vascular Surgery
https://www.readbyqxmd.com/read/29342111/cytotoxicity-evaluation-of-turmeric-extract-incorporated-oil-in-water-nanoemulsion
#17
Hee Jeong Yoon, Xiaowei Zhang, Min Gyeong Kang, Gyeong Jin Kim, Sun Young Shin, Sang Hong Baek, Bom Nae Lee, Su Jung Hong, Jun Tae Kim, Kwonho Hong, Hojae Bae
To overcome the drawbacks of conventional drug delivery system, nanoemulsion have been developed as an advanced form for improving the delivery of active ingredients. However, safety evaluation is crucial during the development stage before the commercialization. Therefore, the aim of this study was to evaluate the cytotoxicity of two types of newly developed nanoemulsions. Turmeric extract-loaded nanoemulsion powder-10.6 (TE-NEP-10.6, high content of artificial surfactant Tween 80), which forms the optimal nanoemulsion, and the TE-NEP-8...
January 17, 2018: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/29341679/detection-of-the-spin-chemical-potential-in-topological-insulators-using-spin-polarized-four-probe-stm
#18
Saban M Hus, X-G Zhang, Giang D Nguyen, Wonhee Ko, Arthur P Baddorf, Yong P Chen, An-Ping Li
We demonstrate a new method for the detection of the spin-chemical potential in topological insulators using spin-polarized four-probe scanning tunneling microscopy on in situ cleaved Bi_{2}Te_{2}Se surfaces. Two-dimensional (2D) surface and 3D bulk conductions are separated quantitatively via variable probe-spacing measurements, enabling the isolation of the nonvanishing spin-dependent electrochemical potential from the Ohmic contribution. This component is identified as the spin-chemical potential arising from the 2D charge current through the spin momentum locked topological surface states (TSS)...
September 29, 2017: Physical Review Letters
https://www.readbyqxmd.com/read/29341677/current-nonlinear-hall-effect-and-spin-orbit-torque-magnetization-switching-in-a-magnetic-topological-insulator
#19
K Yasuda, A Tsukazaki, R Yoshimi, K Kondou, K S Takahashi, Y Otani, M Kawasaki, Y Tokura
The current-nonlinear Hall effect or second harmonic Hall voltage is widely used as one of the methods for estimating charge-spin conversion efficiency, which is attributed to the magnetization oscillation by spin-orbit torque (SOT). Here, we argue the second harmonic Hall voltage under a large in-plane magnetic field with an in-plane magnetization configuration in magnetic-nonmagnetic topological insulator (TI) heterostructures, Cr_{x}(Bi_{1-y}Sb_{y})_{2-x}Te_{3}/(Bi_{1-y}Sb_{y})_{2}Te_{3}, where it is clearly shown that the large second harmonic voltage is governed not by SOT but mainly by asymmetric magnon scattering without macroscopic magnetization oscillation...
September 29, 2017: Physical Review Letters
https://www.readbyqxmd.com/read/29340860/trace-element-phytoextraction-from-contaminated-soil-a-case-study-under-mediterranean-climate
#20
Werther Guidi Nissim, Emily Palm, Stefano Mancuso, Elisa Azzarello
The current field study aims to assess the suitability of four different plant species (i.e. poplar, willow, hemp and alfalfa) to be used for trace element (TE) (i.e. Cd, Cu, Ni, Pb and Zn) phytoextraction under hot-arid Mediterranean climate conditions. Plants were grown for two consecutive years on a moderate TE contaminated soil, supplied with water and mineral nutrients. The growth and physiological parameters were assessed throughout the trial to compare the response of plants to the environmental pollution, and TE uptake rates were measured for aboveground plant tissues...
January 16, 2018: Environmental Science and Pollution Research International
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