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Essential imaging display

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https://www.readbyqxmd.com/read/28437967/design-of-see-through-near-eye-display-for-presbyopia
#1
Yishi Wu, Chao Ping Chen, Lei Zhou, Yang Li, Bing Yu, Huayi Jin
We propose a compact design of see-through near-eye display that is dedicated to presbyopia. Our solution is characterized by a plano-convex waveguide, which is essentially an integration of a corrective lens and two volume holograms. Its design rules are set forth in detail, followed by the results and discussion regarding the diffraction efficiency, field of view, modulation transfer function, distortion, and simulated imaging.
April 17, 2017: Optics Express
https://www.readbyqxmd.com/read/28428473/technical-considerations-on-scanning-and-image-analysis-for-amyloid-pet-in-dementia
#2
Go Akamatsu, Akihito Ohnishi, Kazuki Aita, Yasuhiko Ikari, Yasuji Yamamoto, Michio Senda
Brain imaging techniques, such as computed tomography (CT), magnetic resonance imaging (MRI), single photon emission computed tomography (SPECT), and positron emission tomography (PET), can provide essential and objective information for the early and differential diagnosis of dementia. Amyloid PET is especially useful to evaluate the amyloid-β pathological process as a biomarker of Alzheimer's disease. This article reviews critical points about technical considerations on the scanning and image analysis methods for amyloid PET...
2017: Nihon Hoshasen Gijutsu Gakkai Zasshi
https://www.readbyqxmd.com/read/28424513/super-multiplex-vibrational-imaging
#3
Lu Wei, Zhixing Chen, Lixue Shi, Rong Long, Andrew V Anzalone, Luyuan Zhang, Fanghao Hu, Rafael Yuste, Virginia W Cornish, Wei Min
The ability to visualize directly a large number of distinct molecular species inside cells is increasingly essential for understanding complex systems and processes. Even though existing methods have successfully been used to explore structure-function relationships in nervous systems, to profile RNA in situ, to reveal the heterogeneity of tumour microenvironments and to study dynamic macromolecular assembly, it remains challenging to image many species with high selectivity and sensitivity under biological conditions...
April 19, 2017: Nature
https://www.readbyqxmd.com/read/28414994/adapting-the-body-appreciation-scale-2-for-children-a-psychometric-analysis-of-the-bas-2c
#4
Emma Halliwell, Hannah Jarman, Tracy Tylka, Amy Slater
Positive body image among adults is related to numerous indicators of well-being. However, no research has explored body appreciation among children. To facilitate our understanding of children's positive body image, the current study adapts and validates the Body Appreciation Scale-2 (BAS-2; Tylka & Wood-Barcalow, 2015a) for use with children. Three hundred and forty-four children (54.4% girls) aged 9-11 completed the adapted Body Appreciation Scale-2 for Children (BAS-2C) alongside measures of body esteem, media influence, body surveillance, mood, and dieting...
April 14, 2017: Body Image
https://www.readbyqxmd.com/read/28392461/recombinant-egfr-mmp-2-bi-targeted-fusion-protein-markedly-binding-to-non-small-cell-lung-carcinoma-and-exerting-potent-therapeutic-efficacy
#5
Jian Xu, Yue Du, Xiu-Jun Liu, Bing-Yan Zhu, Sheng-Hua Zhang, Liang Li, Yi Li, Xiao-Fei Wang, Chuan-Kun Shan, Rui-Qi Wang, Yong-Su Zhen
Overexpression of EGFR and MMP-2 plays an essential role in the initiation and progression of non-small-cell lung carcinoma (NSCLC). In this study, a novel format of EGFR/MMP-2 bi-targeted fusion protein Ec-LDP-TIMP2 and its enediyne-integrated analogue Ec-LDP(AE)-TIMP2 have been prepared by genetic engineering and molecular reconstitution. The Ec-LDP(AE)-TIMP2 comprises endogenous inhibitor of matrix metalloproteinase 2 (TIMP2), EGF-derived oligopeptide (Ec), lidamycin apoprotein (LDP), and the extremely potent cytotoxic enediyne (AE)...
April 6, 2017: Pharmacological Research: the Official Journal of the Italian Pharmacological Society
https://www.readbyqxmd.com/read/28358291/feasibility-and-utility-of-an-integrated-medical-imaging-and-informatics-smartphone-system-for-management-of-acute-stroke
#6
Kristina Shkirkova, Eftitan Y Akam, Josephine Huang, Sunil A Sheth, May Nour, Conrad W Liang, Michael McManus, Van Trinh, Gary Duckwiler, Jason Tarpley, Fernando Vinuela, Jeffrey L Saver
Background Rapid dissemination and coordination of clinical and imaging data among multidisciplinary team members are essential for optimal acute stroke care. Aim To characterize the feasibility and utility of the Synapse Emergency Room mobile (Synapse ERm) informatics system. Methods We implemented the Synapse ERm system for integration of clinical data, computerized tomography, magnetic resonance, and catheter angiographic imaging, and real-time stroke team communications, in consecutive acute neurovascular patients at a Comprehensive Stroke Center...
January 1, 2017: International Journal of Stroke: Official Journal of the International Stroke Society
https://www.readbyqxmd.com/read/28356535/phosphatidylserine-lateral-organization-influences-the-interaction-of-influenza-matrix-protein-1-with-lipid-membranes
#7
Sara Bobone, Malte Hilsch, Julian Storm, Valentin Dunsing, Andreas Herrmann, Salvatore Chiantia
Influenza A Virus Matrix Protein 1 (M1) is an essential component involved in the structural stability of the virus and in the budding of new virions from infected cells. A deeper understanding of the molecular basis of virion formation and budding process is required in order to devise new therapeutic approaches. We investigated in details the interaction between M1 and phosphatidylserine (PS) (i.e., its main binding target at the plasma membrane (PM)), as well as the distribution of PS itself, both in model membranes and in living cells...
March 29, 2017: Journal of Virology
https://www.readbyqxmd.com/read/28351046/retinal-vein-occlusions
#8
Jost B Jonas, Jordi Monés, Agnès Glacet-Bernard, Gabriel Coscas
Retinal vein occlusions (RVOs) have been defined as retinal vascular disorders characterized by dilatation of retinal veins with retinal and subretinal hemorrhages, macular edema, and a varying degree of retinal ischemia. Retinal angiography, either as fluorescein and indocyanine green (ICG) angiography or in the form of optical coherence tomography (OCT)-based angiography, is essential for the diagnosis and assessment of the prognosis of RVOs. It allows the differentiation of diverse types of RVOs, such as perfused or nonperfused, as well as the detection of different modalities in the natural history of RVOs...
2017: Developments in Ophthalmology
https://www.readbyqxmd.com/read/28339120/accessing-structurally-diverse-near-infrared-cyanine-dyes-for-folate-receptor-targeted-cancer-cell-staining
#9
Sandra G König, Roland Krämer
Folate receptor (FR) targeting is one of the most promising strategies for the development of small-molecule based cancer imaging agents since the FR is highly overexpressed on the surface of many cancer cell types. FR-targeted conjugates of NIR emissive cyanine dyes are in advanced clinical trials for fluorescence-guided surgery and are valuable research tools for optical molecular imaging in animal models. Only a small number of promising conjugates has been evaluated so far. Analysis of structure-performance relations to identify critical factors modulating the performance of targeted conjugates is essential for successful further optimization...
March 24, 2017: Chemistry: a European Journal
https://www.readbyqxmd.com/read/28287511/magnetic-levitation-coupled-with-portable-imaging-and-analysis-for-disease-diagnostics
#10
Stephanie M Knowlton, Bekir Yenilmez, Reza Amin, Savas Tasoglu
Currently, many clinical diagnostic procedures are complex, costly, inefficient, and inaccessible to a large population in the world. The requirements for specialized equipment and trained personnel require that many diagnostic tests be performed at remote, centralized clinical laboratories. Magnetic levitation is a simple yet powerful technique and can be applied to levitate cells, which are suspended in a paramagnetic solution and placed in a magnetic field, at a position determined by equilibrium between a magnetic force and a buoyancy force...
February 19, 2017: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/28275728/assembly-of-mesoscale-helices-with-near-unity-enantiomeric-excess-and-light-matter-interactions-for-chiral-semiconductors
#11
Wenchun Feng, Ji-Young Kim, Xinzhi Wang, Heather A Calcaterra, Zhibei Qu, Louisa Meshi, Nicholas A Kotov
Semiconductors with chiral geometries at the nanoscale and mesoscale provide a rich materials platform for polarization optics, photocatalysis, and biomimetics. Unlike metallic and organic optical materials, the relationship between the geometry of chiral semiconductors and their chiroptical properties remains, however, vague. Homochiral ensembles of semiconductor helices with defined geometries open the road to understanding complex relationships between geometrical parameters and chiroptical properties of semiconductor materials...
March 2017: Science Advances
https://www.readbyqxmd.com/read/28265738/radiolabeled-pertuzumab-for-imaging-of-human-epidermal-growth-factor-receptor-2-expression-in-ovarian-cancer
#12
Dawei Jiang, Hyung-Jun Im, Haiyan Sun, Hector F Valdovinos, Christopher G England, Emily B Ehlerding, Robert J Nickles, Dong Soo Lee, Steve Y Cho, Peng Huang, Weibo Cai
PURPOSE: Human epidermal growth factor receptor 2 (HER2) is over-expressed in over 30% of ovarian cancer cases, playing an essential role in tumorigenesis and metastasis. Non-invasive imaging of HER2 is of great interest for physicians as a mean to better detect and monitor the progression of ovarian cancer. In this study, HER2 was assessed as a biomarker for ovarian cancer imaging using (64)Cu-labeled pertuzumab for immunoPET imaging. METHODS: HER2 expression and binding were examined in three ovarian cancer cell lines (SKOV3, OVCAR3, Caov3) using in vitro techniques, including western blot and saturation binding assays...
March 6, 2017: European Journal of Nuclear Medicine and Molecular Imaging
https://www.readbyqxmd.com/read/28261083/automatic-and-precise-localization-and-cortical-labeling-of-subdural-and-depth-intracranial-electrodes
#13
Chaoyi Qin, Zheng Tan, Yali Pan, Yanyan Li, Lin Wang, Liankun Ren, Wenjing Zhou, Liang Wang
Object: Subdural or deep intracerebral electrodes are essential in order to precisely localize epileptic zone in patients with medically intractable epilepsy. Precise localization of the implanted electrodes is critical to clinical diagnosing and treatment as well as for scientific studies. In this study, we sought to automatically and precisely extract intracranial electrodes using pre-operative MRI and post-operative CT images. Method: The subdural and depth intracranial electrodes were readily detected using clustering-based segmentation...
2017: Frontiers in Neuroinformatics
https://www.readbyqxmd.com/read/28193694/different-cav1-3-channel-isoforms-control-distinct-components-of-the-synaptic-vesicle-cycle-in-auditory-inner-hair-cells
#14
Philippe Fy Vincent, Yohan Bouleau, Gilles Charpentier, Alice Emptoz, Saaid Safieddine, Christine Petit, Didier Dulon
The mechanisms orchestrating transient and sustained exocytosis in auditory inner hair cells (IHCs) remain largely unknown. These exocytotic responses are believed to mobilize sequentially a readily releasable pool of vesicles (RRP) underneath the synaptic ribbons and a slowly releasable pool of vesicles (SRP) at farther distance from them. They are both governed by Cav1.3 channels and require otoferlin as Ca(2+) sensor but whether they use the same Cav1.3 isoforms is still unknown. Using whole cell patch clamp recordings in post-hearing mice, we show that only a proportion (∼25 %) of the total Ca(2+) current in IHCs, displaying fast inactivation and resistance to 20 μM nifedipine, a L-type Ca(2+) channel blocker, is sufficient to trigger RRP but not SRP exocytosis...
February 13, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/28193561/hydrophobic-carbon-dot-based-dual-emission-micelle-for-ratiometric-fluorescence-biosensing-and-imaging-of-cu-2-in-liver-cells
#15
Linlin Lu, Chongchong Feng, Jie Xu, Fengyang Wang, Haijun Yu, Zhiai Xu, Wen Zhang
Copper is closely related to liver damage, therefore, it is essential to develop a simple and sensitive strategy to detect copper ions (Cu(2+)) in liver cells. A hydrophobic carbon dots (HCDs)-based dual-emission fluorescent probe for Cu(2+) was prepared by encapsulating HCDs in micelles formed by self-assembly of amphiphilic polymer DSPE-PEG and tetrakis (4-carboxyphenyl) porphyrin (TCPP)-modified DSPE-PEG. The obtained probe showed characteristic fluorescence emissions of HCDs and TCPP with large emission shift of 170nm with single-wavelength excitation...
June 15, 2017: Biosensors & Bioelectronics
https://www.readbyqxmd.com/read/28185189/culture-transfection-and-immunocytochemical-analysis-of-primary-macrophages
#16
Charles A Warwick, Yuriy M Usachev
Macrophages are the primary phagocytes of the body and found in every tissue; often with tissue specific subtypes, e.g., microglia or Kupffer Cells. These cells are essential players in host defense, immune regulation, tissue repair, and homeostasis. Consistent with their diverse functions, macrophages display a remarkable level of plasticity and undergo rapid changes in morphology and activation state in response to environmental cues. Polarization of macrophages towards pro-inflammatory (classically activated or M1) or anti-inflammatory (alternatively activated or M2) activation states is highly dependent on their environment...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/28174566/application-of-a-dot-blot-hybridization-platform-to-assess-streptococcus-uberis-population-structure-in-dairy-herds
#17
Pedro Albuquerque, Niza Ribeiro, Alexandre Almeida, Irena Panschin, Afonso Porfirio, Marta Vales, Francisca Diniz, Helena Madeira, Fernando Tavares
Streptococcus uberis is considered one of the most important pathogens associated with bovine mastitis. While traditionally acknowledged as an environmental pathogen, S. uberis has been shown to adopt a contagious epidemiological pattern in several dairy herds. Since different control strategies are employed depending on the mode of transmission, in-depth studies of S. uberis populations are essential to determine the best practices to control this pathogen. In this work, we optimized and validated a dot blot platform, combined with automatic image analysis, to rapidly assess the population structure of infective S...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28110654/applications-of-mass-spectrometry-imaging-to-cancer
#18
G Arentz, P Mittal, C Zhang, Y-Y Ho, M Briggs, L Winderbaum, M K Hoffmann, P Hoffmann
Pathologists play an essential role in the diagnosis and prognosis of benign and cancerous tumors. Clinicians provide tissue samples, for example, from a biopsy, which are then processed and thin sections are placed onto glass slides, followed by staining of the tissue with visible dyes. Upon processing and microscopic examination, a pathology report is provided, which relies on the pathologist's interpretation of the phenotypical presentation of the tissue. Targeted analysis of single proteins provide further insight and together with clinical data these results influence clinical decision making...
2017: Advances in Cancer Research
https://www.readbyqxmd.com/read/28063817/pulse-sequence-considerations-for-simulation-and-postimplant-dosimetry-of-prostate-brachytherapy
#19
Jingfei Ma, Marinus A Moerland, Aradhana M Venkatesan, Tharakeswara K Bathala, Rajat J Kudchadker, Kristy K Brock, Steven J Frank
PURPOSE: The purpose of this work is to present a brief review of MRI physics principles pertinent to prostate brachytherapy, and a summary of our experience in optimizing protocols for prostate brachytherapy applications. METHODS AND MATERIALS: We summarized essential MR imaging characteristics and their interplays that need to be considered for prostate brachytherapy applications. These include spatial resolution, signal-to-noise ratio, image contrast, artifacts, geometric distortion, specific absorption rate, and total scan time...
January 4, 2017: Brachytherapy
https://www.readbyqxmd.com/read/28059343/field-symmetrization-to-solve-luminance-deviation-between-frames-in-a-low-frequency-driven-fringe-field-switching-liquid-crystal-cell
#20
Min Su Kim, Philip J Bos, Dong-Woo Kim, Chang-Min Keum, Deng-Ke Yang, Hyeong Gyun Ham, Kwang-Un Jeong, Joong Hee Lee, Seung Hee Lee
The development of low-frequency-driven liquid crystal displays (LCDs) has recently received intense attention to open up low-power consumption display devices, such as portable displays, advertising panels and price tags. In fringe-field switching (FFS) LCD mode, a unidirectional electric field gives rise to head-tail symmetry breaking in liquid crystals, so that the flexoelectric effect, a coupling between the elastic distortion and the electric polarization, becomes enormously significant. The effect is thus linked to an unusual optical effect, which badly damages the quality of images by image-flickering, and this image-flickering is mainly caused by transmittance difference between the applied signal frames...
December 26, 2016: Optics Express
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