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3D graphics

Alexey Chistyakov, Maria Teresa Soto, Enric Martí, Jordi Carrabina
The benefits of stereoscopic vision in medical applications were appreciated and have been thoroughly studied for more than a century. The usage of the stereoscopic displays has a proven positive impact on performance in various medical tasks. At the same time the market of 3D-enabled technologies is blooming. New high resolution stereo cameras, TVs, projectors, monitors, and head mounted displays become available. This equipment, completed with a corresponding application program interface (API), could be relatively easy implemented in a system...
December 2016: Journal of Medical Systems
Jee Hoon Kim, Joon Woo Lee, Tae In Ahn, Jong Hwa Shin, Kyung Sub Park, Jung Eek Son
Canopy photosynthesis has typically been estimated using mathematical models that have the following assumptions: the light interception inside the canopy exponentially declines with the canopy depth, and the photosynthetic capacity is affected by light interception as a result of acclimation. However, in actual situations, light interception in the canopy is quite heterogenous depending on environmental factors such as the location, microclimate, leaf area index, and canopy architecture. It is important to apply these factors in an analysis...
2016: Frontiers in Plant Science
Simone L Vernez, Zhamshid Okhunov, Jamie Wikenheiser, Cyrus Khoyilar, Rahul Dutta, Kathryn Osann, Kamaljot Kaler, Thomas K Lee, Ralph V Clayman, Jaime Landman
PURPOSE: We sought to characterize and three-dimensionally reconstruct the distribution of the autonomic innervation of the human ureter. MATERIALS AND METHODS: Three male and three female pairs of ureters were evaluated at 2 mm serial transverse sections along the entire length of the ureter. The location of nerve tissue was immunohistochemically identified using the neuronal marker, S100 protein, and ImageJ software was used to calculate nerve count and density in the adventitia and smooth muscle...
September 14, 2016: Journal of Urology
Luis D Lledó, Jorge A Díez, Arturo Bertomeu-Motos, Santiago Ezquerro, Francisco J Badesa, José M Sabater-Navarro, Nicolás García-Aracil
Post-stroke neurorehabilitation based on virtual therapies are performed completing repetitive exercises shown in visual electronic devices, whose content represents imaginary or daily life tasks. Currently, there are two ways of visualization of these task. 3D virtual environments are used to get a three dimensional space that represents the real world with a high level of detail, whose realism is determinated by the resolucion and fidelity of the objects of the task. Furthermore, 2D virtual environments are used to represent the tasks with a low degree of realism using techniques of bidimensional graphics...
2016: Frontiers in Aging Neuroscience
Yusu Ni, Kaishi Wang, Yi Jiang, Ren Zhou, Yan Sha, Huawei Li
OBJECTIVE: To explore and quantify the surgically relevant anatomic relationships and three-dimensional (3D) morphology of the supralabyrinthine space, and enable a deeper, clearer understanding of its regional anatomy. MATERIALS AND METHODS: 3D-DOCTOR software was used to create a 3D reconstruction of the axial CT images and multiplanar reformatting of 55 slices of temporal bone in 29 patients (17 males and 12 females), whose average age was 38.69 ± 17.81 years...
September 10, 2016: ORL; Journal for Oto-rhino-laryngology and its related Specialties
Nathalie Lagarde, Solenne Delahaye, Jean-François Zagury, Matthieu Montes
Nuclear receptors (NRs) constitute an important class of therapeutic targets. We evaluated the performance of 3D structure-based and ligand-based pharmacophore models in predicting the pharmacological profile of NRs ligands using the NRLiSt BDB database. We could generate selective pharmacophores for agonist and antagonist ligands and we found that the best performances were obtained by combining the structure-based and the ligand-based approaches. The combination of pharmacophores that were generated allowed to cover most of the chemical space of the NRLiSt BDB datasets...
2016: Journal of Cheminformatics
R Beveridge, S Wilson, D Coyle
A brain-computer interface (BCI) offers movement-free control of a computer application and is achieved by reading and translating the cortical activity of the brain into semantic control signals. Motion-onset visual evoked potentials (mVEP) are neural potentials employed in BCIs and occur when motion-related stimuli are attended visually. mVEP dynamics are correlated with the position and timing of the moving stimuli. To investigate the feasibility of utilizing the mVEP paradigm with video games of various graphical complexities including those of commercial quality, we conducted three studies over four separate sessions comparing the performance of classifying five mVEP responses with variations in graphical complexity and style, in-game distractions, and display parameters surrounding mVEP stimuli...
2016: Progress in Brain Research
T Hoang Nguyen Vo, Ngan Tran, Dat Nguyen, Ly Le
Herbal medicines have become strongly preferred treatment to reduce the negative impacts of diabetes mellitus (DM) and its severe complications due to lesser side effects and low cost. Recently, strong anti-hyperglycemic effect of Euphorbia thymifolia Linn. (E. thymifolia) on mice models has reported but the action mechanism of its bioactive compounds has remained unknown. This study aimed to evaluate molecular interactions existing between various bioactive compounds in E. thymifolia and targeted proteins related to Type 2 DM...
2016: SpringerPlus
V K Rana, S Rudin, D R Bednarek
PURPOSE: Neurovascular interventional procedures using biplane fluoroscopic imaging systems can lead to increased risk of radiation-induced skin injuries. The authors developed a biplane dose tracking system (Biplane-DTS) to calculate the cumulative skin dose distribution from the frontal and lateral x-ray tubes and display it in real-time as a color-coded map on a 3D graphic of the patient for immediate feedback to the physician. The agreement of the calculated values with the dose measured on phantoms was evaluated...
September 2016: Medical Physics
Quentin P Vanbellingen, Anthony Castellanos, Monica Rodriguez-Silva, Iru Paudel, Jeremy W Chambers, Francisco A Fernandez-Lima
In this work, we show the advantages of label-free, tridimensional mass spectrometry imaging using dual beam analysis (25 keV Bi3 (+)) and depth profiling (20 keV with a distribution centered at Ar1500 (+)) coupled to time of flight secondary ion mass spectrometry (3D-MSI-TOF-SIMS) for the study of A-172 human glioblastoma cell line treated with B-cell lymphoma 2 (Bcl-2) inhibitor ABT-737. The high spatial (~250 nm) and high mass resolution (m/Δm ~10,000) of TOF-SIMS permitted the localization and identification of the intact, unlabeled drug molecular ion (m/z 811...
August 31, 2016: Journal of the American Society for Mass Spectrometry
G W Griffiths, Ł Płociniczak, W E Schiesser
In part I we discussed the solution of corneal curvature using a 2D meshless method based on radial basis functions (RBFs). In Part II we use these methods to fit a full nonlinear thin membrane model to a measured data-set in order to generate a topological mathematical description of the cornea. In addition, we show how these results can lead to estimations for corneal radius of curvature and certain physical properties of the cornea; namely, tension and elasticity coefficient. Again all calculations and graphics generation were performed using the R language programming environment...
October 1, 2016: Computers in Biology and Medicine
Ivan Evangelista do Vale Coelho, Denise Costa Arruda, Alex Gutterres Taranto
The incidence of skin cancer has increased in recent decades, and melanoma is the most aggressive form with the lowest chance of successful treatment. Currently, drug design projects are in progress, but available treatments against metastatic melanoma have not significantly increased survival, and few patients are cured. Thus, new therapeutic agents should be developed as more effective therapeutic options for melanoma. High levels of the BRN2 transcription factor have been related to melanoma development...
September 2016: Journal of Molecular Modeling
A Prlić, T Kalro, R Bhattacharya, C Christie, S K Burley, P W Rose
: The Protein Data Bank (PDB) now contains more than 120,000 three-dimensional (3D) structures of biological macromolecules. To allow an interpretation of how PDB data relates to other publicly available annotations, we developed a novel data integration platform that maps 3D structural information across various datasets. This integration bridges from the human genome across protein sequence to 3D structure space. We developed novel software solutions for data management and visualization, while incorporating new libraries for web-based visualization using SVG graphics...
August 22, 2016: Bioinformatics
Agustina Arroyuelo, Jorge A Vila, Osvaldo A Martin
Glycans are key molecules in many physiological and pathological processes. As with other molecules, like proteins, visualization of the 3D structures of glycans adds valuable information for understanding their biological function. Hence, here we introduce Azahar, a computing environment for the creation, visualization and analysis of glycan molecules. Azahar is implemented in Python and works as a plugin for the well known PyMOL package (Schrodinger in The PyMOL molecular graphics system, version 1.3r1, 2010)...
August 2016: Journal of Computer-aided Molecular Design
Alberto Zanella, Domenico Salerno, Vittorio Scaravilli, Marco Giani, Luigi Castagna, Federico Magni, Eleonora Carlesso, Paolo Cadringher, Michela Bombino, Giacomo Grasselli, Nicolò Patroniti, Antonio Pesenti
PURPOSE: To develop a mathematical model of oxygenation during venovenous extracorporeal membrane oxygenation (vv-ECMO). MATERIAL AND METHODS: Total oxygen consumption, cardiac output, blood flow, recirculation, intrapulmonary shunt, hemoglobin, natural lung, and membrane lung oxygen fractions were chosen as inputs. Content, partial pressure, and hemoglobin saturation of oxygen in arterial, venous, pulmonary, and extracorporeal blood were outputs. To assess accuracy and predictive power of the model, we retrospectively analyzed data of 25 vv-ECMO patients...
July 15, 2016: Journal of Critical Care
Lorias Espinoza Daniel, Vicente González Carranza, Fernando Chico Ponce de León, Fernando Pérez Escamirosa, Arturo Minor Martinez
BACKGROUND: Navigation technology is used for training in various medical specialties, not least image-guided spinal interventions. Navigation practice is an important educational component that allows residents to understand how surgical instruments interact with complex anatomy and to learn basic surgical skills such as the tri-dimensional mental interpretation of bi-dimensional data. However, inexpensive surgical simulators for spinal surgery are lacking. We therefore designed a low-cost spinal surgery simulator (Spine MovDigSys 01) to allow 3D navigation using 2D images without altering or limiting the surgeon's natural movement...
August 12, 2016: World Neurosurgery
David F Thieker, Jodi A Hadden, Klaus Schulten, Robert J Woods
No abstract text is available yet for this article.
August 2016: Glycobiology
Bruno Paun, Bart Bijnens, Tinen Iles, Paul A Iaizzo, Constantine Butakoff
Reparameterization of surfaces is a widely used tool in computer graphics known mostly from the remeshing algorithms. Recently, the surface reparameterization techniques started to gain popularity in the field of medical imaging, but mostly for convenient 2D visualization of the information initially represented on 3D surfaces (e.g. continuous bulls-eye plot). However, by consistently mapping the 3D information to the same 2D domain, surface reparameterization techniques allow us to put into correspondence anatomical shapes of inherently different geometry...
July 21, 2016: Medical Image Analysis
Bo Shuang, Wenxiao Wang, Hao Shen, Lawrence J Tauzin, Charlotte Flatebo, Jianbo Chen, Nicholas A Moringo, Logan D C Bishop, Kevin F Kelly, Christy F Landes
Super-resolution microscopy with phase masks is a promising technique for 3D imaging and tracking. Due to the complexity of the resultant point spread functions, generalized recovery algorithms are still missing. We introduce a 3D super-resolution recovery algorithm that works for a variety of phase masks generating 3D point spread functions. A fast deconvolution process generates initial guesses, which are further refined by least squares fitting. Overfitting is suppressed using a machine learning determined threshold...
2016: Scientific Reports
Jung-Ge Tseng, Bo-Wun Huang, Yi-Wen Ou, Ke-Tien Yen, Yi-Te Wu
The brain is one of the most vulnerable organs inside the human body. Head accidents often appear in daily life and are easy to cause different level of brain damage inside the skull. Once the brain suffered intense locomotive impact, external injuries, falls, or other accidents, it will result in different degrees of concussion. This study employs finite element analysis to compare the dynamic characteristics between the geometric models of an assumed simple brain tissue and a brain tissue with complex cerebral sulci...
July 3, 2016: Bioengineered
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