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https://www.readbyqxmd.com/read/28214332/comparison-of-several-white-matter-tracts-in-feline-and-canine-brain-by-using-magnetic-resonance-diffusion-tensor-imaging
#1
Olivier Jacqmot, Bert Van Thielen, Alex Michotte, Inneke Willekens, Filip Verhelle, Peter Goossens, Filip De Ridder, Jan Pieter Clarys, Anne Vanbinst, Cindy Peleman, Johan de Mey
Recently, we published a first anatomical Diffusion Tensor Imaging (DTI) atlas regarding white matter tracts in the canine brain. The purpose of this study was to show the significance of DTI in the revelation of the white matter fibres in the feline brain (i.e. to obtain an anatomical DTI atlas of images) and to descriptively compare these to previously obtained white matter fibre images of the canine brain. DTI MR Images of 4 cats euthanised for reasons other than neurological disorders were obtained with a 3 T system...
February 18, 2017: Anatomical Record: Advances in Integrative Anatomy and Evolutionary Biology
https://www.readbyqxmd.com/read/28213793/automation-of-peak-tracking-analysis-of-stepwise-perturbed-nmr-spectra
#2
Tommaso Banelli, Marco Vuano, Federico Fogolari, Andrea Fusiello, Gennaro Esposito, Alessandra Corazza
We describe a new algorithmic approach able to automatically pick and track the NMR resonances of a large number of 2D NMR spectra acquired during a stepwise variation of a physical parameter. The method has been named Trace in Track (TINT), referring to the idea that a gaussian decomposition traces peaks within the tracks recognised through 3D mathematical morphology. It is capable of determining the evolution of the chemical shifts, intensity and linewidths of each tracked peak.The performances obtained in term of track reconstruction and correct assignment on realistic synthetic spectra were high above 90% when a noise level similar to that of experimental data were considered...
February 17, 2017: Journal of Biomolecular NMR
https://www.readbyqxmd.com/read/28211459/gravitational-body-forces-focus-north-american-intraplate-earthquakes
#3
Will Levandowski, Mark Zellman, Rich Briggs
Earthquakes far from tectonic plate boundaries generally exploit ancient faults, but not all intraplate faults are equally active. The North American Great Plains exemplify such intraplate earthquake localization, with both natural and induced seismicity generally clustered in discrete zones. Here we use seismic velocity, gravity and topography to generate a 3D lithospheric density model of the region; subsequent finite-element modelling shows that seismicity focuses in regions of high-gravity-derived deviatoric stress...
February 17, 2017: Nature Communications
https://www.readbyqxmd.com/read/28202996/-surgical-reconstruction-of-maxillary-defects-using-a-computer-assisted-techniques
#4
W B Zhang, Y Yu, Y Wang, X J Liu, C Mao, C B Guo, G Y Yu, X Peng
The maxilla is the most important bony support of the mid-face skeleton and is critical for both esthetics and function. Maxillary defects, resulting from tumor resection, can cause severe functional and cosmetic deformities. Furthermore, maxillary reconstruction presents a great challenge for oral and maxillofacial surgeons. Nowadays, vascularized composite bone flap transfer has been widely used for functional maxillary reconstruction. In the last decade, we have performed a comprehensive research on functional maxillary reconstruction with free fibula flap and reported excellent functional and acceptable esthetic results...
February 18, 2017: Beijing da Xue Xue Bao. Yi Xue Ban, Journal of Peking University. Health Sciences
https://www.readbyqxmd.com/read/28202257/radiofrequency-catheter-ablation-of-atrioventricular-node-reentrant-tachycardia-in-children-with-limited-fluoroscopy
#5
Moshe Swissa, Einat Birk, Tamir Dagan, Sody Abby Naimer, Michal Fogelman, Tom Einbinder, Elchanan Bruckheimer, Rami Fogelman
BACKGROUND: Limited fluoroscopy cryo-ablation using a 3D electro-anatomical system (3DS) has been used for AVNRT in children. We aimed to facilitate a fluoroscopy limited approach of RF ablation of AVNRT in children. METHODS: A retrospective study was performed of procedure parameters in children undergoing RF ablation of AVNRT in 75 consecutive children (June 2011 to November 2013 - Group A) using standard fluoroscopy techniques compared to those of 64 consecutive children (December 2013 to May 2015 - Group B), using a fluoroscopy limited approach with 3DS...
January 31, 2017: International Journal of Cardiology
https://www.readbyqxmd.com/read/28201731/radiofrequency-catheter-ablation-of-left-sided-accessory-pathways-in-children-using-a-new-fluoroscopy-integrated-3d-mapping-system
#6
Fabrizio Drago, Gino Grifoni, Romolo Remoli, Mario Salvatore Russo, Daniela Righi, Vincenzo Pazzano, Rosalinda Palmieri, Silvia Placidi, Fabio Anselmo Saputo, Massimo Stefano Silvetti
No abstract text is available yet for this article.
February 15, 2017: Europace: European Pacing, Arrhythmias, and Cardiac Electrophysiology
https://www.readbyqxmd.com/read/28199758/mechanical-trap-surface-enhanced-raman-spectroscopy-for-three-dimensional-surface-molecular-imaging-of-single-live-cells
#7
Qianru Jin, Ming Li, Beril Polat, Santosh K Paidi, Aimee Dai, Amy Zhang, Jayson V Pagaduan, Ishan Barman, David H Gracias
Reported is a new shell-based spectroscopic platform, named mechanical trap surface-enhanced Raman spectroscopy (MTSERS), for simultaneous capture, profiling, and 3D microscopic mapping of the intrinsic molecular signatures on the membrane of single live cells. By leveraging the functionalization of the inner surfaces of the MTs with plasmonic gold nanostars, and conformal contact of the cell membrane, MTSERS permits excellent signal enhancement, reliably detects molecular signatures, and allows non-perturbative, multiplex 3D surface imaging of analytes, such as lipids and proteins on the surface of single cells...
February 15, 2017: Angewandte Chemie
https://www.readbyqxmd.com/read/28198615/antibacterial-activities-of-graphene-oxide-molybdenum-disulfide-nanocomposite-films
#8
Tae In Kim, Buki Kwon, Jonghee Yoon, Ick-Joon Park, Gyeong Sook Bang, YongKeun Park, Yeon-Soo Seo, Sung-Yool Choi
Two-dimensional (2D) nanomaterials, such as graphene-based materials and transition metal dichalcogenide (TMD) nanosheets, are promising materials for biomedical applications owing to their remarkable cytocompatibility and physicochemical properties. Based on their potent antibacterial properties, 2D materials have potential as antibacterial films, wherein the 2D nanosheets are immobilized on the surface and the bacteria may contact with the basal planes of 2D nanosheets dominantly rather than contact with the sharp edges of nanosheets...
February 15, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28196133/b1-insensitive-t2-mapping-of-healthy-thigh-muscles-using-a-t2-prepared-3d-tse-sequence
#9
Elisabeth Klupp, Dominik Weidlich, Sarah Schlaeger, Thomas Baum, Barbara Cervantes, Marcus Deschauer, Hendrik Kooijman, Ernst J Rummeny, Claus Zimmer, Jan S Kirschke, Dimitrios C Karampinos
PURPOSE: To propose a T2-prepared 3D turbo spin echo (T2prep 3D TSE) sequence for B1-insensitive skeletal muscle T2 mapping and compare its performance with 2D and 3D multi-echo spin echo (MESE) for T2 mapping in thigh muscles of healthy subjects. METHODS: The performance of 2D MESE, 3D MESE and the proposed T2prep 3D TSE in the presence of transmit B1 and B0 inhomogeneities was first simulated. The thigh muscles of ten young and healthy subjects were then scanned on a 3 T system and T2 mapping was performed using the three sequences...
2017: PloS One
https://www.readbyqxmd.com/read/28192130/ielvis-an-open-source-matlab-toolbox-for-localizing-and-visualizing-human-intracranial-electrode-data
#10
David M Groppe, Stephan Bickel, Andrew R Dykstra, Xiuyuan Wang, Pierre Mégevand, Manuel R Mercier, Fred A Lado, Ashesh D Mehta, Christopher J Honey
BACKGROUND: Intracranial electrical recordings (iEEG) and brain stimulation (iEBS) are invaluable human neuroscience methodologies. However, the value of such data is often unrealized as many laboratories lack tools for localizing electrodes relative to anatomy. To remedy this, we have developed a MATLAB toolbox for intracranial electrode localization and visualization, iELVis. NEW METHOD: iELVis uses existing tools (BioImage Suite, FSL, and FreeSurfer) for preimplant magnetic resonance imaging (MRI) segmentation, neuroimaging coregistration, and manual identification of electrodes in postimplant neuroimaging...
February 9, 2017: Journal of Neuroscience Methods
https://www.readbyqxmd.com/read/28188484/estimation-of-attachment-regions-of-hip-muscles-in-ct-image-using-muscle-attachment-probabilistic-atlas-constructed-from-measurements-in-eight-cadavers
#11
Norio Fukuda, Yoshito Otake, Masaki Takao, Futoshi Yokota, Takeshi Ogawa, Keisuke Uemura, Ryota Nakaya, Kazunori Tamura, Robert B Grupp, Amirhossein Farvardin, Mehran Armand, Nobuhiko Sugano, Yoshinobu Sato
PURPOSE: Patient-specific musculoskeletal biomechanical simulation is useful in preoperative surgical planning and postoperative assessment in orthopedic surgery and rehabilitation medicine. A difficulty in application of the patient-specific musculoskeletal modeling comes from the fact that the muscle attachment regions are typically invisible in CT and MRI. Our purpose is to develop a method for estimating patient-specific muscle attachment regions from 3D medical images and to validate with cadaver experiments...
February 10, 2017: International Journal of Computer Assisted Radiology and Surgery
https://www.readbyqxmd.com/read/28187414/web-based-hybrid-dimensional-visualization-and-exploration-of-cytological-localization-scenarios
#12
Gökhan Kovanci, Mehmood Ghaffar, Björn Sommer
The CELLmicrocosmos 4.2 PathwayIntegration (CmPI) is a tool which provides hybrid-dimensional visualization and analysis of intracellular protein and gene localizations in the context of a virtual 3D environment. This tool is developed based on Java/Java3D/JOGL and provides a standalone application compatible to all relevant operating systems. However, it requires Java and the local installation of the software. Here we present the prototype of an alternative web-based visualization approach, using Three.js and D3...
December 21, 2016: Journal of Integrative Bioinformatics
https://www.readbyqxmd.com/read/28187250/phase-imaging-with-multiple-phase-cycled-balanced-steady-state-free-precession-at-9-4%C3%A2-t
#13
Jae-Woong Kim, Seong-Gi Kim, Sung-Hong Park
While phase imaging with a gradient echo (GRE) sequence is popular, phase imaging with balanced steady-state free precession (bSSFP) has been underexplored. The purpose of this study was to investigate anatomical and functional phase imaging with multiple phase-cycled bSSFP, in expectation of increasing spatial coverage of steep phase-change regions of bSSFP. Eight different dynamic 2D pass-band bSSFP studies at four phase-cycling (PC) angles and two TE /TR values were performed on rat brains at 9.4 T with electrical forepaw stimulation, in comparison with dynamic 2D GRE...
February 10, 2017: NMR in Biomedicine
https://www.readbyqxmd.com/read/28186001/observation-and-understanding-of-anisotropic-strain-relaxation-in-selectively-grown-sige-fin-structures
#14
Andreas Schulze, Roger Loo, Paul Ryan, Matthew Wormington, Paola Favia, Liesbeth Witters, Nadine Collaert, Hugo Bender, Wilfried Vandervorst, Matty Caymax
The performance of heterogeneous 3D transistor structures critically depends on the composition and strain state of the buffer, channel and source/drain regions. In this paper we used an in-line high resolution X-ray diffraction (HRXRD) tool to study in detail the composition and strain in selectively grown SiGe/Ge fin structures with widths down to 20nm. For this purpose we arranged fins of identical dimensions into larger arrays which were then analyzed using an X-ray beam several tens of micrometer in size...
February 10, 2017: Nanotechnology
https://www.readbyqxmd.com/read/28182719/context-adaptive-based-cu-processing-for-3d-hevc
#15
Liquan Shen, Ping An, Zhi Liu
The 3D High Efficiency Video Coding (3D-HEVC) standard aims to code 3D videos that usually contain multi-view texture videos and its corresponding depth information. It inherits the same quadtree prediction structure of HEVC to code both texture videos and depth maps. Each coding unit (CU) allows recursively splitting into four equal sub-CUs. At each CU depth level, it enables 10 types of inter modes and 35 types of intra modes in inter frames. Furthermore, the inter-view prediction tools are applied to each view in the test model of 3D-HEVC (HTM), which uses variable size disparity-compensated prediction to exploit inter-view correlation within neighbor views...
2017: PloS One
https://www.readbyqxmd.com/read/28182304/benign-prostatic-hyperplasia-after-prostatic-arterial-embolization-in-a-canine-model-a-3t-multiparametric-mri-and-whole-mount-step-section-pathology-correlated-longitudinal-study
#16
Basen Li, Anhui Xu, Nan Wang, Xiangde Min, Zhaoyan Feng, Ming Deng, Liang Li, Jie Cai, Zhen Kang, Kehua Jiang, Dong Kuang, Liang Wang
PURPOSE: To explore the morphological and functional characteristics of prostatic arterial embolization (PAE) in a canine model of benign prostatic hyperplasia (BPH) with 3T multiparametric magnetic resonance imaging (mp-MRI) and whole-mount step-section pathology correlation. MATERIALS AND METHODS: Eight adult male beagle dogs with hormone-induced BPH underwent 3T mp-MRI before and 1, 3, and 6 months after PAE, with subsequent whole-mount step-section pathologic assessment...
February 9, 2017: Journal of Magnetic Resonance Imaging: JMRI
https://www.readbyqxmd.com/read/28179166/macroanatomy-and-3d-probabilistic-atlas-of-the-human-insula
#17
Isabelle Faillenot, Rolf A Heckemann, Maud Frot, Alexander Hammers
The human insula is implicated in numerous functions. More and more neuroimaging studies focus on this region, however no atlas offers a complete subdivision of the insula in a reference space. The aims of this study were to define a protocol to subdivide insula, to create probability maps in the MNI152 stereotaxic space, and to provide normative reference volume measurements for these subdivisions. Six regions were manually delineated bilaterally on 3D T1 MR images of 30 healthy subjects: the three short gyri, the anterior inferior cortex, and the two long gyri...
February 4, 2017: NeuroImage
https://www.readbyqxmd.com/read/28176631/grid-based-continual-analysis-of-molecular-interior-for-drug-discovery-qsar-and-qspr
#18
A V Potemkin, M A Grishina, V A Potemkin
BACKGROUND: In 1979, R.D.Cramer and M.Milne made a first realization of the above mentioned principles attempting to compare molecules by aligning them in space and by mapping their molecular fields to a 3D grid. Further, this approach was developed as the DYLOMMS (DYnamic Lattice-Oriented Molecular Modelling System) approach. In 1984, H.Wold and S.Wold proposed the use of partial least squares (PLS) analysis, instead of principal component analysis, to correlate the field values with biological activities...
February 7, 2017: Current Drug Discovery Technologies
https://www.readbyqxmd.com/read/28167348/3d-functional-ultrasound-imaging-of-the-cerebral-visual-system-in-rodents
#19
Marc Gesnik, Kevin Blaize, Thomas Deffieux, Jean-Luc Gennisson, José-Alain Sahel, Mathias Fink, Serge Picaud, Mickaël Tanter
3D functional imaging of the whole brain activity during visual task is a challenging task in rodents due to the complex tri-dimensional shape of involved brain regions and the fine spatial and temporal resolutions required to reveal the visual tract. By coupling functional ultrasound (fUS) imaging with a translational motorized stage and an episodic visual stimulation device, we managed to accurately map and to recover the activity of the visual cortices, the Superior Colliculus (SC) and the Lateral Geniculate Nuclei (LGN) in 3D...
February 3, 2017: NeuroImage
https://www.readbyqxmd.com/read/28165473/cryosparc-algorithms-for-rapid-unsupervised-cryo-em-structure-determination
#20
Ali Punjani, John L Rubinstein, David J Fleet, Marcus A Brubaker
Single-particle electron cryomicroscopy (cryo-EM) is a powerful method for determining the structures of biological macromolecules. With automated microscopes, cryo-EM data can often be obtained in a few days. However, processing cryo-EM image data to reveal heterogeneity in the protein structure and to refine 3D maps to high resolution frequently becomes a severe bottleneck, requiring expert intervention, prior structural knowledge, and weeks of calculations on expensive computer clusters. Here we show that stochastic gradient descent (SGD) and branch-and-bound maximum likelihood optimization algorithms permit the major steps in cryo-EM structure determination to be performed in hours or minutes on an inexpensive desktop computer...
February 6, 2017: Nature Methods
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