keyword
MENU ▼
Read by QxMD icon Read
search

3D scan

keyword
https://www.readbyqxmd.com/read/28821055/improvement-of-silicate-cement-properties-with-bacterial-cellulose-powder-addition-for-applications-in-dentistry
#1
Georgeta Voicu, Sorin-Ion Jinga, Bogdan-Gabriel Drosu, Cristina Busuioc
The goal of this paper was to synthesize a new family of composites starting from mineral binder powders and biocellulose membranes, with applications in endodontics. An important achievement consisted in the crushing of biocellulose 3D structure in a polygranular powder via an hydrothermal treatment. Afterwards, the polymer powder was mixed with silicate cement powders synthesized through the sol-gel technique. The resulting hybrid materials were investigated by thermal analysis, X-ray diffraction, scanning electron microscopy and mechanical measurements...
October 15, 2017: Carbohydrate Polymers
https://www.readbyqxmd.com/read/28820482/in-situ-synthesis-of-silver-nanoparticles-on-the-polyelectrolyte-coated-sericin-pva-film-for-enhanced-antibacterial-application
#2
Rui Cai, Gang Tao, Huawei He, Pengchao Guo, Meirong Yang, Chaoxiang Ding, Hua Zuo, Lingyan Wang, Ping Zhao, Yejing Wang
To develop silk sericin (SS) as a potential antibacterial biomaterial, a novel composite of polyelectrolyte multilayers (PEMs) coated sericin/poly(vinyl alcohol) (SS/PVA) film modified with silver nanoparticles (AgNPs) has been developed using a layer-by-layer assembly technique and ultraviolet-assisted AgNPs synthesis method. Ag ions were enriched by PEMs via the electrostatic attraction between Ag ions and PEMs, and then reduced to AgNPs in situ with the assistance of ultraviolet irradiation. PEMs facilitated the high-density growth of AgNPs and protected the synthesized AgNPs due to the formation of a 3D matrix, and thus endowed SS/PVA film with highly effective and durable antibacterial activity...
August 18, 2017: Materials
https://www.readbyqxmd.com/read/28819645/3d-imaging-of-optically-cleared-tissue-using-a-simplified-clarity-method-and-on-chip-microscopy
#3
Yibo Zhang, Yoonjung Shin, Kevin Sung, Sam Yang, Harrison Chen, Hongda Wang, Da Teng, Yair Rivenson, Rajan P Kulkarni, Aydogan Ozcan
High-throughput sectioning and optical imaging of tissue samples using traditional immunohistochemical techniques can be costly and inaccessible in resource-limited areas. We demonstrate three-dimensional (3D) imaging and phenotyping in optically transparent tissue using lens-free holographic on-chip microscopy as a low-cost, simple, and high-throughput alternative to conventional approaches. The tissue sample is passively cleared using a simplified CLARITY method and stained using 3,3'-diaminobenzidine to target cells of interest, enabling bright-field optical imaging and 3D sectioning of thick samples...
August 2017: Science Advances
https://www.readbyqxmd.com/read/28819250/oblique-scanning-laser-microscopy-for-simultaneously-volumetric-structural-and-molecular-imaging-using-only-one-raster-scan
#4
Lei Zhang, Amalia Capilla, Weiye Song, Gustavo Mostoslavsky, Ji Yi
Multi-modal three dimensional (3D) optical imaging combining both structural sensitivity and molecular specificity is highly desirable in biomedical research. In this paper, we present a method termed oblique scanning laser microscopy (OSLM) to combine optical coherence tomography (OCT), for simultaneously volumetric structural and molecular imaging with cellular resolution in all three dimensions. Conventional 3D laser scanning fluorescence microscopy requires repeated optical sectioning to create z-stacks in depth...
August 17, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28819229/cryo-em-analysis-of-homodimeric-full-length-lrrk2-and-lrrk1-protein-complexes
#5
Kushal Sejwal, Mohamed Chami, Hervé Rémigy, Renée Vancraenenbroeck, William Sibran, Rosmarie Sütterlin, Paul Baumgartner, Robert McLeod, Marie-Christine Chartier-Harlin, Veerle Baekelandt, Henning Stahlberg, Jean-Marc Taymans
Leucine-rich repeat kinase 2 (LRRK2) is a large multidomain protein implicated in the pathogenesis of both familial and sporadic Parkinson's disease (PD), and currently one of the most promising therapeutic targets for drug design in Parkinson's disease. In contrast, LRRK1, the closest homologue to LRRK2, does not play any role in PD. Here, we use cryo-electron microscopy (cryo-EM) and single particle analysis to gain structural insight into the full-length dimeric structures of LRRK2 and LRRK1. Differential scanning fluorimetry-based screening of purification buffers showed that elution of the purified LRRK2 protein in a high pH buffer is beneficial in obtaining high quality cryo-EM images...
August 17, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28818998/lower-body-negative-pressure-reduces-optic-nerve-sheath-diameter-during-head-down-tilt
#6
Karina Marshall-Goebel, Robert Terlević, Darius A Gerlach, Simone Kuehn, Edwin Mulder, Jörn Rittweger
The microgravity ocular syndrome (MOS) results in significant structural and functional ophthalmic changes during 6-month spaceflight missions consistent with an increase in cerebrospinal fluid (CSF) pressure compared to the preflight upright position. A ground-based study was performed to assess two of the major hypothesized contributors to MOS, headward fluid shifting and increased ambient CO2, on intracranial and periorbital CSF. In addition, lower body negative pressure (LBNP) was assessed as a countermeasure to headward fluid shifting...
August 17, 2017: Journal of Applied Physiology
https://www.readbyqxmd.com/read/28818107/patellofemoral-kinematics-in-dogs-with-cranial-cruciate-ligament-insufficiency-an-in-vivo-fluoroscopic-analysis-during-walking
#7
Stanley E Kim, Geoffrey J Zann, Selena Tinga, Erica J Moore, Antonio Pozzi, Scott A Banks
BACKGROUND: Complete rupture of the cranial cruciate ligament (CrCL) in dogs causes profound disturbance to stifle joint biomechanics. The objective of this study was to characterize the effects of cranial cruciate ligament (CrCL) insufficiency on patellofemoral (PF) kinematics in dogs during walking. Ten client-owned dogs (20-40 kg) with natural unilateral complete CrCL rupture were included. Dogs underwent computed tomographic scans to create digital bone-models of the patella and femur...
August 17, 2017: BMC Veterinary Research
https://www.readbyqxmd.com/read/28817195/vertical-off-centering-affects-organ-dose-in-chest-ct-evidence-from-monte-carlo-simulations-in-anthropomorphic-phantoms
#8
Natalia Saltybaeva, Hatem Alkadhi
PURPOSE: The objective of our study was to assess the effect of patient vertical off-centering on organ dose in chest CT with tube current modulation. METHODS: For this purpose, anthropomorphic phantoms representing adult male, female and overweight male were scanned on 192-slice CT scanner at eleven different vertical positions (maximal off-centering ± 5 cm). Monte Carlo simulations were performed for each of the investigated setup, using tube current values extracted from the raw data, in order to obtain 3D dose distributions...
August 17, 2017: Medical Physics
https://www.readbyqxmd.com/read/28816672/templateless-non-rigid-reconstruction-and-motion-tracking-with-a-single-rgb-d-camera
#9
Kangkan Wang, Guofeng Zhang, Shihong Xia
We present a novel templateless approach for nonrigid reconstruction and motion tracking using a single RGB-D camera. Without any template prior, our system achieves accurate reconstruction and tracking for considerably deformable objects. To robustly register the input sequence of partial depth scans with dynamic motion, we propose an efficient local-toglobal hierarchical optimization framework inspired by the idea of traditional structure-from-motion. Our proposed framework mainly consists of two stages, local nonrigid bundle adjustment and global optimization...
August 16, 2017: IEEE Transactions on Image Processing: a Publication of the IEEE Signal Processing Society
https://www.readbyqxmd.com/read/28816295/-three-dimensional-data-fusion-method-for-tooth-crown-and-root-based-on-curvature-continuity-algorithm
#10
Y J Zhao, Y Liu, Y C Sun, Y Wang
OBJECTIVE: To explore a three-dimensional (3D) data fusion and integration method of optical scanning tooth crowns and cone beam CT (CBCT) reconstructing tooth roots for their natural transition in the 3D profile. METHODS: One mild dental crowding case was chosen from orthodontics clinics with full denture. The CBCT data were acquired to reconstruct the dental model with tooth roots by Mimics 17.0 medical imaging software, and the optical impression was taken to obtain the dentition model with high precision physiological contour of crowns by Smart Optics dental scanner...
August 18, 2017: Beijing da Xue Xue Bao. Yi Xue Ban, Journal of Peking University. Health Sciences
https://www.readbyqxmd.com/read/28816292/-precision-of-three-dimensional-printed-brackets
#11
D Zhang, L C Wang, Y H Zhou, X M Liu, J Li
OBJECTIVE: This study was based on digital orthodontic diagnosis work flow for indirect bonding transfer tray model design and three-dimensional (3D) printing, and the aim of this paper was to inspect the dimensional accuracyof 3D printed brackets, which is the foundation of the follow up work and hoped that will illuminate the clinical application of the digital orthodontics work flow. METHODS: The samples which consisted of 14 cases of patients with malocclusion from Department of Orthodontics Peking University were selected, including 8 cases with tooth extraction and 6 cases without tooth extraction...
August 18, 2017: Beijing da Xue Xue Bao. Yi Xue Ban, Journal of Peking University. Health Sciences
https://www.readbyqxmd.com/read/28815472/comparison-of-pet-ct-and-whole-mount-histopathology-sections-of-the-human-prostate-a-new-strategy-for-voxel-wise-evaluation
#12
F Schiller, T Fechter, C Zamboglou, A Chirindel, N Salman, C A Jilg, V Drendel, M Werner, P T Meyer, A-L Grosu, M Mix
BACKGROUND: Implementation of PET/CT in diagnosis of primary prostate cancer (PCa) requires a profound knowledge about the tracer, preferably from a quantitative evaluation. Direct visual comparison of PET/CT slices to whole prostate sections is hampered by considerable uncertainties from imperfect coregistration and fundamentally different image modalities. In the current study, we present a novel method for advanced voxel-wise comparison of histopathology from excised prostates to pre-surgical PET...
August 17, 2017: EJNMMI Physics
https://www.readbyqxmd.com/read/28815110/development-of-a-framework-for-large-scale-three-dimensional-pathology-and-biomarker-imaging-and-spatial-analytics
#13
Yanhui Liang, Fusheng Wang, Pengyue Zhang, Joel H Saltz, Daniel J Brat, Jun Kong
With the rapid advancement in large-throughput scanning technologies, digital pathology has emerged as platform with promise for diagnostic approaches, but also for high-throughput quantitative data extraction and analysis for translational research. Digital pathology and biomarker images are rich sources of information on tissue architecture, cell diversity and morphology, and molecular pathway activation. However, the understanding of disease in three-dimension (3D) has been hampered by their traditional two-dimension (2D) representations on histologic slides...
2017: AMIA Summits on Translational Science Proceedings
https://www.readbyqxmd.com/read/28814706/-diagnostic-impact-of-3d-ct-with-retrograde-pyelography-for-ureteropelvic-junction-obstruction-a-case-report
#14
Kohei Takei, Hideyuki Abe, Daisaku Nishihara, Tomoya Mizuno, Yuumi Tokura, Issei Suzuki, Kazumasa Sakamoto, Hideo Yuki, Tsunehito Kambara, Hironori Betsunou, Masahiro Yashi, Yoshitatsu Fukabori, Takao Kamai, Kensuke Inamura, Yasukazu Shioyama, Yasushi Kaji
A 26-year-old woman presented to our hospital with right costovertebral angle (CVA) pain. Ultrasonographyand computed tomography(CT) scan indicated right hydronephrosis, and MAG3 renogram showed an obstructed pattern in the right kidney. Enhanced CT scan revealed an ureteropelvic junction obstruction (UPJO) with an aberrant vessel. To clarifythe ureteropelvic junction (UPJ) structure in detail, we utilized 3D-CT with retrograde pyelography (RP), which further revealed the true pinhole ureteral stricture of UPJ unaffected bythe aberrant vessel...
July 2017: Hinyokika Kiyo. Acta Urologica Japonica
https://www.readbyqxmd.com/read/28812871/high-performance-porous-molybdenum-oxynitride-based-fiber-supercapacitors
#15
Dan Ruan, Rui Lin, Kui Jiang, Xiang Yu, Yaofeng Zhu, Yaqin Fu, Zilong Wang, He Yan, Wenjie Mai
Scalable manufacturing of flexible, fiber-shaped energy storage devices has enabled great technological advances in wearable and portable technology. Replacing inefficient oxides with inexpensive and high-performance oxynitrides with more favourable 3D structures is critical if the practical applications of these technologies are to be realised. Here we developed a facile and controllable approach for the synthesis of 3D porous micropillars of molybdenum oxynitride, which exhibit high conductivity, robust stability and excellent energy storage properties...
August 16, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28811751/bioactive-potential-of-3d-printed-oleo-gum-resin-disks-b-papyrifera-c-myrrha-and-s-benzoin-loading-nanooxides-tio2-p25-cu2o-and-moo3
#16
Diogo José Horst, Sergio Mazurek Tebcherani, Evaldo Toniolo Kubaski, Rogério de Almeida Vieira
This experimental study investigates the bioactive potential of filaments produced via hot melt extrusion (HME) and intended for fused deposition modeling (FDM) 3D printing purposes. The oleo-gum-resins from benzoin, myrrha, and olibanum in pure state and also charged with 10% of metal oxide nanoparticles, TiO2, P25, Cu2O, and MoO3, were characterized by ultraviolet-visible (UV-Vis) and Fourier transform infrared (FTIR) spectroscopy, energy-dispersive X-ray microanalysis (EDXMA), scanning electron microscopy (SEM), and differential scanning calorimetry (DSC)...
2017: Bioinorganic Chemistry and Applications
https://www.readbyqxmd.com/read/28810162/standardized-anthropological-measurement-of-postcranial-bones-using-three-dimensional-models-in-cad-software
#17
Mikaela S Reynolds, Donna M MacGregor, Mark D Barry, Nicolene Lottering, Beat Schmutz, Lance J Wilson, Matthew Meredith, Laura S Gregory
This study introduces a standardized protocol for conducting linear measurements of postcranial skeletal elements using three-dimensional (3D) models constructed from post-mortem computed tomography (PMCT) scans. Using femoral DICOM datasets, reference planes were generated and plane-to-plane measurements were conducted on 3D surface rendered models. Bicondylar length, epicondylar breadth, anterior-posterior (AP) diameter, medial-lateral (ML) diameter and cortical area at the midshaft were measured by four observers to test the measurement error variance and observer agreement of the protocol (n=6)...
July 26, 2017: Forensic Science International
https://www.readbyqxmd.com/read/28809905/endoscopic-forward-viewing-optical-coherence-tomography-and-angiography-with-mhz-swept-source
#18
Kaicheng Liang, Osman O Ahsen, Zhao Wang, Hsiang-Chieh Lee, Wenxuan Liang, Benjamin M Potsaid, Tsung-Han Tsai, Michael G Giacomelli, Vijaysekhar Jayaraman, Hiroshi Mashimo, Xingde Li, James G Fujimoto
Endoscopic optical coherence tomography (OCT) instruments are mostly side viewing and rely on at least one proximal scan, thus limiting accuracy of volumetric imaging and en face visualization. Previous forward-viewing OCT devices had limited axial scan speeds. We report a forward-viewing fiber scanning 3D-OCT probe with 900 μm field of view and 5 μm transverse resolution, imaging at 1 MHz axial scan rate in the human gastrointestinal tract. The probe is 3.3 mm diameter and 20 mm rigid length, thus enabling passage through the endoscopic channel...
August 15, 2017: Optics Letters
https://www.readbyqxmd.com/read/28809838/easy-manipulation-of-architectures-in-protein-based-hydrogels-for-cell-culture-applications
#19
Nicholas Bodenberger, Dennis Kubiczek, Frank Rosenau
Hydrogels are recognized as promising materials for cell culture applications due to their ability to provide highly hydrated cell environments. The field of 3D templates is rising due to the potential resemblance of those materials to the natural extracellular matrix. Protein-based hydrogels are particularly promising because they can easily be functionalized and can achieve defined structures with adjustable physicochemical properties. However, the production of macroporous 3D templates for cell culture applications using natural materials is often limited by their weaker mechanical properties compared to those of synthetic materials...
August 4, 2017: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/28809697/geometric-and-photometric-consistency-in-a-mixed-video-and-galvanoscopic-scanning-laser-projection-mapping-system
#20
Petar Pjanic, Simon Willi, Anselm Grundhofer
We present a geometric calibration method to accurately register a galvanoscopic scanning laser projection system (GLP) based on 2D vector input data onto an arbitrarily complex 3D-shaped projection surface. This method allows for accurate merging of 3D vertex data displayed on the laser projector with geometrically calibrated standard rasterization-based video projectors that are registered to the same geometry. Because laser projectors send out a laser light beam via galvanoscopic mirrors, a standard pinhole model calibration procedure that is normally used for pixel raster displays projecting structured light patterns, such as Gray codes, cannot be carried out directly with sufficient accuracy as the rays do not converge into a single point...
August 10, 2017: IEEE Transactions on Visualization and Computer Graphics
keyword
keyword
71155
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"