keyword
MENU ▼
Read by QxMD icon Read
search

3D scan

keyword
https://www.readbyqxmd.com/read/29168877/full-angle-tomographic-phase-microscopy-of-flowing-quasi-spherical-cells
#1
Massimiliano M Villone, Pasquale Memmolo, Francesco Merola, Martina Mugnano, Lisa Miccio, Pier Luca Maffettone, Pietro Ferraro
We report a reliable full-angle tomographic phase microscopy (FA-TPM) method for flowing quasi-spherical cells along microfluidic channels. This method lies in a completely passive optical system, i.e. mechanical scanning or multi-direction probing of the sample is avoided. It exploits the engineered rolling of cells while they are flowing along a microfluidic channel. Here we demonstrate significant progress with respect to the state of the art of in-flow TPM by showing a general extension to cells having almost spherical shapes while they are flowing in suspension...
November 23, 2017: Lab on a Chip
https://www.readbyqxmd.com/read/29168308/demonstrating-improved-multiple-transport-mean-free-path-imaging-capabilities-of-light-sheet-microscopy-in-the-quantification-of-fluorescence-dynamics
#2
Matthias Rieckher, Stylianos Psycharakis, Daniele Ancora, Evangelos Liapis, Athanasios Zacharopoulos, Jorge Ripoll, Nektarios Tavernarakis, Giannis Zacharakis
Optical microscopy constitutes one of the most fundamental paradigms for the understanding of complex biological mechanisms in the whole-organism and live-tissue context. Novel imaging techniques such as light sheet fluorescence microscopy (LSFM) and optical projection tomography (OPT) combined with phase-retrieval algorithms (PRT) can produce highly-resolved 3D images in multiple transport-mean-free-path scales. Our study aims to exemplify the microscopic capabilities of LSFM when imaging protein dynamics in Caenorhabditis elegans and the distribution of necrotic cells in cancer cell spheroids...
November 23, 2017: Biotechnology Journal
https://www.readbyqxmd.com/read/29167984/x-ray-micro-computed-tomography-in-pediatric-surgery-a-new-tool-for-studying-embryos
#3
Susann Brosig, N Peukert, R Metzger, H Schneider, R Haak, J Gosemann, M Lacher, D Kluth
PURPOSE: The embryology of common congenital malformations is discussed controversially. Studies are hampered by a shortage of study material and techniques which require partial or complete preparation and therewith destruction of embryos. X-ray micro-computed-tomography (µCT) is a technical opportunity keeping the embryos intact. Thus, the aim of this study was to assess the applicability of µCT in embryonic research compared to the anatomical information obtained by scanning electron microscopy (SEM)...
November 22, 2017: Pediatric Surgery International
https://www.readbyqxmd.com/read/29167708/tooth-abnormalities-in-individuals-with-unilateral-alveolar-clefts-a-comparison-between-sides-using-cone-beam-computed-tomography
#4
Bruno-Torres Bezerra, John-Nadson-Andrade Pinho, Luiz-Carlos-Ferreira da Silva
Background: Tooth abnormalities are most often present in individuals with oral clefts than general population, and lead to a long-term impact on facial anatomy and self-esteem. The purpose of this study was to compare the proportion of dental anomalies between the cleft side and non-cleft side in individuals with non-syndromic unilateral alveolar clefts (AC). Material and Methods: Twenty cone beam computed tomography (CBCT) scans were converted into three-dimensional (3D) virtual models...
October 2017: Journal of Clinical and Experimental Dentistry
https://www.readbyqxmd.com/read/29165467/enantiomer-surface-chemistry-conglomerate-versus-racemate-formation-on-surfaces
#5
REVIEW
Soham Dutta, Andrew J Gellman
Research on surface chirality is motivated by the need to develop functional chiral surfaces for enantiospecific applications. While molecular chirality in 3D has been the subject of study for almost two centuries, many aspects of 2D chiral surface chemistry have yet to be addressed. In 3D, racemic mixtures of chiral molecules tend to aggregate into racemate (molecularly heterochiral) crystals much more frequently than conglomerate (molecularly homochiral) crystals. Whether chiral adsorbates on surfaces preferentially aggregate into heterochiral rather than homochiral domains (2D crystals or clusters) is not known...
November 22, 2017: Chemical Society Reviews
https://www.readbyqxmd.com/read/29163345/fluid-distribution-pattern-in-adult-onset-congenital-idiopathic-and-secondary-normal-pressure-hydrocephalus-implications-for-clinical-care
#6
Shigeki Yamada, Masatsune Ishikawa, Kazuo Yamamoto
Objective: In spite of growing evidence of idiopathic normal-pressure hydrocephalus (NPH), a viewpoint about clinical care for idiopathic NPH is still controversial. A continuous divergence of viewpoints might be due to confusing classifications of idiopathic and adult-onset congenital NPH. To elucidate the classification of NPH, we propose that adult-onset congenital NPH should be explicitly distinguished from idiopathic and secondary NPH. Methods: On the basis of conventional CT scan or MRI, idiopathic NPH was defined as narrow sulci at the high convexity in concurrent with enlargement of the ventricles, basal cistern and Sylvian fissure, whereas adult-onset congenital NPH was defined as huge ventricles without high-convexity tightness...
2017: Frontiers in Neurology
https://www.readbyqxmd.com/read/29163118/semi-automated-anatomical-labeling-and-inter-subject-warping-of-high-density-intracranial-recording-electrodes-in-electrocorticography
#7
Liberty S Hamilton, David L Chang, Morgan B Lee, Edward F Chang
In this article, we introduce img_pipe, our open source python package for preprocessing of imaging data for use in intracranial electrocorticography (ECoG) and intracranial stereo-EEG analyses. The process of electrode localization, labeling, and warping for use in ECoG currently varies widely across laboratories, and it is usually performed with custom, lab-specific code. This python package aims to provide a standardized interface for these procedures, as well as code to plot and display results on 3D cortical surface meshes...
2017: Frontiers in Neuroinformatics
https://www.readbyqxmd.com/read/29162299/3d-mno2-hollow-microspheres-ozone-catalysis-coupled-with-flat-plate-membrane-filtration-for-continuous-removal-of-organic-pollutants-efficient-heterogeneous-catalytic-system-and-membrane-fouling-control
#8
Zhuoyan He, Dehua Xia, Yajing Huang, Xiuqin Tan, Chun He, Lingling Hu, Huanjunwa He, Jiawei Zeng, Wenjun Xu, Dong Shu
A heterogeneous catalytic ozonation/membrane filtration (HCOMF) system was fabricated by integrating a flat-plate polyvinylidene fluoride (PVDF) membrane module along with a slurry catalytic ozonation reactor. The performance and catalytic activity of HCOMF was evaluated for degradation of model wastewater containing bisphenol A (BPA) and humid acid (HA) under different permeation flux in long-term continuous experiments. The membrane fouling was investigated by trans-membranous pressure (TMP), membrane filtration resistance, scanning electronic microscopy (SEM), and fluorescence spectra...
November 14, 2017: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/29160929/anatomical-variations-of-the-human-cochlea-determined-from-micro-ct-and-high-resolution-ct-imaging-and-reconstruction
#9
Jie Tang, Xianglong Tang, Zhenhua Li, YiKang Liu, SongHua Tan, Heng Li, RongDan Ke, Zhi Wang, Li Gong, AnZhou Tang
Understanding the anatomical variations in the human cochlea are important for cochlear implants. This study examined these variations using a reconstructed fusion model of the skull and temporal bone. The 3D digital model of the temporal bone was reconstructed from multiple axial micro-CT scans of temporal bone and high resolution CT (HRCT) of the skull from 15 cadavers. A skull model was reconstructed and merged with the reconstructed temporal bone. The 3D relationship between the cochlea and the skull's mid-sagittal plane was analyzed...
November 21, 2017: Anatomical Record: Advances in Integrative Anatomy and Evolutionary Biology
https://www.readbyqxmd.com/read/29160904/three-dimensional-accuracy-of-digital-static-interocclusal-registration-by-three-intraoral-scanner-systems
#10
Kuan Yee Wong, Roxanna Jean Esguerra, Vanessa Ai Ping Chia, Ying Han Tan, Keson Beng Choon Tan
PURPOSE: Prior studies have defined the accuracy of intraoral scanner (IOS) systems but the accuracy of the digital static interocclusal registration function of these systems has not been reported. This study compared the three-dimensional (3D) accuracy of the digital static interocclusal registration of 3 IOS systems using the buccal bite scan function. MATERIALS AND METHODS: Three IOS systems compared were 3M(TM) True Definition Scanner (TDS), TRIOS Color (TRC), and CEREC AC with CEREC Omnicam (CER)...
November 21, 2017: Journal of Prosthodontics: Official Journal of the American College of Prosthodontists
https://www.readbyqxmd.com/read/29160402/effect-of-a-bioactive-glass-ceramic-on-the-control-of-enamel-and-dentin-erosion-lesions
#11
Michelle Alexandra Chinelatti, Camila Tirapelli, Silmara Aparecida Milori Corona, Renato Goulart Jasinevicius, Oscar Peitl, Edgar Dutra Zanotto, Fernanda de Carvalho Panzeri Pires-de-Souza
This study evaluated the effect of a bioactive glass ceramic for the control of erosion and caries lesions. Fragments (n=10) of bovine enamel and root dentin received daily application of different treatments (Biosilicate; Acidulated Phosphate Fluoride- APF; Untreated - control) during the performance of erosive cycles. Surfaces were analyzed with 3D optical profilometry to quantify the superficial loss in four periods (1, 7, 14 and 21 days), as well as the lesion depth with confocal laser scanning microscopy...
July 2017: Brazilian Dental Journal
https://www.readbyqxmd.com/read/29160401/fluoride-varnishes-against-dental-erosion-caused-by-soft-drink-combined-with-pediatric-liquid-medicine
#12
Adílis Kalina Alexandria, Ana Maria Gondim Valença, Lúcio Mendes Cabral, Lucianne Cople Maia
The present study evaluated the effect of NaF and CPP-ACP/NaF varnishes to reduce erosion produced by soft drink (SD) combined or not with pediatric liquid medicine. Enamel specimens were pre-treated with fluoride varnish, according to the following groups: NaF varnish (Duraphat®) or CPP-ACP/NaF varnish (MI varnishTM). Two types of erosive cycles were made: by soft drink erosion (SDE) or by pediatric liquid medicine plus soft drink erosion (PLM/SDE). Bovine enamel specimens were randomly assigned in six groups (n=10): G1=NaF + SDE; G2=CPP-ACP/NaF + SDE; G3=Distilled and deionized (DD) water + SDE; G4=NaF + PLM/SDE; G5=CPP-ACP/NaF + PLM/SDE and G6=DD water + PLM/SDE...
July 2017: Brazilian Dental Journal
https://www.readbyqxmd.com/read/29160397/mechanical-preparation-showed-superior-shaping-ability-than-manual-technique-in-primary-molars-a-micro-computed-tomography-study
#13
Lídia Regina da Costa Hidalgo, Léa Assed Bezerra da Silva, Graziela Bianchi Leoni, Jardel Francisco Mazzi-Chaves, Emily Eduardo da Silva Carvalho, Alberto Consolaro, Manoel Damião Sousa-Neto
The aim of the study was to evaluate canal preparation in primary molars with hand files, ProTaper Next and Self-Adjusting File (SAF) by 2D and 3D micro-computed tomography (micro-CT) analysis. Canals of 24 primary molars were prepared with hand files (HF), ProTaper Next (PTN) and SAF (n=8/group). The teeth were scanned before and after root canal preparation and the pre- and postoperative micro-CT images were reconstructed. Changes in 2D (area, perimeter, roundness, minor and major diameter) and 3D [volume, surface area, structure model index (SMI)] morphological parameters, as well as canal transportation and lateral perforations were evaluated (Kruskal-Wallis and ANOVA; a=0...
July 2017: Brazilian Dental Journal
https://www.readbyqxmd.com/read/29159991/journey-to-the-centre-of-the-cell-virtual-reality-immersion-into-scientific-data
#14
REVIEW
Angus P R Johnston, James Rae, Nicholas Ariotti, Benjamin Bailey, Andrew Lija, Robyn Webb, Charles Ferguson, Sheryl Maher, Thomas P Davis, Richard I Webb, John McGhee, Robert G Parton
Visualization of scientific data is crucial not only for scientific discovery but also to communicate science and medicine to both experts and a general audience. Until recently, we have been limited to visualizing the three-dimensional (3D) world of biology in 2 dimensions. Renderings of 3D cells are still traditionally displayed using two-dimensional (2D) media, such as on a computer screen or paper. However, the advent of consumer grade virtual reality (VR) headsets such as Oculus Rift and HTC Vive means it is now possible to visualize and interact with scientific data in a 3D virtual world...
November 21, 2017: Traffic
https://www.readbyqxmd.com/read/29158962/sediment-tolerance-mechanisms-identified-in-sponges-using-advanced-imaging-techniques
#15
Brian W Strehlow, Mari-Carmen Pineda, Alan Duckworth, Gary A Kendrick, Michael Renton, Muhammad Azmi Abdul Wahab, Nicole S Webster, Peta L Clode
Terrestrial runoff, resuspension events and dredging can affect filter-feeding sponges by elevating the concentration of suspended sediments, reducing light intensity, and smothering sponges with sediments. To investigate how sponges respond to pressures associated with increased sediment loads, the abundant and widely distributed Indo-Pacific species Ianthella basta was exposed to elevated suspended sediment concentrations, sediment deposition, and light attenuation for 48 h (acute exposure) and 4 weeks (chronic exposure)...
2017: PeerJ
https://www.readbyqxmd.com/read/29157956/comparative-analysis-of-fixation-and-embedding-techniques-for-optimized-histological-preparation-of-zebrafish
#16
Jean E Copper, Lynn R Budgeon, Christina A Foutz, Damian B van Rossum, Daniel J Vanselow, Margaret J Hubley, Darin P Clark, David T Mandrell, Keith C Cheng
In recognition of the importance of zebrafish as a model organism for studying human disease, we have created a web-based reference atlas of zebrafish microanatomy for comparing histology and histopathology between model systems and with humans (http://bio-atlas.psu.edu). Fixation, decalcification, embedding, and sectioning were optimized to maximize section quality. A comparison of protocols involving six fixatives showed that 10% Neutral Buffered Formalin at 21°C for 24h yielded excellent results. Sectioning of juveniles and adults requires bone decalcification; EDTA at 0...
November 17, 2017: Comparative Biochemistry and Physiology. Toxicology & Pharmacology: CBP
https://www.readbyqxmd.com/read/29157247/effects-of-implant-length-and-3d-bone-to-implant-contact-on-initial-stabilities-of-dental-implant-a-microcomputed-tomography-study
#17
Jui-Ting Hsu, Aaron Yu-Jen Wu, Lih-Jyh Fuh, Heng-Li Huang
BACKGROUND: The influences of potential bone-to-implant contact (BIC) area (pBICA), BIC area (BICA), and three dimensional (3D) BIC percentage (3D BIC%; defined as BICA divided by pBICA) in relation to the implant length on initial implant stability were studied. Correlations between these parameters were also evaluated. METHODS: Implants with lengths of 8.5, 10, 11.5, and 13 mm were placed in artificial bone specimens to measure three indexes of the initial implant stability: insertion torque value (ITV), Periotest value (PTV), and implant stability quotient (ISQ)...
November 21, 2017: BMC Oral Health
https://www.readbyqxmd.com/read/29156157/continuous-gradient-temperature-raman-spectroscopy-from-100-to-40%C3%A2-c-yields-new-molecular-models-of-arachidonic-acid-and-2-arachidonoyl-1-stearoyl-sn-glycero-3-phosphocholine
#18
C Leigh Broadhurst, Walter F Schmidt, Julie K Nguyen, Jianwei Qin, Kuanglin Chao, Moon S Kim
Despite its biochemical importance, a complete Raman analysis of arachidonic acid (AA, 20:4n-6) has never been reported. Gradient temperature Raman spectroscopy (GTRS) applies the temperature gradients utilized in differential scanning calorimetry (DSC) to Raman spectroscopy, providing a straightforward technique to identify molecular rearrangements that occur near and at phase transitions. Herein we utilize the GTRS technique for AA and 1-18:0, 2-20:4n-6 phosphatidyl choline (AAPC) from cryogenic to mammalian body temperatures...
December 2017: Prostaglandins, Leukotrienes, and Essential Fatty Acids
https://www.readbyqxmd.com/read/29155411/porosity-effect-of-3d-printed-polycaprolactone-membranes-on-calvarial-defect-model-for-guided-bone-regeneration
#19
Jin-Hyung Shim, Jae-Hyang Jeong, Joo-Yun Won, Ji-Hyeon Bae, Geunseon Ahn, Hojun Jeon, Won-Soo Yun, Eun-Bin Bae, Jae-Won Choi, So-Hyoun Lee, Chang-Mo Jeong, Hoyun Chung, Jung-Bo Huh
The appropriate porosity and pore size of barrier membrane were associated with the transportation of biomolecules required for new bone formation and angiogenesis. In this study, we fabricated 3D-printed resorbable polycaprolactone (PCL) membranes with different porosities (30%, 50%, and 70%) to evaluate the effective pore size for guided bone regeneration (GBR) membranes. To analyze mechanical properties and cytocompatibility, PCL membranes prepared using extrusion-based 3D printing technology were compared in dry and wet conditions and tested in vitro...
November 20, 2017: Biomedical Materials
https://www.readbyqxmd.com/read/29154893/an-interleaved-sequence-for-simultaneous-magnetic-resonance-angiography-mra-susceptibility-weighted-imaging-swi-and-quantitative-susceptibility-mapping-qsm
#20
Yongsheng Chen, Saifeng Liu, Sagar Buch, Jiani Hu, Yan Kang, E Mark Haacke
PURPOSE: To image the entire vasculature of the brain with complete suppression of signal from background tissue using a single 3D excitation interleaved rephased/dephased multi-echo gradient echo sequence. This ensures no loss of signal from fast flow and provides co-registered susceptibility weighted images (SWI) and quantitative susceptibility maps (QSM) from the same scan. MATERIALS AND METHODS: The suppression of background tissue was accomplished by subtracting the flow-dephased images from the flow-rephased images with the same echo time of 12...
November 14, 2017: Magnetic Resonance Imaging
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"