keyword
MENU ▼
Read by QxMD icon Read
search

three dimensional

keyword
https://www.readbyqxmd.com/read/28441843/-three-dimensional-printing-technology-in-the-cardiac-field-prospects-and-challenges
#1
X B Pan
No abstract text is available yet for this article.
April 25, 2017: Zhonghua Yi Xue za Zhi [Chinese medical journal]
https://www.readbyqxmd.com/read/28441683/geometric-torsion-in-adolescent-idiopathic-scoliosis-a-new-method-to-differentiate-between-lenke-1-subtypes
#2
Jesse Shen, Samuel Kadoury, Hubert Labelle, Marjolaine Roy-Beaudry, Carl-Éric Aubin, Stefan Parent
STUDY DESIGN: Consecutive case series. OBJECTIVE: To study geometric torsion in thoracic adolescent idiopathic scoliosis (AIS) to propose it as a numerical three-dimensional (3D) parameter that quantifies the scoliosis deformity. SUMMARY OF BACKGROUND DATA: AIS is a 3D deformity of the spine. The most widely accepted and used classification systems, however, still rely on two-dimensional aspects of x-rays. Yet, a 3D classification of AIS remains elusive because there is no widely accepted 3D parameter in the clinical practice...
May 1, 2017: Spine
https://www.readbyqxmd.com/read/28441557/x-ray-micro-computed-tomography
#3
Emily Baird, Gavin Taylor
Emily Baird and Gavin Taylor describe how you can make three-dimensional models of biological samples using x-ray micro-computed tomography.
April 24, 2017: Current Biology: CB
https://www.readbyqxmd.com/read/28441418/relationship-between-acromial-morphological-variation-and-subacromial-impingement-a-three-dimensional-analysis
#4
Xinyu Li, Wei Xu, Ning Hu, Xi Liang, Wei Huang, Dianming Jiang, Hong Chen
PURPOSE: To evaluate the association of acromial morphology and subacromial impingement. METHODS: Bilateral shoulder computed tomography was performed in 138 patients who received shoulder arthroscopy. Measured parameters included: acromial tilt (AT), modified acromial tilt (mAT), acromial slope (AS), acromiohumeral interval (AHI), lateral acromial angle (LAA), acromial index (AI), critical shoulder angle (CSA), acromial anterior protrusion (AAP), and acromial inferior protrusion (AIP)...
2017: PloS One
https://www.readbyqxmd.com/read/28441334/peptidyl-transferase-center-and-the-emergence-of-the-translation-system
#5
Savio Torres de Farias, Thais Gaudêncio Rêgo, Marco V José
In this work, the three-dimensional (3D) structure of the ancestral Peptidyl Transferase Center (PTC) built by concatamers of ancestral sequences of tRNAs was reconstructed, and its possible interactions with tRNAs molecules were analyzed. The 3D structure of the ancestral PTC was also compared with the current PTC of T. thermophilus. Docking experiments between the ancestral PTC and tRNAs suggest that in the origin of the translation system, the PTC functioned as an adhesion center for tRNA molecules. The approximation of tRNAs charged with amino acids to the PTC permitted peptide synthesis without the need of a genetic code...
April 25, 2017: Life
https://www.readbyqxmd.com/read/28441229/preliminary-model-for-the-design-of-a-custom-middle-ear-prosthesis
#6
Brandon Kamrava, Jonathan A Gerstenhaber, Mamta Amin, Yah-El Har-El, Pamela C Roehm
HYPOTHESIS: Custom prostheses could be used to recreate the ossicular chain and improve hearing. BACKGROUND: Ossicular discontinuity or fixation occurs in 55% of cases of conductive hearing loss, with most cases involving the incus. Reconstruction has been achieved by a variety of methods; however, there has been little improvement in hearing outcomes in decades. METHODS: Precise measurements of anatomic dimensions, weight, and center of gravity were taken from 19 cadaveric incudes...
April 24, 2017: Otology & Neurotology
https://www.readbyqxmd.com/read/28441058/protein-misfolding-diseases
#7
F Ulrich Hartl
The majority of protein molecules must fold into defined three-dimensional structures to acquire functional activity. However, protein chains can adopt a multitude of conformational states, and their biologically active conformation is often only marginally stable. Metastable proteins tend to populate misfolded species that are prone to forming toxic aggregates, including soluble oligomers and fibrillar amyloid deposits, which are linked with neurodegeneration in Alzheimer and Parkinson disease, and many other pathologies...
April 24, 2017: Annual Review of Biochemistry
https://www.readbyqxmd.com/read/28441033/surface-enhanced-raman-scattering-sers-active-gold-nanoparticles-decorated-on-a-porous-polymer-filter
#8
Lei Chen, Huiying Yan, Xiangxin Xue, Dayu Jiang, Yuxi Cai, Dongmei Liang, Young Mee Jung, Xiao Xia Han, Bing Zhao
In this work, we designed a process to assemble gold nanoparticles onto a three-dimensional (3D) polymer surface, which can then be monitored using surface-enhanced Raman scattering (SERS). This work is the first demonstration of the assembly of gold nanoparticles on a filter film and in situ measurement with Raman spectroscopy. Herein, a polyhexamethylene adipamide (Nylon66) film embedded in the organic filter film was used as a template to fabricate a tunable SERS-active substrate. A "hotspot"-rich gold-nanoparticle-decorated polymer substrate for SERS was prepared; this substrate exhibited high sensitivity in trace detection of targets...
January 1, 2017: Applied Spectroscopy
https://www.readbyqxmd.com/read/28440669/can-multiphase-dynamic-ct-angiography-provide-a-better-assessment-of-aortic-dissection-compared-with-the-standard-triphasic-protocol
#9
Chun-Yan Lu, Yi-Ke Diao, Ying-Qiang Guo, Xiao-Hui Zhang, Hong-Li Bai, Zhen-Lin Li
Background Acute aortic dissection (AD) is a life-threatening medical emergency. It has been debated whether the multiphase dynamic computed tomography angiography (CTA) protocol is superior to the standard triphasic protocol for revealing the characteristics of AD. Purpose To examine two multiphase dynamic protocols, Dynamic four-dimensional (4D) CTA using the shuttle mode and Flash 4D CTA using the high-pitch mode for the assessment of AD and to compare them with the standard triphasic protocol. Material and Methods A total of 54 consecutive patients were randomly and equally assigned to three groups and scanned with a second-generation DSCT scanner...
January 1, 2017: Acta Radiologica
https://www.readbyqxmd.com/read/28440633/syntheses-structures-and-characterization-of-quaternary-tellurites-li3mte4o11-m-al-ga-and-fe
#10
Minfeng Lü, Hongil Jo, Seung-Jin Oh, Suheon Lee, Kwang-Yong Choi, Yang Yu, Kang Min Ok
Three new quaternary lithium metal tellurites, Li3MTe4O11 (M = Al, Ga, and Fe), have been synthesized through hydrothermal and solid-state reactions by heating a mixture of LiOH·H2O, TeO2, and M2O3. The structures of the title compounds have been determined by single-crystal and powder X-ray diffraction. Li3MTe4O11 reveal three-dimensional (3D) frameworks that consist of MO6 octahedra, TeO3 trigonal pyramids, and TeO4 polyhedra. The variable coordination mode of Te(4+) within the framework leads to the formation of 1D channels that host Li(+) cations on both tetrahedral and octahedral sites...
April 25, 2017: Inorganic Chemistry
https://www.readbyqxmd.com/read/28440619/collagen-membranes-with-ribonuclease-inhibitors-for-long-term-stability-of-electrochemical-aptamer-based-sensors-employing-rna
#11
Mirelis Santos-Cancel, Ryan J White
Electrochemical aptamer-based (E-AB) sensors offer advantageous analytical detection abilities on account of their rapid response time (sec to min), specificity to a target, and selectivity to function in complex media. Ribonucleic acid (RNA) aptamers employed in this class of sensor offer favorable binding characteristics resulting from the ability of RNA to form stable tertiary folds aided by long-range intermolecular interactions. As a result, RNA aptamers can fold into more complex three-dimensional structures than their DNA counterparts, and consequently, exhibit better binding ability to target analytes...
April 25, 2017: Analytical Chemistry
https://www.readbyqxmd.com/read/28440382/ph-dependent-structural-diversity-of-a-2-pyridinemethanol-cu-complex-and-its-relatively-strong-magnetic-exchange-coupling-via-hydrogen-bonding
#12
Tomohiko Hamaguchi, Tomoko Nagata, Shinya Hayami, Satoshi Kawata, Isao Ando
The diversity of the self-assembled structures of a Cu complex via hydrogen bonding, including a square planar unit, is reported. The Cu complex forms two self-assembled structures by hydrogen bonding, depending on the acidity of the recrystallization conditions. A linear chain structure can be produced under acidic conditions, and a three-dimensional network structure is observed under basic conditions. The linear chain structure is constructed from intermolecular sharing of a hydrogen atom between two 2-pyridinemethanolate units, with an OO distance of 2...
April 25, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/28440357/virtual-hysteroscopy-a-new-non-invasive-approach-for-the-assessment-of-uterine-cavity
#13
Paulo Sergio Cossi, Heron Werner, Alberto Borges Peixoto, Wellington P Martins, Edward Araujo Júnior
Endometrial pathology is frequent in premenopausal women and the diagnostic hysteroscopy is considered the gold standard for assessing endometrial cavity and congenital uterine anomalies. However it is an invasive and uncomfortable procedure. Saline contrast hysterosalgingography and hysterosalpingo-contrast sonography allow detailed assessment of the uterine cavity. We propose a virtual hysteroscopy from three-dimensional saline and three-dimensional hysterosalpingo-contrast sonography scan data to generate a virtual reality as a new noninvasive procedure for assessing the uterine cavity in uterine congenital anomaly and endometrial pathology cases as well...
April 22, 2017: Medical Ultrasonography
https://www.readbyqxmd.com/read/28440281/short-channel-effects-on-electrokinetic-energy-conversion-in-solid-state-nanopores
#14
Yan Zhang, Yuhui He, Makusu Tsutsui, Xiang Shui Miao, Masateru Taniguchi
The ion selectivity of nanopores due to the wall surface charges is capable of inducing strong coupling between fluidic and ionic motion within the system. This interaction opens up the prospect of operating nanopores as nanoscale devices for electrokinetic energy conversion. However, the very short channel lengths make the ionic movement and fluidics inside the pore to be substantially affected by the ion depletion/accumulation around the pore ends. Based on three-dimensional electrokinetic modeling and simulation, we present a systematic theoretical study of nanopore electrical resistance, fluidic impedance, and streaming conductance...
April 25, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28439920/understanding-human-thiol-dioxygenase-enzymes-structure-to-function-and-biology-to-pathology
#15
REVIEW
Bibekananda Sarkar, Mahesh Kulharia, Anil K Mantha
Amino acid metabolism is a significant metabolic activity in humans, especially of sulphur-containing amino acids, methionine and cysteine (Cys). Cys is cytotoxic and neurotoxic in nature; hence, mammalian cells maintain a constant intracellular level of Cys. Metabolism of Cys is mainly regulated by two thiol dioxygenases: cysteine dioxygenase (CDO) and 2-aminoethanethiol dioxygenase (ADO). CDO and ADO are the only human thiol dioxygenases reported with a role in Cys metabolism and localized to mitochondria...
April 24, 2017: International Journal of Experimental Pathology
https://www.readbyqxmd.com/read/28439560/direct-4d-printing-via-active-composite-materials
#16
Zhen Ding, Chao Yuan, Xirui Peng, Tiejun Wang, H Jerry Qi, Martin L Dunn
We describe an approach to print composite polymers in high-resolution three-dimensional (3D) architectures that can be rapidly transformed to a new permanent configuration directly by heating. The permanent shape of a component results from the programmed time evolution of the printed shape upon heating via the design of the architecture and process parameters of a composite consisting of a glassy shape memory polymer and an elastomer that is programmed with a built-in compressive strain during photopolymerization...
April 2017: Science Advances
https://www.readbyqxmd.com/read/28439524/brainsegnet-a-convolutional-neural-network-architecture-for-automated-segmentation-of-human-brain-structures
#17
Raghav Mehta, Aabhas Majumdar, Jayanthi Sivaswamy
Automated segmentation of cortical and noncortical human brain structures has been hitherto approached using nonrigid registration followed by label fusion. We propose an alternative approach for this using a convolutional neural network (CNN) which classifies a voxel into one of many structures. Four different kinds of two-dimensional and three-dimensional intensity patches are extracted for each voxel, providing local and global (context) information to the CNN. The proposed approach is evaluated on five different publicly available datasets which differ in the number of labels per volume...
April 2017: Journal of Medical Imaging
https://www.readbyqxmd.com/read/28439322/susceptibility-imaging-in-glial-tumor-grading-using-3-tesla-magnetic-resonance-mr-system-and-32-channel-head-coil
#18
Omer Aydin, Ramazan Buyukkaya, Bahattin Hakyemez
BACKGROUND: Susceptibility weighted imaging (SWI) is a velocity compensated, high-resolution three-dimensional (3D) spoiled gradient-echo sequence that uses magnitude and filtered-phase data. SWI seems to be a valuable tool for non-invasive evaluation of central nervous system gliomas. Relative cerebral blood volume (rCBV) ratio is one of the best noninvasive methods for glioma grading. Degree of intratumoral susceptibility signal (ITSS) on SWI correlates with rCBV ratio and histopathological grade...
2017: Polish Journal of Radiology
https://www.readbyqxmd.com/read/28439161/three-dimensional-analysis-of-the-anatomical-characteristics-and-dimensions-of-the-nasopalatine-canal-using-cone-beam-computed-tomography
#19
Nikhil V Jain, Affaf A Gharatkar, Bandish A Parekh, Smita I Musani, Umang Deepak Shah
AIM: Placement of implants in the maxillary anterior region needs to be preceded by careful analysis of the area as in addition to the functional aspect the esthetic outcome is of prime importance. This descriptive study evaluated anatomical characteristics and dimensions of the nasopalatine canal (NC) from coronal, sagittal and axial aspects using cone beam computed tomography (CBCT) giving it a three dimensional analytical approach. Also the dimensions of the corresponding buccal bone plate (BBP) of the alveolar process were evaluated...
June 2017: Journal of Maxillofacial and Oral Surgery
https://www.readbyqxmd.com/read/28439102/mecp2-regulated-mirnas-control-early-human-neurogenesis-through-differential-effects-on-erk-and-akt-signaling
#20
N Mellios, D A Feldman, S D Sheridan, J P K Ip, S Kwok, S K Amoah, B Rosen, B A Rodriguez, B Crawford, R Swaminathan, S Chou, Y Li, M Ziats, C Ernst, R Jaenisch, S J Haggarty, M Sur
Rett syndrome (RTT) is an X-linked, neurodevelopmental disorder caused primarily by mutations in the methyl-CpG-binding protein 2 (MECP2) gene, which encodes a multifunctional epigenetic regulator with known links to a wide spectrum of neuropsychiatric disorders. Although postnatal functions of MeCP2 have been thoroughly investigated, its role in prenatal brain development remains poorly understood. Given the well-established importance of microRNAs (miRNAs) in neurogenesis, we employed isogenic human RTT patient-derived induced pluripotent stem cell (iPSC) and MeCP2 short hairpin RNA knockdown approaches to identify novel MeCP2-regulated miRNAs enriched during early human neuronal development...
April 25, 2017: Molecular Psychiatry
keyword
keyword
36333
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"