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Rozprawy doktorskie na temat „Micro-CT”

Autor: Grafiati

Data publikacji: 4 czerwca 2021

Data aktualizacji: 25 lipca 2025

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1

Gao, Bo. "Multigrid reconstruction of micro-CT data." Thesis, KTH, Skolan för teknik och hälsa (STH), 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-211180.

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The group of Medical Imaging at School of Health and Technology is developing a micro-CT scanner for small animal imaging. Micro-CT refers to reconstructing CT image with resolution in scale of micrometer, and this goal is achieved by acquiring projection data with high resolution. Nevertheless, high resolution projection data and high resolution recon- struction image have introduced the problem of memory insufficiency, as more points need to be processed during micro-CT reconstruction. For this reason, this paper has investigated how to alleviate the burden on computers memory through applyi

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Sen, Sharma Kriti. "Compressed Sensing based Micro-CT Methods and Applications." Diss., Virginia Tech, 2013. http://hdl.handle.net/10919/52866.

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High-resolution micro computed tomography (micro-CT) offers 3D image resolution of 1 um for non-destructive evaluation of various samples. However, the micro-CT performance is limited by several factors. Primarily, scan time is extremely long, and sample dimension is restricted by the x-ray beam and the detector size. The latter is the cause for the well-known interior problem. Recent advancement in image reconstruction, spurred by the advent of compressed sensing (CS) theory in 2006 and interior tomography theory since 2007, offers great reduction in the number of views and an increment in th

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Sharma, Yash. "Automated fibre segmentation in micro CT images of paper." Thesis, University of British Columbia, 2014. http://hdl.handle.net/2429/50044.

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Characterizing the structure of paper products made from Northern Bleached Softwood Kraft (NBSK) pulp after Low Consistency refining is a vital step to understanding the strengthening mechanisms of NBSK fibres as well as the effect of refining on the fibre morphology. X-ray micro tomographic (µCT) imaging coupled with advanced image analysis enables the characterization of the internal structure of paper at a very high resolution in 3D. In this work, a novel algorithm has been developed to isolate individual papermaking fibres in µCT images of paper handsheets as a first step to characterize

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Zainon, Rafidah Binti. "Spectral Micro-CT Imaging of Ex Vivo Atherosclerotic Plaque." Thesis, University of Canterbury. Physics and Astronomy, 2012. http://hdl.handle.net/10092/7165.

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The goal of this research was to demonstrate the potential of spectral CT for the discrimination of vulnerable atherosclerotic plaques. It was proposed that spectral CT has the potential to identify the presence of specific markers for vulnerable plaques: iron deposits and lipid core. A spectral micro-CT system incorporating the latest Medipix spectroscopic photon- counting detectors was commissioned for this purpose. Using spectroscopic methods developed with this system, it was possible to distinguish the presence of iron deposits and lipid core within ex vivo atherosclerotic plaques. Athero

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Gomes, Mauricio Neves. "Desproteinização do esmalte associada à técnica de remineralização no clareamento em consultório." Universidade de São Paulo, 2011. http://www.teses.usp.br/teses/disponiveis/23/23140/tde-30112011-164218/.

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Objetivo: avaliar cor, brilho, rugosidade e alterações ultraestruturais do esmalte dental clareado com peróxido de hidrogênio a 35 %, submetido ao tratamento prévio com agente desproteinizante, ou ao tratamento posterior com o agente remineralizador fosforopeptídeo de caseína/fosfato de cálcio amorfo (ACP-CPP). Material e Métodos: Os grupos experimentais foram: GC (controle/consultório): H2O2 a 35 % - 4 sessões de 8 min; GE1 (primer+consultório): NaOCl 5,25 % por 1 min, aplicação do H2O2 a 35 % como no GC; e GE2 (consultório+ACP): GC + ACP-CPP diariamente por 7 dias. Fragmentos contendo esmalt

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Opie, Alexander M. T. "Contributions to spectral CT." Thesis, University of Canterbury. Electrical and Computer Engineering, 2013. http://hdl.handle.net/10092/8532.

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Spectral x-ray computed tomography (CT) is an important nascent imaging modality with several exciting potential applications. The research presented in this thesis separates into two primary areas with the common underlying theme of spectral CT; the first area is Compton scatter estimation and the second is interior tomography. First, the research is framed and outputs are identified. Background on the concepts used in the thesis is offered, including x-ray imaging and computed tomography, CT scanner architecture, spectral imaging, interior tomography and x-ray scatter. The mathematical back

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Iglecias, Elaine Faga. "Avaliação qualitativa e quantitativa da instrumentação e obturação de canais radiculares achatados utilizando-se microtomografia computadorizada." Universidade de São Paulo, 2014. http://www.teses.usp.br/teses/disponiveis/23/23145/tde-19022015-172359/.

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Na Endodontia, a microtomografia (CT) tem sido amplamente utilizada como método de análise tridimensional. Atualmente, três movimentos mecanizados para o preparo do canal radicular tem sido introduzidos na rotina endodôntica, oscilatório, rotatório e recíproco. Existem diferentes sistemas de limas acionadas por motores capazes de realizar esses movimentos. Sendo assim, os objetivos deste trabalho são utilizar a CT para avaliar, em canais mesiais achatados de molares inferiores, a qualidade e modelagem final de preparo do canal radicular, utilizando-se sistemas oscilatório, recíproco e rotatóri

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8

Robertson, Galen Charles. "Quantification of Skeletal Phenotype Using Micro-CT and Mechanical Testing." Thesis, Georgia Institute of Technology, 2004. http://hdl.handle.net/1853/4874.

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With the vast array of genetically altered (knockout) mice becoming available there is a need for quantitative, repeatable, and efficient methodologies to characterize the phenotypic consequences of knocking out specific genes. Since knockout animals often have the ability to compensate for a single missing gene, it is important to examine the structural, material and morphological properties to obtain a thorough understanding of the changes occurring. For this project, femurs of knockout mice were first scanned using microcomputed tomography (micro-CT) to obtain high-resolution images of th

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9

Cahoon, Lindsey Charlene. "Micro-CT Inspection of Impact Damage in Carbon/Epoxy Rods." BYU ScholarsArchive, 2016. https://scholarsarchive.byu.edu/etd/6350.

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Various configurations of unidirectional carbon/epoxy composite rods were impacted radially, inspected using micro-CT scanning equipment, and tested in axial compression to measure the residual strength after impact. This data was used to correlate the relationship between impact energy, residual strength, and the peak crack area and total crack volume along the length of the specimens. These specimens represent local members of open three-dimensional composite lattice structures (e.g., based on isogrid or IsoTruss® geometries) that are continuously fabricated using advanced three-dimensional

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10

SERRA, FRANCESCA GIULIA. "Bone-like inducing grafts: in vivo and micro-CT analysis." Doctoral thesis, Politecnico di Torino, 2020. http://hdl.handle.net/11583/2858349.

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taha, Nada. "3D RECONSTRUCTION OF MICRO CT IMAGES FOR SINGLE PHOTON PROCESSING SYSTEM." Thesis, Mittuniversitetet, Institutionen för informationsteknologi och medier, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:miun:diva-20028.

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David, Alfaro. "Micro-CT measurement of the internal fit of lithium disilicate crowns." Thesis, University of British Columbia, 2013. http://hdl.handle.net/2429/44929.

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The introduction of digital impressions into the field of dentistry has begun the era of entirely computer assisted crown fabrication. The aim of this study was to assess the internal fit of lithium disilicate crowns fabricated using this novel impression technology and to compare their fit to the fit of crowns obtained by traditional elastomeric impressions. Thus, 15 lithium disilicate crowns were fabricated using an entirely digital workflow (impression and fabrication), 15 lithium disilicate crowns were fabricated manually from digital impressions, and 15 lithium disilicate crowns were fab

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13

Qaseminejad, Raeini Ali. "Modelling multiphase flow through micro-CT images of the pore space." Thesis, Imperial College London, 2013. http://hdl.handle.net/10044/1/11617.

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We present a numerical method for modelling two-phase flow through porous media directly at the pore scale. The volume of fluid method is used to capture the interface motion. The volume of fluid equation and the incompressible Navier-Stokes equations are discretised by the finite volume method using a single fluid methodology, with a discontinuity in the phase properties. Capillary forces are calculated using a new semi-sharp formulation and filtered, to allow for simulations at low capillary numbers and avoid non-physical velocities. They are applied into the Navier-Stokes equations using a

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14

Britton, Steven Todd. "AN ANALYSIS OF INTERNAL VOIDS OF ORTHODONTIC ADHESIVES VIA MICRO-CT." Master's thesis, Temple University Libraries, 2019. http://cdm16002.contentdm.oclc.org/cdm/ref/collection/p245801coll10/id/598784.

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Oral Biology<br>M.S.<br>Objectives: While bracket debonding has been explored through shear bond-strength tests with debonding linked to the type of material used, the technique of adhesive application, and contamination, the contribution of internal voids in orthodontic adhesives is unknown. Voids may result in fracture or bond-failure, either within the adhesive or at the tooth-adhesive-bracket interfaces. The aim of this thesis is to quantify the internal volumetric voids and bonding strength of three generations of bracket adhesives. Methods: Extracted third molars were bonded with three g

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15

Liu, Fanxiao [Verfasser], and Peter [Akademischer Betreuer] Müller. "Micro-CT and Micro-FE analysis of stress transfer of femoral stems / Fanxiao Liu ; Betreuer: Peter Müller." München : Universitätsbibliothek der Ludwig-Maximilians-Universität, 2021. http://d-nb.info/1228270732/34.

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16

Bennett, James. "Hybrid Spectral Micro-CT: System Implementation, Exposure Reduction, K-edge Imaging Optimization, and Content Management." Diss., Virginia Tech, 2014. http://hdl.handle.net/10919/25525.

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Spectral computed tomography (CT) has proven an important development in biomedical imaging, yet there are several limitations to this nascent technology. Near-term implementation of spectral CT imaging can be enhanced using a hybrid architecture that integrates a narrow-beam spectral 'interior' imaging chain integrated with a traditional wide-beam 'global' imaging chain. The first study demonstrates the feasibility of hybrid spectral micro-CT architecture with a first-of-its-kind system implementation and preliminary results showing improved contrast resolution and spatial resolution. The

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17

Michelon, Carina. "EFICÁCIA DA ATIVAÇÃO ULTRASSÔNICA PASSIVA DO SOLVENTE NA REMOÇÃO DE MATERIAL OBTURADOR DURANTE O RETRATAMENTO ENDODÔNTICO ANÁLISE POR MICROTOMOGRAFIA COMPUTADORIZADA." Universidade Federal de Santa Maria, 2013. http://repositorio.ufsm.br/handle/1/6106.

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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior<br>The removal of pre-existing root canal filling is basic requirement for endodontic retreatment in order to reveal necrotic tissue debris and bacteria which may be responsible for periapical inflammation and by the treatment failure. The aim of this study was to evaluate the efficacy of passive ultrasonic activation (PUA) with use of organic solvent as an assistant method in removal of filling material during endodontic retreatment and determine a protocol for its utilization, using high-resolution micro-Computed Tomography (micro-C

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18

Pichotka, Martin Peter [Verfasser], and Caroline [Akademischer Betreuer] Röhr. "Iterative CBCT reconstruction-algorithms for a spectroscopic Medipix-Micro-CT = Iterative CBCT Rekonstruktions-Algorithmen für ein spektroskopisches Medipix-Mikro-CT." Freiburg : Universität, 2014. http://d-nb.info/1115495674/34.

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Stjärnesund, Johan. "A micro-CT investigation of density changes in pressboard due to compression." Thesis, Uppsala universitet, Tillämpad mekanik, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-350876.

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Pressboard, a high-density cellulose-based product, is used both as load bearing structures and dielectric insulation in oil-filled power transformers. During transformer operation, mechanical forces and vibrations are applied on the material. In particular, this investigation focuses on pressboard sheets placed between the turns of transformer windings, called the spacers, which during short circuit are subjected to high compressive forces of impulse nature. As a result of these forces, remaining deformations are created in the components. One step to reduce the negative consequences that com

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20

Kabini, S. N. "An in-vitro comparative micro-computed tomographic evaluation of three obturation systems." University of the Western Cape, 2017. http://hdl.handle.net/11394/6312.

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Magister Chirurgiae Dentium - MChD (Prosthodontics)<br>Gaps or voids between walls of root canal and obturation material may lead to re-infection of the obturated root canal. Therefore, adaptation of the obturation material to dentine walls is essential for the success of root canal treatment.

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Sório, Ana Luisa Riul. "Avaliação histológica e microtomográfica do efeito de células osteoblásticas originárias da medula óssea em defeitos ósseos na calvária de ratos submetidos a um modelo experimental de osteorradionecrose." Universidade de São Paulo, 2017. http://www.teses.usp.br/teses/disponiveis/58/58138/tde-30082017-090138/.

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A osteorradionecrose é uma séria e debilitante consequência da radioterapia da cabeça e pescoço, definida como uma área óssea que não sofre reparação após a irradiação. O objetivo deste trabalho foi analisar o efeito in vivo da presença de células mesenquimais da medula óssea carreadas em gel em defeitos provocados na calvária de ratos submetidos a um modelo experimental de osteorradionecrose. Foi realizada a obtenção de células osteoblásticas da medula óssea de ratos cultivadas in vitro e devidamente caracterizadas quanto ao seu fenótipo por meio de ensaios bioquímicos como proliferação celul

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Al, Jamaan Tamer Saleh. "Diagnostic accuracy and reproducibility of conventional and novel caries detection methods as determined by histology and micro-CT : a study in vitro." Thesis, University of Dundee, 2016. https://discovery.dundee.ac.uk/en/studentTheses/8aee92e0-8af5-4815-b67b-96de1088e07d.

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Taylor, Howard. "Assessing the potential for suffusion in sands using X-ray micro-CT images." Thesis, Imperial College London, 2016. http://hdl.handle.net/10044/1/56070.

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Internal erosion is a major safety concern for embankment dams and flood embankments and is the focus of much research internationally. Suffusion is a mechanism of internal erosion which affects gap-graded or broadly graded cohesionless soils and is characterised by selective removal of fine material, leaving behind a coarse material with increased hydraulic conductivity. Early studies on suffusion proposed design criteria based on laboratory testing, and presented conceptual models to explain the results in terms of grain-scale behaviour. The study by Kenney & Lau (1985) identified three crit

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24

Kim, Paul [Verfasser]. "In-vitro-Untersuchung des Pulpenraums mandibulärer primärer Prämolaren im Micro-CT / Paul Kim." Mainz : Universitätsbibliothek der Johannes Gutenberg-Universität Mainz, 2020. http://d-nb.info/1224810201/34.

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McMurray, Alexis Kelly. "Micro-CT/PET Assessment of Lung Metastasis in a Mouse Model of Osteosarcoma." The Ohio State University, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=osu1364308724.

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Starnoni, Michele. "Modelling single and two-phase flow on micro-CT images of rock samples." Thesis, University of Aberdeen, 2017. http://digitool.abdn.ac.uk:80/webclient/DeliveryManager?pid=232293.

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In this Thesis, numerical simulations of single and two-phase pore-scale flow on three dimensional images obtained from micro-CT scanning of different reservoir rocks are presented. For single-phase flow, the petrophysical properties of rocks, namely Representative Elementary Volume (REV), mean pore and grain size, and absolute permeability, are calculated using an integrated approach comprising image processing, statistical correlation and numerical simulations. Two rock formations, one carbonate and one sandstone, are used throughout this Thesis. It is shown that REV and mean pore and grain

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Hopper, Timothy Andrew John. "Quantitative MRI and Micro-CT of bone architecture : applications and limitations in orthopaedics." Thesis, Queensland University of Technology, 2005. https://eprints.qut.edu.au/16149/1/Timothy_Hopper_Thesis.pdf.

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The aim of this thesis was to investigate some methods for quantitative analysis of bone structure, particularly techniques which might ultimately be applied post-operatively following orthopaedic reconstruction operations. Initially it was decided to explore the efficacy of MRI in quantifying the bone structure at high resolution by comparing high resolution MRI against 'gold standards' such as Scanning Electron Microscopy (SEM) and optical histology. This basic study provided a measure of the distortions in the morphological bone parameters derived from MR images due to susceptibility ar

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Hopper, Timothy Andrew John. "Quantitative MRI and Micro-CT of Bone Architecture: Applications and Limitations in Orthopaedics." Queensland University of Technology, 2005. http://eprints.qut.edu.au/16149/.

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The aim of this thesis was to investigate some methods for quantitative analysis of bone structure, particularly techniques which might ultimately be applied post-operatively following orthopaedic reconstruction operations. Initially it was decided to explore the efficacy of MRI in quantifying the bone structure at high resolution by comparing high resolution MRI against 'gold standards' such as Scanning Electron Microscopy (SEM) and optical histology. This basic study provided a measure of the distortions in the morphological bone parameters derived from MR images due to susceptibility artefa

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Pan, Lei. "The earliest members of the genus Homo in South Africa : evidence from inner structure of lower postcanine dentition." Thesis, Toulouse 3, 2016. http://www.theses.fr/2016TOU30087/document.

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Cette thèse se compose de deux projets individuels et six chapitres, qui sont basées sur l'examen de la structure interne dentaire inférieure dentition postcanine dans un certain nombre de fossiles et modernes spécimens, à travers lesquels une étude approfondie a été effectuée à l'aide de micro-tomodensitométrie et ordinateur-outils de paleonanthropology assistée. Nous avons d'abord recensé et évalué la valeur taxinomique de l'épaisseur de l'émail et des modèles de distribution de l'épaisseur de l'émail 3D entier couronne dans un certain nombre des premiers membres du genre Homo en Afrique du

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Inness, Philip Ralph Patton. "Assessment of different contrast preparations for micro-computed tomographic microangiographic assessment of canine cadaveric hindlimbs." Thesis, The University of Sydney, 2021. https://hdl.handle.net/2123/27503.

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Reliable microvascular identification and quantitative vascular assessment via Micro-CT collection of intraosseous measurements has not been reported in dogs. The aim of this study was to identify the ideal preparation (Criteria: perfusability, radiodensity and homogeneity) for quantitative assessment of canine intraosseous microvasculature. Materials/Methods: Cadaveric specimens were perfused initially with resin preparations [Resin Study: Barium+Resin (BS+R), Barium, Acetone+Resin (BSA+R), Barium Slurry+Resin (BSS+R), and Barium Slurry, Acetone+Resin (BSSA+R)]. BSS+R was then compared wi

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Cheng, Linda Lam. "Repair of root resorption four and eight weeks following the application of continuous light and heavy forces for four weeks: micro-ct and histology studies." Thesis, Faculty of Dentistry, 2007. http://hdl.handle.net/2123/4308.

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Ballard, Darin J. "Properties of root cementum: part 11 continuous versus intermittent controlled orthodontic forces on root resorption. a micro-ct study." Thesis, Faculty of Dentistry, 2006. http://hdl.handle.net/2123/4307.

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May, Catherine M. "Craniofacial Bone Density is Regulated by Thyroid Hormone in Zebrafish:." Thesis, Boston College, 2019. http://hdl.handle.net/2345/bc-ir:108815.

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Thesis advisor: Sarah McMenamin<br>Thyroid hormone (TH) facilitates developmental transitions, particularly by modulating cell proliferation and differentiation. Its role in regulating skeletal growth is well documented. Previous work from our lab and others have demonstrated that hypo- and hyperthyroid fish display changes in bone shape, ossification and the timing of ossification5. Zebrafish (Danio rerio) develop bone quickly, grow indefinitely throughout their lives, are highly amenable for imaging, and are a valuable model for skeletal biology research. Using Danio rerio, we sought to stud

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He, Bihui. "Functional role of CKIP-1 for bone formation reduction during aging: micro CT analysis." HKBU Institutional Repository, 2015. https://repository.hkbu.edu.hk/etd_oa/141.

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Background: Bone metabolism is a dynamic balance, consisting two major courses: bone resorption and bone formation. Bone loss during aging is an age-associated process. There are several aspects changing with age in bone, including bone mechanical behavior, bone mineral matrix, bone proteins, genetic and molecular signaling in bone cells physiology. Based on the above factors, when the formation decreases, it leads to a disorder disease: osteoporosis, characterized by low bone mineral density and degenerating microstructure, resulting in increased risks of bone fractures. Many previous studies

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Epshteyn, Leonid. "OPTIMAL SPECIFICATIONS FOR MEASURING BONE-TO-IMPLANT CONTACT OF MINI-SCREWS USING MICRO-CT." Master's thesis, Temple University Libraries, 2016. http://cdm16002.contentdm.oclc.org/cdm/ref/collection/p245801coll10/id/395373.

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Oral Biology<br>M.S.<br>The use of mini-screws (MSs) as temporary anchorage devices (TADs) is becoming more common in orthodontic treatment. With the increased use of TADs and the numerous manufactures producing them, research is needed to aid orthodontists in their selection of MSs. One of the major advantages of using mini-screw implants is that they can be loaded immediately and do not require osseoitegration.1 For this to be successful, the mini-screw needs to have adequate primary stability to retain itself in the bone. The mini-screw bone system relies on the stability of the mini-screw,

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Mohapatra, Sucheta. "Development and quantitative assessment of a beam hardening correction model for preclinical micro-CT." Thesis, University of Iowa, 2012. https://ir.uiowa.edu/etd/3500.

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The phenomenon of x-ray beam hardening (BH) has significant impact on preclinical micro-CT imaging systems. The causal factors are the polyenergetic nature of x-ray beam used for imaging and the energy dependence of linear attenuation coefficient of the imaged material. With increase in length of propagation of beam in the imaged object, lower energy photons in the projected beam become preferentially absorbed. The beam "hardens" (as average energy increases) and progressively becomes more penetrating, causing underestimation of the attenuation coefficient. When this phenomenon is not accounte

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Iori, Gianluca. "Micro-FEM models based on micro-CT reconstructions for the in vitro characterization of the elastic properties of trabecular bone tissue." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2013. http://amslaurea.unibo.it/5422/.

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This master’s thesis describes the research done at the Medical Technology Laboratory (LTM) of the Rizzoli Orthopedic Institute (IOR, Bologna, Italy), which focused on the characterization of the elastic properties of the trabecular bone tissue, starting from october 2012 to present. The approach uses computed microtomography to characterize the architecture of trabecular bone specimens. With the information obtained from the scanner, specimen-specific models of trabecular bone are generated for the solution with the Finite Element Method (FEM). Along with the FEM modelling, mechanical test

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Klinge, Christine [Verfasser]. "Quantitative Strukturanalyse der Mäuselunge mit stereologischen Methoden: Korrelation von Micro-CT und Histologie / Christine Klinge." Hannover : Bibliothek der Tierärztlichen Hochschule Hannover, 2013. http://d-nb.info/1037834569/34.

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Terrin, Massimo. "Micro-CT for small animal imaging : Optimization of the tube voltage for low-contrast imaging." Thesis, KTH, Skolan för teknik och hälsa (STH), 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-176482.

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This master thesis evaluated the optimal tube voltage for low-contrast imaging of a micro-CT system (intended for small animal imaging) built at the School of Technology and Health (STH) of the Royal Institute of Technology (KTH). The main goal of this work was to calibrate the above-mentioned device (composed moreover by a Hamamatsu microfocus L10951-01 X-ray tube, a CMOS flat panel Hamamatsu C7942CA-22 and using a Cone-Beam CT reconstruction algorithm) for obtaining the best imaging of low-contrast structures. In order to do this, an analytical model, re-adapted from the previous state-of-t

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Möllmann, Henriette Louise [Verfasser]. "Evaluation der Knochenarchitektur im diät-induzierten Osteoporosemodell der Ratte mittels Micro-CT / Henriette Louise Möllmann." Gießen : Universitätsbibliothek, 2016. http://d-nb.info/1092995846/34.

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Andersson, Sebastian. "Implementation of a reconstruction software and image quality assessment tool for a micro-CT system." Thesis, KTH, Fysik, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-183147.

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Yeslam, Hanin E. "The effect of acid etching on remineralization of incipient caries lesions : a micro-ct study /." Connect to resource online, 2009. http://hdl.handle.net/1805/2084.

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Thesis (M.S.D.)--Indiana University School of Dentistry, 2009.<br>Title from PDF t. p. (viewed Feb. 10, 2010) Advisor(s): Masatoshi Ando, Chair of the Research Committee, Carlos Gonzalez-Cabezas, Melvin Lund, Tien-Min Gabriel Chu, Michael Cochran. Curriculum vitae. Includes abstract. Includes bibliographical references (leaves 64-70).

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Bianculli, Antonella. "Analysis of the scale effect in different computed tomography systems on the evaluation of bone tissue parameters." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2016. http://amslaurea.unibo.it/11207/.

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Tra le patologie ossee attualmente riconosciute, l’osteoporosi ricopre il ruolo di protagonista data le sua diffusione globale e la multifattorialità delle cause che ne provocano la comparsa. Essa è caratterizzata da una diminuzione quantitativa della massa ossea e da alterazioni qualitative della micro-architettura del tessuto osseo con conseguente aumento della fragilità di quest’ultimo e relativo rischio di frattura. In campo medico-scientifico l’imaging con raggi X, in particolare quello tomografico, da decenni offre un ottimo supporto per la caratterizzazione ossea; nello specifico la mic

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Li, Yufei. "Joint super-resolution/segmentation approaches for the tomographic images analysis of the bone micro-structure." Thesis, Lyon, 2018. http://www.theses.fr/2018LYSEI125/document.

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L'ostéoporose est une maladie caractérisée par la perte de la masse osseuse et la dégradation de la micro-architecture osseuse. Bien que l'ostéoporose ne soit pas une maladie mortelle, les fractures qu'elle provoque peuvent entraîner de graves complications (lésions des vaisseaux et des nerfs, infections, raideur), parfois accompagnées de menaces de mort. La micro-architecture osseuse joue un rôle important dans le diagnostic de l'ostéoporose. Deux appareils de tomodensitométrie courants pour scanner la micro-architecture osseuse sont la tomodensitométrie quantitative périphérique à haute réso

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Barbar, Joseph Salem. "Influência do teor de ar incorporado no desempenho de concretos com diferentes teores de agregados." Universidade de São Paulo, 2016. http://www.teses.usp.br/teses/disponiveis/102/102131/tde-23012017-100027/.

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A utilização de aditivos incorporadores de ar em concretos é uma prática comum na construção civil e sua aplicação influencia significativamente diversas propriedades do concreto no estado fresco e endurecido. O objetivo deste estudo foi avaliar a influência do teor de ar incorporado, por meio de aditivo, no desempenho de concretos com diferentes teores de agregados. O programa experimental incluiu avaliação da eficiência de aditivos na incorporação de ar em pastas de cimento, análise microestrutural e ensaios para determinação de propriedades físicas, mecânicas e de durabilidade de concretos

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Bouhnaida, Zaïnaba. "Étude comparative de trois systèmes de préparation canalaire en endodontie : Étude in vitro en micro-CT." Thesis, Reims, 2018. http://www.theses.fr/2018REIMO201/document.

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Le but de cette étude est de comparer le respect de la morphologie canalaire après instrumentation à l’aide de trois systèmes de mise en forme canalaire différents : le One Shape NEW Generation®, le Wave One® et le Revo-S® grâce à une étude en Micro-tomographie assistée par ordinateur ou micro-CT (Computed Tomography). La mise en place d’une chaîne méthodologique totalement tridimensionnelle (3D) comprenant la reconstruction, le recalage et la segmentation a permis de traiter les images acquises et d’extraire les images recalées des canaux dentaires avant et après instrumentation. Les artéfact

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Shkarin, Roman [Verfasser]. "Machine learning-based automated segmentation with a feedback loop for 3D synchrotron micro-CT / Roman Shkarin." Karlsruhe : KIT-Bibliothek, 2021. http://d-nb.info/1228439400/34.

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Lemmon, Heber. "Methods for reduced platen compression (RPC) test specimen cutting locations using micro-CT and planar radiographs." Texas A&M University, 2003. http://hdl.handle.net/1969/310.

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Tuchman, Marni. "COMPARISON OF INSERTION ANGULATIONS MEASURED VIA BONE-TO-IMPLANT CONTACT OF MINI-SCREWS USING MICRO-CT." Master's thesis, Temple University Libraries, 2018. http://cdm16002.contentdm.oclc.org/cdm/ref/collection/p245801coll10/id/520294.

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Oral Biology<br>M.S.<br>Bone-to-implant contact of orthodontic mini-screws has been determined via Micro-CT to be a strong predictor of primary stability. Various insertion angulations, including both 900 and 500, have been reported as ideal for providing optimum primary stability. The aim of this investigation was to determine if a statistically significant difference exists in the bone-to-implant contact of mini-screws placed with an insertion angulation of 900 compared to those placed at 500 as determined via Micro-CT. Ten self-drilling, self-tapping orthodontic mini-screws (Aarhus,1.5mmx6m

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Dong, Pei. "Three-dimensional analysis of bone cellular tissue from SR CT Imaging." Thesis, Lyon, INSA, 2014. http://www.theses.fr/2014ISAL0022/document.

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Le système ostéocytaire soulève un intérêt croissant depuis quelques années car il est joue un rôle important dans l'adaptation de l'os. Le système ostéocytaire est inclus dans un réseau poreux dénommé le réseau lacuno-canaliculaire (LCN). L’observation du système ostéocytaire est difficile car les ostéocytes sont profondément enfouies dans la matrice osseuse et difficilement accessible par les techniques optiques. Récemment l’équipe de Creatis a montré la faisabilité d’imager le LCN en 3D grâce à la micro tomographie par rayonnement synchrotron. Toutefois, il n’existe actuellement pas de méth

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