Auswahl der wissenschaftlichen Literatur zum Thema „Tomographie par absorption des rayons X“
Geben Sie eine Quelle nach APA, MLA, Chicago, Harvard und anderen Zitierweisen an
Machen Sie sich mit den Listen der aktuellen Artikel, Bücher, Dissertationen, Berichten und anderer wissenschaftlichen Quellen zum Thema "Tomographie par absorption des rayons X" bekannt.
Neben jedem Werk im Literaturverzeichnis ist die Option "Zur Bibliographie hinzufügen" verfügbar. Nutzen Sie sie, wird Ihre bibliographische Angabe des gewählten Werkes nach der nötigen Zitierweise (APA, MLA, Harvard, Chicago, Vancouver usw.) automatisch gestaltet.
Sie können auch den vollen Text der wissenschaftlichen Publikation im PDF-Format herunterladen und eine Online-Annotation der Arbeit lesen, wenn die relevanten Parameter in den Metadaten verfügbar sind.
Zeitschriftenartikel zum Thema "Tomographie par absorption des rayons X":
Wils, Patricia. „Analyses non destructives par tomographie à rayons X“. Les Nouvelles de l'archéologie, Nr. 159 (09.07.2020): 13–19. http://dx.doi.org/10.4000/nda.9047.
Gilli, R., F. Mattea, G. Martin und M. Valente. „X-RAY MICROTOMOGRAPHY TO CHARACTERIZE THE ROOT CANAL VOLUME EXTRACTED IN ENDODONTIC INSTRUMENTATION“. Anales AFA 33, Nr. 3 (15.10.2022): 70–76. http://dx.doi.org/10.31527/analesafa.2022.33.3.70.
Felizardo, Rufino, Alexis Thomas und Jean-Michel Foucart. „Techniques radiographiques utiles en orthodontie“. L'Orthodontie Française 83, Nr. 1 (März 2012): 11–22. http://dx.doi.org/10.1051/orthodfr/2012003.
Aidi, M., F. Feuillebois, A. Lasek, R. Anthore, C. Petipas und X. Auvray. „Mesure de la vitesse de sédimentation d'une suspension par absorption de rayons X“. Revue de Physique Appliquée 24, Nr. 12 (1989): 1077–84. http://dx.doi.org/10.1051/rphysap:0198900240120107700.
BONARDEL, G., E. GONTIER, C. DECHAUD, M. SORET und H. FOEHRENBACH. „Apport de la tomographie par émission de positons dans la prise en charge des cancers du testicule“. Médecine et Armées Vol. 39 No. 1, Volume 39, Numéro 1 (01.02.2011): 33–40. http://dx.doi.org/10.17184/eac.6430.
Bachari, Khaldoun, Rabah Bouarab und Ouiza Chérifi. „Production d’Hydrogène via le Procédé Catalytique CH4 + CO2“. Journal of Renewable Energies 4, Nr. 2 (31.12.2001): 101–5. http://dx.doi.org/10.54966/jreen.v4i2.1002.
Doreau-Malioche, Jeanne, Gaël Combe und Gioacchino Viggiani. „Étude du comportement de l’interface sable-pieu sous chargement axial monotone et cyclique à l’échelle granulaire“. Revue Française de Géotechnique, Nr. 166 (2021): 4. http://dx.doi.org/10.1051/geotech/2021005.
Verger, Louisiane, Olivier Dargaud und Laurent Cormier. „Couleurs et émaux. Des décors de la Manufacture de Sèvres à la réactivité des pigments“. Reflets de la physique, Nr. 63 (Oktober 2019): 26–29. http://dx.doi.org/10.1051/refdp/201963026.
Martis, N., J. P. Chaborel, S. Liguori, L. Marcq und D. Quinsat. „Intérêt clinique de la tomographie par émission de positons couplée à la tomodensitométrie à rayons X dans la dermatomyosite (à propos de cinq cas)“. La Revue de Médecine Interne 34 (Juni 2013): A127. http://dx.doi.org/10.1016/j.revmed.2013.03.099.
Dumont, Léonard, Stefan Wirth, Matthieu N. Boone, Iván Josipovic, Sylvia Lycke, Pieter Tack, Peter Vandenabeele und Guy De Mulder. „A Unique Case of ‘Counting Marks’ Revealed by Tomography on a Middle Bronze Age Sword from Champagneux (France, Savoie)“. Acta Archaeologica 92, Nr. 1 (29.12.2021): 3–15. http://dx.doi.org/10.1163/16000390-12340001.
Dissertationen zum Thema "Tomographie par absorption des rayons X":
Shi, Qihan. „Étude multiéchelle des composites par tomographie de rayons X“. Paris, CNAM, 2003. http://www.theses.fr/2003CNAM0490.
In this dissertation, one presents a multiscaled research by the X-ray computerized tomography to characterize the wooden plastic materials and rubbers about their physicochemical and viscoelastic properties, as well as their damage and fracture behaviours. At mesoscopic level, the homogeneous study on phase and the non-destructive control on defects and inclusions demonstrate the powerful capacity of our medical scanner. On the microscopic scale, the phenomena of crystallisation by tension and under the low temperature have been interpreted by the linear coefficient of X-rays attenuation. From macroscopic point of view, the data obtained from various mechanical tests such as fracture, cavitations, relaxation and creep have been compared with tomographic results. Finally, a table is shown to compare the CT with other microscopic method
Cazasnoves, Anthony. „Représentation par maillage adapté pour la reconstruction 3D en tomographie par rayons X“. Thesis, Lyon, INSA, 2015. http://www.theses.fr/2015ISAL0121/document.
3D X-Ray computed tomography reconstruction is a method commonly used, nowadays, in both medical and non destructive testing fields to reconstruct a 3D object from a set of its 2D projections. The reconstruction space usually is sampled on a regular grid of isotropic voxels, thus inducing an increase in the number of cells used in order to get a satisfactory spatial resolution. This representation hence have a direct impact on the growth in computational cost of each reconstruction iteration and imposes the storage of volumes of considerable memory storage footprints. This dissertation introduces an approach to build an adapted sampling of the object of interest directly from a sparse dataset of projections and prior to any tomographic reconstruction. Instead of the usual voxel lattice, we make use of a tetrahedral mesh that tightly fits the object structure : cells density increases close to its interfaces and decreases in homogeneous regions. To create such a mesh, the first step of this work consists in the detection of edges in the 2D projection images. Segmentation quality being paramount for further stages, we introduce a statistical approach to automatically select crucial parameters of the selected edge detector - Canny's filter. This structural information then is merged within the 3D volume of reconstruction as a pointcloud adequately sampling the 3D interfaces of the studied object. To do so, we perform a direct backprojection of the 2D edge maps to obtain a rough 3D map of the desired interfaces. The points composing the cloud are placed according to this map by automated filtering of the rough map. This automation is attained by statistical approach. The adapted mesh is finally obtained by classical constrained Delaunay tetrahedralization algorithm on this cloud. CT reconstruction is performed on this new sampling by using usual iterative algorithms for which suitable models of projector/backprojector are proposed. Our experiments show that, using a sparse dataset - e.g. 30 projections - our method provides pointclouds tightly sampling the object interfaces. The compression achieved in the number of unknowns to estimate and in memory consumption for volume storage is sizable, vouching for the relevance of this sampling. Produced reconstructions are promising and the quality of meshes sufficient to contemplate their use in simulation applications, such as finite element methods
Mandolini, Tommaso. „Microstructural evolution of polymineralic aggregates deformed under high pressure and temperature : an in-situ and post-mortem study on olivine+serpentine“. Electronic Thesis or Diss., Université de Lille (2022-....), 2022. http://www.theses.fr/2022ULILR047.
At plate tectonic boundaries, the lithosphere is deformed and strain localization occurs up to kilometers-scale, which can manifest in form of shear zones. The strain localization suggests the strength of the lithosphere is locally weakened. The formation of interconnected layers of weaker minerals in the lithosphere is a potential mechanism to achieve such weakening. Serpentinized peridotite is commonly found within and between tectonic plates. It is mainly composed of olivine and serpentine minerals. The latter is generally accepted to be weaker than olivine at geological strain rates. During deformation, strain is thus expected to preferentially partition into serpentine than into olivine. This can lead to the formation of interconnected weak layers (IWL) of serpentine where strain localizes.The present work is based on microstructural investigation to infer the strain accommodation in rocks. Olivine+serpentine aggregates with two compositions (10 and 20 vol.% serpentine) are used as a proxy for partially serpentinized peridotites. The aggregates are experimentally deformed in torsion at high pressures (HP, > 2 GPa) and high temperatures (HT, > 300°C) at an equivalent strain rate of 10-4 s-1. The experiments are coupled with in-situ absorption contrast X-ray tomography. I obtain 2D and 3D information on connectivity and structural layering in the microstructure of the ‘weak' serpentine. Electron microscopy is performed on recovered samples to link the in-situ X-ray tomography observations to the plastic properties of the phases.I first outline experimental and image-data processing procedures specific to in-situ HP experimental deformation. Then, I study the deformation of the aggregates with increasing shear deformation at multiple scales of observations. The main aim is to observe the onset and development of IWL in its microstructure. The relations between the morphology and plastic properties of the phases in the rock are investigated to understand the strain localization in serpentinized peridotite.The main results show the deformation regime in olivine+serpentine aggregates can be described as semi-brittle, with the dominant phase of olivine (‘stronger') mainly displaying brittle deformation, whereas the serpentine (‘weaker') showing a dominant ductile-style deformation. A strain γ of ca. 4-5, serpentine content of ca. 20 vol.%, and initial fraction of large clusters >15 vol.% determine the condition for IWL configuration in the olivine+serpentine aggregates. Conversely, at serpentine content of ca. 10 vol.%, IWL do not occur, independently of strain or initial clusters size distribution of serpentine. This is more consistent with a load-bearing framework (LBF) behavior, where the stronger olivine grains are jammed, and during deformation crush one another, leading to grain size reduction and accommodating much of the deformation in the rock. These findings suggest contents of serpentine >10 vol.% or ca. 20 vol.% define a threshold for crucial changes in the morphology, connectivity, percolation, of the weak serpentine in serpentinized peridotites under shear. This may lead to important changes in deformation behavior and mechanical properties of the rock.In light of these findings, I give some perspectives for strain localization and shear zones initiation in the lithosphere
Wils, Patricia. „Tomographie par rayons X : correction des artefacts liés à la chaîne d'acquisition“. Phd thesis, INSA de Lyon, 2011. http://tel.archives-ouvertes.fr/tel-00708545.
Zhang, Tao. „Imagerie multi-résolution par tomographie aux rayons X : application à la tomographie locale en science des matériaux“. Phd thesis, Université de Grenoble, 2012. http://tel.archives-ouvertes.fr/tel-00876871.
Thibaudeau, Christian. „Développement d'algorithmes de reconstruction statistique appliqués en tomographie rayons-X assistée par ordinateur“. Mémoire, Université de Sherbrooke, 2010. http://savoirs.usherbrooke.ca/handle/11143/1539.
Laloum, David. „Tomographie par rayons X haute résolution : application à l'intégration 3D pour la microélectronique“. Thesis, Université Grenoble Alpes (ComUE), 2015. http://www.theses.fr/2015GREAY067/document.
In this thesis, an original non-destructive 3D characterization technique has been developed : the X-ray tomography hosted in a scanning electron microscope. This instrument is not widely used in the microelectronics field. This computed tomography (CT) system has been used for the high resolution analysis of metallic interconnections such as copper pillars and through silicon vias (TSVs). These components are widely used in the field of 3D integration to make vertical stacks of interconnected chips.The most significant contributions of this thesis are : (1) the enhancement of the analytical capabilities of the instrument. Many studies – simulations and experiments – have been performed in order to determine and improve the 2D and 3D resolutions of this imaging system. It has been shown that the 2D resolution of this instrument can reach 60 nanometers. The quality of the projections and reconstruction has also been improved through the implementation of iterative reconstruction algorithms and various projections alignment methods. (2) The reduction of the scanning time by a factor 3 through the implementation of constrained reconstruction techniques such as the reconstruction method based on the total variation minimization. (3) The application of effective correction algorithms for removing reconstruction artefacts due to the polychromaticity of the X-ray beam. (4) The application of all these reconstruction methods and algorithms on real cases encountered by materials engineers
Arrio, Marie-Anne. „Dichroisme circulaire magnetique d'aimants a base moleculaire par absorption des rayons x“. Paris 11, 1995. http://www.theses.fr/1995PA112140.
Fosso, Philippe. „Etude in-situ de l'endommagement des matériaux composites à matrice organique par tomographie à rayons X“. Châtenay-Malabry, Ecole centrale de Paris, 1992. http://www.theses.fr/1992ECAP0250.
Freud, Nicolas. „Modélisation et simulation de systèmes d'imagerie par rayons X ou gamma“. Lyon, INSA, 2003. http://theses.insa-lyon.fr/publication/2003ISAL0061/these.pdf.
This PhD thesis is devoted to the development of a computer code enabling to simulate in a short time realistic radiological images, taking into account the main physical parameters acting in an X- or gamma-ray imaging chain. In the first part, we carry out a general survey of the state of the art in the field of radiation transport simulation. This study leads us to choose a deterministic approach and to seek specific algorithms, devoted to the simulation of radiological images and, at first, accounting only for the directly transmitted radiation. The proposed solutions, which emphasize execution speed and robustness, are implemented in a code named VXI (Virtual X-ray Imaging). VXI makes it easy to carry out simulations in realistic imaging configurations (polychromatic spectrum, objects with complex geometry. . . The second part of this thesis broaches the simulation of the radiation scattered by the inspected objects. We propose a deterministic method to simulate first-order photon scattering without having recourse to a parallel computing architecture. This method is validated by comparing its results with the ones given by the Monte Carlo code Geant4
Bücher zum Thema "Tomographie par absorption des rayons X":
Bushong, Stewart C. Computed tomography. New York: McGraw-Hill, Health Professions Divison, 2000.
Bushong, Stewart C. Computed Tomography. McGraw-Hill Medical, 2000.
Bushong, Stewart C. Computed Tomography. McGraw-Hill Medical, 2000.