Results 271 to 280 of about 121,325 (308)

Laboratory-based x-ray micro-tomography with submicron resolution

SPIE Proceedings, 2006
X-ray Microtomography bridges the 3D analysis gap between conventional x-ray tomography and TEM tomography. The use of a laboratory-based microfocus source opens up the opportunity to gain additional benefits from in-line phase contrast for enhancing the visibility of fine features, cracks, voids and boundaries in individual views.
S. Mayo, P. Miller, S. W. Wilkins, D. Gao, T. Gureyev   +4 more
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Spectral X-Ray Computed Micro Tomography: 3-Dimensional Chemical Imaging by Using a Pixelated Semiconductor Detector

2021
We present a new approach to 3-dimensional (3D) chemical imaging based on X-ray computed micro tomography (micro-CT), which enables the analysis of the internal elemental chemistry. The method uses a conventional laboratory-based micro-CT scanner (Tescan CoreTOM) equipped with a cadmium telluride (CdTe) semiconductor line detector (Tescan PolyDet ...
Sittner, J., Merkulova, M., Da Assuncao Godinho, J. R., Renno, A., Cnudde, V., Boone, M., Schryver, T., Loo, D., Roine, A., Liipo, J., Guy, B. M.   +10 more
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Fast X-ray micro-tomography for low-Z materials

Journal of Instrumentation, 2015
X-ray phase-contrast micro-tomography (XPCMT) is an important method for the non-destructive acquisition of internal information from samples composed of low-Z elements. During the development of XPCMT, its spatial resolution has gradually been improved; however, insufficient attention has been directed towards the improvement of its time resolution ...
L. Xu, R. Chen, G. Du, H. Xie, T. Xiao
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Cold neutron and monochromatic X-ray micro-tomography

AIP Conference Proceedings, 2001
Both neutrons and X-rays have very interesting properties for tomography. Tunable monochromatic X-ray beams were used for element sensitive tomography of samples containing heavy elements using the K-edge dichromatic scanning technique. This research was done at the high-energy beam-line of the ESRF (France).
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X-Ray Computed Transaxial Micro Tomography in Dental Research

1996
A digital x-ray imaging system consisting of microfocus x-ray apparatus, image intensifier, framegrabber, and PC has been extended to work as a computerised transaxial microtomograph by adding an object turntable and some acquisition and reconstruction software.
Thuesen Gøsta, Bjørndal Lars, Darvann Tron   +2 more
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Characterisation of enamel white spot lesions using X-ray micro-tomography

Journal of Dentistry, 2007
The aim of this study was to characterise the mineral density (MD) of natural enamel white spot lesions (WSLs) using X-ray micro-tomography calibrated with different density hydroxyapatite phantoms.Seven natural WSLs from four extracted non-carious premolar teeth were scanned at a voxel size of 7.6 microm using a desktop X-ray micro-tomography system ...
Tiffany T Y, Huang, Allan S, Jones, Li Hong, He, M Ali, Darendeliler, Michael V, Swain   +4 more
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X-Ray Micro-Tomography and Modeling of Cold-Sprayed Coated Powders

International Thermal Spray Conference, 2014
Abstract In the present study, X-ray microtomography is used to examine cold-sprayed tantalum splats on copper substrates. To resolve tantalum splats intermeshed with other splats of the same chemical composition, a contrasting medium of some sort is required.
Delloro, Francesco, Faessel, Matthieu, Proudhon, Henry, Jeulin, Dominique, Jeandin, Michel, Meillot, E., Bianchi, L.   +6 more
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Statistical iterative reconstruction for multi-contrast x-ray micro-tomography

SPIE Proceedings, 2015
Scanning times have always been an important issue in x-ray micro-tomography. To reach high-quality reconstructions the exposure times for each projection can be very long due to small detector pixel sizes and limited flux of x-ray sources. In addition, the required number of projections is a factor which limits a reduction of exposure beyond a certain
S. Allner, A. Velroyen, A. Fehringer, F. Pfeiffer, P. B. Noël   +4 more
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X-ray micro tomography in the scanning electron microscope

Proceedings, annual meeting, Electron Microscopy Society of America, 1978
Reconstructive tomography is a new technique in diagnostic radiology for imaging cross-sectional planes of the human body /1/. A collimated beam of X-rays is scanned through a thin slice of the body and the transmitted intensity is recorded by a detector giving a linear shadow graph or projection (see fig. 1).
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X-ray micro-tomography an attractive characterisation technique in materials science

Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, 2003
X-ray tomography is a non-destructive technique which provides 3D information of materials. It is consequently very attractive in Materials Science since the relation between macroscopic properties and the micro-structure of a material is very frequently required.
Salvo, S, Cloetens, C, Maire, Éric, Zabler, S, Blandin, J.J, Buffiere, Jean-Yves, Ludwig, Wolfgang, Boller, E, Bellet, D, Josserond, C   +9 more
openaire   +2 more sources