Results 191 to 200 of about 31,005 (221)

Microtomography at GeoSoilEnviroCARS

SPIE Proceedings, 2004
A facility for x-ray computed microtomography (CMT) is operating as a national user facility for earth and environmental sciences research on the bending magnet beamline at the GeoSoilEnviroCARS sector at the Advanced Photon Source (APS). The APS bending magnet has a critical energy of 20 keV, and thus provides high flux at photon energies up to 100 ...
Mark L. Rivers, Yanbin Wang, Takeyuki Uchida   +2 more
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X-ray microtomography

Proceedings, annual meeting, Electron Microscopy Society of America, 1988
We have developed a new X-ray microscope which produces complete three dimensional images of samples. The microscope operates by performing X-ray tomography with unprecedented resolution. Tomography is a non-invasive imaging technique that creates maps of the internal structure of samples from measurement of the attenuation of penetrating radiation. As
H.W. Deckman, B.F. Flannery, J.H. Dunsmuir, K.D' Amico   +3 more
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Three-Dimensional X-Ray Microtomography

Science, 1987
The new technique of x-ray microtomography nondestructively generates three-dimensional maps of the x-ray attenuation coefficient inside small samples with approximately 1 percent accuracy and with resolution approaching 1 micrometer. Spatially resolved elemental maps can be produced with synchrotron x-ray sources by scanning samples at energies just ...
B P, Flannery, H W, Deckman, W G, Roberge, K L, D'Amico   +3 more
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Microfocus radiography producing microtomography

Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 1994
Abstract A microtomographic system has been made using a real time microfocus radiographic system and a image digitalizer schedule. The aim of this system was reaching an acceptable data acquisition time, which was hardly reduced compared to traditional microtomographic systems that employ conventional X-ray sources and detectors.
J.T. De Assis, R.T. Lopes, J.L. Rodrigues   +2 more
openaire   +1 more source

X-ray diffraction microtomography

Measurement Science and Technology, 1993
A table-top system has been developed for tomographic imaging of the internal structure of objects of low mass density at sub-millimetre resolution. Images are based on the X-ray diffraction properties of constituent materials, and are reconstructed from tomographic data using summation-filtered back-projection.
J A Grant, M J Morgan, J R Davis, D R Davies, P Wells   +4 more
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Microtomography by heavy ions

Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, 1990
Abstract A computer program for an IBM compatible PC using the method of filtered backprojection and the hardware necessary for microtomography have been developed for the GSI heavy ion microprobe. The spatial resolution so far achieved is 3 μm with argon ions of 1.4 MeV nucleon . The special usefulness of heavy ions for microtomography and the
B.E. Fischer, C. Mühlbauer
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Synchrotron Microtomography of Composites

MRS Proceedings, 1988
AbstractX-ray computed tomography (CT) uses absorption profiles from many different viewing directions to reconstruct the two-dimensional distribution of x-ray absorptivity within a slice of the sample. The tunability, high brightness and parallelism of synchrotron radiation are critical to high resolution (0.001mm), high contrast (1%) CT or ...
S. R. Stock, J. H. Kinney, T. M. Breunig, U. Bonse, S. D. Antolovich, Q. C. Johnson, M. C. Nichols   +6 more
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Biological tissues analysis by XRF microtomography

Applied Radiation and Isotopes, 2010
The main of this work is to determine the elemental distribution in breast and prostate tissue samples in order to verify the concentration of some elements correlated with characteristics and pathology of each tissue observed by the X-ray transmission microtomography (microCT).
G R, Pereira, H S, Rocha, C, Calza, M J, Anjos, C A, Pérez, R T, Lopes   +5 more
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Photoluminescence microtomography of diamond

Philosophical Magazine B, 1990
Abstract The three-dimensional distribution of various types of point defects in diamond crystals has been investigated by means of new photoluminescence tomographic techniques. In relatively perfect natural yellow diamonds the zoned distribution of blue luminescent N3 and blue–green luminescent 463·0 nm centres was mapped.
W. J. P. Van Enckevort, E. P. Visser
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Biological Applications of Microtomography

1988
X-ray microtomography can be used to obtain, non-destructively, 3-dimensional information about biological structures at a resolution of a few microns. The information may be purely morphological, but if accurately monochromatic X-radiation is used, the results are in the form of the 3-dimensional distribution of the linear absorption coefficient.
J. C. Elliott, R. Boakes, S. D. Dover, D. K. Bowen   +3 more
openaire   +1 more source