Results 271 to 280 of about 511,439 (299)
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Nuclear Fusion, 1988
Measurements of soft X-ray emission from the JET plasma have been analysed with tomographic reconstruction methods. Because there are two detector arrays, two-dimensional images of X-ray emissivity are obtained without having to resort to rotation models.
P. Smeulders, Robert Granetz
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Measurements of soft X-ray emission from the JET plasma have been analysed with tomographic reconstruction methods. Because there are two detector arrays, two-dimensional images of X-ray emissivity are obtained without having to resort to rotation models.
P. Smeulders, Robert Granetz
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Circularly coded x-ray tomography
Applied Optics, 1984A 3-D radiographic transmission tomography technique based on coded-aperture imaging is described. In this technique an x-ray source moving on a circular path parallel to the film projects an image of the object onto the film and convolves this image with a circle.
Jack Sklansky, Satoshi Kawata
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Physics in Medicine and Biology, 2006
X-ray computed tomography (CT), introduced into clinical practice in 1972, was the first of the modern slice-imaging modalities. To reconstruct images mathematically from measured data and to display and to archive them in digital form was a novelty then and is commonplace today.
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X-ray computed tomography (CT), introduced into clinical practice in 1972, was the first of the modern slice-imaging modalities. To reconstruct images mathematically from measured data and to display and to archive them in digital form was a novelty then and is commonplace today.
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, 2008 We give a survey on the mathematics of computerized tomography. We start with a short introduction to integral geometry, concentrating on inversion formulas, stability, and ranges. We then go over to inversion algorithms. We give a detailed analysis of the filtered backprojection algorithm in the light of the sampling theorem.
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Journal of Petroleum Technology, 1987
Distinguished Author Series articles are general, descriptiverepresentations that summarize the state of the art in an area of technology bydescribing recent developments for readers who are not specialists in thetopics discussed. Written by individuals recognized as experts in the area, these articles provide key references to more definitive work and
Scott Lee Wellington, Harold J. Vinegar
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Distinguished Author Series articles are general, descriptiverepresentations that summarize the state of the art in an area of technology bydescribing recent developments for readers who are not specialists in thetopics discussed. Written by individuals recognized as experts in the area, these articles provide key references to more definitive work and
Scott Lee Wellington, Harold J. Vinegar
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Nondestructive Testing and Evaluation, 2005
This paper discusses issues related to the development of reconstructed tomography based on scattered X-ray radiation. For most X-ray tomography, based on collimated initial and scattered radiation, the distribution of the object density (linear scattering coefficient) is reconstructed by the number of counted photons scattered in the reconstructed ...
Y.V. Anosov +3 more
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This paper discusses issues related to the development of reconstructed tomography based on scattered X-ray radiation. For most X-ray tomography, based on collimated initial and scattered radiation, the distribution of the object density (linear scattering coefficient) is reconstructed by the number of counted photons scattered in the reconstructed ...
Y.V. Anosov +3 more
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X-ray tomography of whole cells
Current Opinion in Structural Biology, 2005X-ray tomography has been shown to provide insights into the internal structure of whole cells that can't be obtained by any other means. With recent advances in instrumentation and the advent of automated cryogenic sample stages, it has become possible to collect isotropic tomographic data from radiation-sensitive cells and to compute reconstructions ...
Mark A. Le Gros +3 more
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X-ray tomography on the TCV tokamak [PDF]
Plasma Physics and Controlled Fusion, 1996 The TCV tokamak offers outstanding variability of the plasma shape. Using x-ray tomography, the shape of the inner flux surfaces of a poloidal cross section of the plasma can be reconstructed, including fast variations due to MHD activity. Both the hardware and the software of the 200 channel system developed for TCV are described.
Anton, M. +8 more
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X-ray and ultrasonic tomography
Insight - Non-Destructive Testing and Condition Monitoring, 2003Conventional X-ray and ultrasonic NDT methods are very popular in Indian industry and their scope is growing at a steady pace. Tomographic extensions of these methods, however, have not made a mark yet. There is considerable activity in the country to develop CT scanners, X-ray as well as ultrasonic, for a variety of NDT applications.
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X-ray tomography of Schizosaccharomyces pombe
Differentiation, 2007The genetic tractability of the unicellular yeast Schizosaccharomyces pombe has resulted in it becoming an important model organism for the study of many eukaryotic cellular processes, in particular cell division. Over the past few years much progress has been made toward understanding the mechanisms that regulate eukaryotic cell division and the ...
Laurence D. Etkin +4 more
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