Results 221 to 230 of about 259,417 (265)
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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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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 +2 more
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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.
S, Kawata, J, Sklansky
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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 ...
Weiwei, Gu +3 more
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Electronics and Power, 1978
X-ray computed tomography, derived from the Greek meaning 'to write a slice or section', has been commercially available from 1972, after its invention and development by G.N. Hounsfield at the central research laboratories of EMI in 1967. Since then, its impact on the medical world has been as great as the discovery of X-rays itself, and despite the ...
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X-ray computed tomography, derived from the Greek meaning 'to write a slice or section', has been commercially available from 1972, after its invention and development by G.N. Hounsfield at the central research laboratories of EMI in 1967. Since then, its impact on the medical world has been as great as the discovery of X-rays itself, and despite the ...
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X-ray tomography for microstructural objects
Applied Optics, 1981A high-resolution high-contrast x-ray tomography system for imaging the structure of submillimeter-sized objects is constructed. A precise data acquisition mechanism to realize a sharp pencil beam, use of an optimum x-ray band to achieve high contrast, deconvolution processing to restore blurred projections, and the iterative revision method to ...
T, Sato +3 more
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X-ray tomography by grid coding
Applied Optics, 1980Three-dimensional objects are coded using a crossbar grid by an array of simultaneously flashed x-ray tubes. This is a new version of flashing tomosynthesis. The technique is experimentally tested using radiographs of a heart phantom.
E, Klotz, U, Tiemens, H, Weiss
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Dynamic X-ray computed tomography
Proceedings of the IEEE, 2003Dynamic computed tomography (CT) imaging aims at reconstructing image sequences where the dynamic nature of the living human body is of primary interest. The main applications concerned are image-guided interventional procedures, functional studies and cardiac imaging.
Stéphane Bonnet +5 more
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X‐ray‐transmission computed tomography
Medical Physics, 1977The immediate goal of clinically based x‐ray‐transmission computed tomography (CT) is to provide a measurement of the x‐ray linear attenuation coefficient in cross section with the ultimate goal of impacting on patient managerment and care. To do this with the accuracy needed for clinical goals requires the careful integration of x‐ray physics ...
E C, McCullough, J T, Payne
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Ultrahigh-Resolution X-ray Tomography
Science, 1994Ultrahigh-resolution three-dimensional images of a microscopic test object were made with soft x-rays collected with a scanning transmission x-ray microscope. The test object consisted of two different patterns of gold bars on silicon nitride windows that were separated by ∼5 micrometers.
W S, Haddad +5 more
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