Results 291 to 300 of about 29,331 (339)
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Fresnel Coherent Diffractive Imaging
Physical Review Letters, 2006We present an x-ray coherent diffractive imaging experiment utilizing a nonplanar incident wave and demonstrate success by reconstructing a nonperiodic gold sample at 24 nm resolution. Favorable effects of the curved beam illumination are identified.
Williams, G. J. +7 more
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Magnetic resonance diffractive imaging
IEEE Transactions on Biomedical Engineering, 2002Magnetic resonance (MR) diffractive imaging is proposed as a new approach to MR angiography. The expression of the nuclear MR signal is similar to the equation for the Fresnel diffraction of a three-dimensional (3-D) object in light or sound waves. The proposed technique offers the possibility of fast angiographic imaging and the on-line reconstruction
Satoshi, Ito +2 more
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Osteologie, 2010
ZusammenfassungDiffraction Enhanced Imaging (DEI) ist ein auf Röntgenstrahlen basierendes neues Bildgebungsverfahren, das als Phasenkontrasttechnik eine brillante Darstellung der Knochen, Gelenke und Weichteile ermöglicht. Die Potenz dieses Verfahrens als DEI-CT zur Diagnostik von Veränderungen der Spongiosaarchitektur wird am Beispiel der ...
J. Mollenhauer +5 more
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ZusammenfassungDiffraction Enhanced Imaging (DEI) ist ein auf Röntgenstrahlen basierendes neues Bildgebungsverfahren, das als Phasenkontrasttechnik eine brillante Darstellung der Knochen, Gelenke und Weichteile ermöglicht. Die Potenz dieses Verfahrens als DEI-CT zur Diagnostik von Veränderungen der Spongiosaarchitektur wird am Beispiel der ...
J. Mollenhauer +5 more
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2020
We present a novel computational imaging principle that combines diffractive optics with line (1D) sensing. When light passes through a diffraction grating, it disperses as a function of wavelength. We exploit this principle to recover 2D and even 3D positions from only line images.
Mark Sheinin +3 more
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We present a novel computational imaging principle that combines diffractive optics with line (1D) sensing. When light passes through a diffraction grating, it disperses as a function of wavelength. We exploit this principle to recover 2D and even 3D positions from only line images.
Mark Sheinin +3 more
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1992
Abstract Several classical imaging processes, such as transmission light and electron microscopy, make use of a lens-the objective lens-to gather a fraction of the radiation scattered by the sample. The sample acts as the object of the lens, which, as shown in Figure 6.1, recreates an image of the sample in the image plane of the lens ...
D B Williams, K S Vecchio
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Abstract Several classical imaging processes, such as transmission light and electron microscopy, make use of a lens-the objective lens-to gather a fraction of the radiation scattered by the sample. The sample acts as the object of the lens, which, as shown in Figure 6.1, recreates an image of the sample in the image plane of the lens ...
D B Williams, K S Vecchio
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Proceedings of the IEEE, 1979
This paper briefly reviews the field of Bragg-diffraction imaging starting with the history of the investigation of light-sound interaction which led up to the development of the Bragg-diffraction imaging systems. The operation of two different systems are described along with a discussion of their advantages and disadvantages.
M. Ahmed, G. Wade
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This paper briefly reviews the field of Bragg-diffraction imaging starting with the history of the investigation of light-sound interaction which led up to the development of the Bragg-diffraction imaging systems. The operation of two different systems are described along with a discussion of their advantages and disadvantages.
M. Ahmed, G. Wade
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Keyhole electron diffractive imaging (KEDI)
Acta Crystallographica Section A Foundations of Crystallography, 2012Electron diffractive imaging (EDI) relies on combining information from the high-resolution transmission electron microscopy image of an isolated kinematically diffracting nano-particle with the corresponding nano-electron diffraction pattern. Phase-retrieval algorithms allow one to derive the phase, lost in the acquisition of the diffraction pattern ...
Liberato De Caro +4 more
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Diffraction elimination of slow images
CLEO/Europe - EQEC 2009 - European Conference on Lasers and Electro-Optics and the European Quantum Electronics Conference, 2009All classical wave fields are subjected to diffraction throughout their propagation. In many systems, a reduction or elimination of the diffraction spreading of beamlike fields are obtained by manipulating the susceptibility in real space and inducing a gradient of the index of refraction. Similarly to wave-guiding, only specific modes may propagate in
O. Firstenberg +3 more
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Diffraction imaging for fracture detection
69th EAGE Conference and Exhibition - Workshop Package, 2007The present way in fractures studies usually consists in using indirect indicators such as anisotropy, well log information etc. On the other hand, it is diffracted waves that contain direct and the most valuable information about fracture presents in the subsurface.
E. Landa, S. Fomel, T.M. Taner
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Dynamic sample imaging in coherent diffractive imaging
Optics Letters, 2011As the resolution in coherent diffractive imaging improves, interexposure and intraexposure sample dynamics, such as motion, degrade the quality of the reconstructed image. Selecting data sets that include only exposures where tolerably little motion has occurred is an inefficient use of time and flux, especially when detector readout time is ...
Jesse N, Clark +7 more
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