Results 301 to 310 of about 1,009,330 (345)
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Photorefractive Effects, Materials, and Devices, 2001
Photorefractive effects that are affected by x-rays are used to design an x-ray imaging system with outstanding spatial resolution. An elementary holographic reflection grating is recorded in a photorefractive iron-doped lithium niobate crystal. The x-rays yield a conductivity pattern that erases the hologram locally.
Berben, Dirk, Andreas, B., Buse, Karsten
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Photorefractive effects that are affected by x-rays are used to design an x-ray imaging system with outstanding spatial resolution. An elementary holographic reflection grating is recorded in a photorefractive iron-doped lithium niobate crystal. The x-rays yield a conductivity pattern that erases the hologram locally.
Berben, Dirk, Andreas, B., Buse, Karsten
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Journal of Physics E: Scientific Instruments, 1978
The present state of the art of medical radiology is reviewed. After a discussion of contrast in the x-ray image, the geometry and fine structure of the image details are described. An account of modern x-ray image-transducing techniques, such as fluoroscopy and radiography, is followed by a short discussion of the detection and perception of the ...
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The present state of the art of medical radiology is reviewed. After a discussion of contrast in the x-ray image, the geometry and fine structure of the image details are described. An account of modern x-ray image-transducing techniques, such as fluoroscopy and radiography, is followed by a short discussion of the detection and perception of the ...
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IEEE Transactions on Biomedical Engineering, 1981
This paper describes a new type of X-ray Compton scatter imaging technique which has potential application to medical diagnostic radiography. This system detects the Compton interacted radiation which is scattered back toward the X-ray source and uses the information to generate an interior view of an object from a frontal backprojection imaging ...
B C, Towe, A M, Jacobs
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This paper describes a new type of X-ray Compton scatter imaging technique which has potential application to medical diagnostic radiography. This system detects the Compton interacted radiation which is scattered back toward the X-ray source and uses the information to generate an interior view of an object from a frontal backprojection imaging ...
B C, Towe, A M, Jacobs
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2015
Abstract Most materials are opaque, and their study is therefore carried out mainly through the observation of their surface. Materials are inert to most of the electromagnetic radiation, but X-rays form an exception and can be used as a very powerful tool to investigate the internal microstructure and composition of such materials.
Freddy Adams, Carlo Barbante
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Abstract Most materials are opaque, and their study is therefore carried out mainly through the observation of their surface. Materials are inert to most of the electromagnetic radiation, but X-rays form an exception and can be used as a very powerful tool to investigate the internal microstructure and composition of such materials.
Freddy Adams, Carlo Barbante
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Catheterization and Cardiovascular Interventions, 1999
The X-ray image intensifier converts an X-ray image into a bright visible light image. This enables image recording as well as viewing without dark adaptation. This tutorial describes the construction and function of the image intensifier tube and its associated optics.
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The X-ray image intensifier converts an X-ray image into a bright visible light image. This enables image recording as well as viewing without dark adaptation. This tutorial describes the construction and function of the image intensifier tube and its associated optics.
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2014
The X-ray imaging method is one of the non-destructive quality testing techniques currently used to inspect agricultural and food products. Identifying internal qualities, defects, and damages in fruits and vegetables; determining seed and nut qualities and defects; and determining composition and detecting contaminants in food products are achieved ...
Malcolm Sperrin, John Winder
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The X-ray imaging method is one of the non-destructive quality testing techniques currently used to inspect agricultural and food products. Identifying internal qualities, defects, and damages in fruits and vegetables; determining seed and nut qualities and defects; and determining composition and detecting contaminants in food products are achieved ...
Malcolm Sperrin, John Winder
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SPIE Proceedings, 1997
The paper presents the findings of an investigation into some characteristics of an X-ray imager. The imager is an assembly of modules, each incorporating a linear array of GaAs detectors connected electrically to a CCD multiplexer. The X-ray imager can be used in industrial and medical X-ray diagnostic equipment.© (1997) COPYRIGHT SPIE--The ...
Grachik H. Avetisyan +5 more
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The paper presents the findings of an investigation into some characteristics of an X-ray imager. The imager is an assembly of modules, each incorporating a linear array of GaAs detectors connected electrically to a CCD multiplexer. The X-ray imager can be used in industrial and medical X-ray diagnostic equipment.© (1997) COPYRIGHT SPIE--The ...
Grachik H. Avetisyan +5 more
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2001
In all X-ray imaging, a beam of X-ray photons passes through the anatomical region of interest, and produces an image from the transmitted photons. This chapter discusses X-ray production, the interaction of X-rays with matter, X-ray detection, mammography, fluoroscopy, computed tomography (CT) and CT angiography. It describes the spectrum of the X-ray
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In all X-ray imaging, a beam of X-ray photons passes through the anatomical region of interest, and produces an image from the transmitted photons. This chapter discusses X-ray production, the interaction of X-rays with matter, X-ray detection, mammography, fluoroscopy, computed tomography (CT) and CT angiography. It describes the spectrum of the X-ray
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Sequential femtosecond X-ray imaging
Nature Photonics, 2011Researchers demonstrate an X-ray holography method that records two independent images spaced by a femtosecond variable time delay. The concept overcomes the time limitations of two-dimensional area detectors by superimposing the separable X-ray holograms in a single detector exposure.
Günther, C. M. +10 more
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1990
Experiment 23.1: Recording Dot Maps. (a) Adjustment of CRT recording dot. Various WDS iron x-ray images obtained with different settings of the CRT dot brightness reveal the subjective nature of the analog dot mapping procedure. A dim recording dot (Figure A23.1b) provides a very weak image even where the iron concentration is high and no information ...
Charles E. Lyman +10 more
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Experiment 23.1: Recording Dot Maps. (a) Adjustment of CRT recording dot. Various WDS iron x-ray images obtained with different settings of the CRT dot brightness reveal the subjective nature of the analog dot mapping procedure. A dim recording dot (Figure A23.1b) provides a very weak image even where the iron concentration is high and no information ...
Charles E. Lyman +10 more
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