منابع مشابه
Diffraction enhanced x-ray imaging.
Diffraction enhanced imaging is a new x-ray radiographic imaging modality using monochromatic x-rays from a synchrotron which produces images of thick absorbing objects that are almost completely free of scatter. They show dramatically improved contrast over standard imaging applied to the same phantom. The contrast is based not only on attenuation but also the refraction and diffraction proper...
متن کاملDiffraction Enhanced X-ray Imaging of Biological Tissues
The purpose of this study was to explore the potential of refraction contrast X-ray imaging of biological systems. Images of a UK mammography test phantom, mouse lungs, heart, liver and legs, together with a human finger, were recorded using the SYRMEP beamline. The technique used has become to be known as ‘Diffraction Enhanced Imaging’ (DEI), which utilises a silicon crystal placed between the...
متن کاملQuantitative comparison of imaging performance of x-ray interferometric imaging and diffraction enhanced imaging.
For detailed biomedical observations using the optimum phase-contrast x-ray imaging, quantitative comparisons of imaging performances of two major imaging methods--x-ray interferometric imaging (XII) and diffraction enhanced imaging (DEI)--were performed. Density sensitivity and spatial resolution of each imaging method were evaluated using phantom tomograms obtained by each method with the sam...
متن کاملHard X ray holographic diffraction imaging.
We determine the absolute electron density of a lithographically grown nanostructure with 25 nm resolution by combining hard x-ray Fourier transform holography with iterative phase retrieval methods. While holography immediately reveals an unambiguous image of the object, we deploy in addition iterative phase retrieval algorithms for pushing the resolution close to the diffraction limit. The us...
متن کاملHigh-resolution X-ray diffraction and imaging
This issue of Journal of Applied Crystallography includes some highlights of the 11th Biennial Conference on High-Resolution X-ray Diffraction and Imaging (XTOP), held in St Petersburg in 2012.
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ژورنال
عنوان ژورنال: Physics in Medicine and Biology
سال: 1997
ISSN: 0031-9155,1361-6560
DOI: 10.1088/0031-9155/42/11/001