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Researchers from University of Antwerp Provide Details of New Studies and Findings in the Area of Ultramicroscopy

June 13, 2014

By a News Reporter-Staff News Editor at Science Letter -- Current study results on Ultramicroscopy have been published. According to news originating from Antwerp, Belgium, by NewsRx correspondents, research stated, "The conventional approach to object reconstruction through electron tomography is to reduce the three-dimensional problem to a series of independent two-dimensional slice-by-slice reconstructions. However, at atomic resolution the image of a single atom extends over many such slices and incorporating this image as prior knowledge in tomography or depth sectioning therefore requires a fully three-dimensional treatment."

Our news journalists obtained a quote from the research from the University of Antwerp, "Unfortunately, the size of the three-dimensional projection operator scales highly unfavorably with object size and readily exceeds the available computer memory. In this paper, it is shown that for incoherent image formation the memory requirement can be reduced to the fundamental lower limit of the object size, both for tomography and depth sectioning."

According to the news editors, the research concluded: "Furthermore, it is shown through multislice calculations that high angle annular dark field scanning transmission electron microscopy can be sufficiently incoherent for the reconstruction of single element nanocrystals, but that dynamical diffraction effects can cause classification problems if more than one element is present."

For more information on this research see: A memory efficient method for fully three-dimensional object reconstruction with HAADF STEM. Ultramicroscopy, 2014;141():22-31. Ultramicroscopy can be contacted at: Elsevier Science Bv, PO Box 211, 1000 Ae Amsterdam, Netherlands (see also Ultramicroscopy).

The news correspondents report that additional information may be obtained from W. Van den Broek, University of Antwerp, Dept. of Phys, iMinds Vis Lab, B-2610 Antwerp, Belgium. Additional authors for this research include A. Rosenauer, S. Van Aert, J. Sijbers and D. Van Dyck.

Keywords for this news article include: Europe, Antwerp, Belgium, Ultramicroscopy

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Source: Science Letter

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