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Glass Ceramics for High-Resolution Imaging

[+] Author Affiliations
J. A. Johnson

University of Tennessee Space Institute, Tullahoma, TN

R. Weber

Materials Development, Inc., Evanston, IL

A. I. Kolesnikov

Oak Ridge National Laboratory, Oak Ridge, TN

S. Schweizer

Fraunhofer Center for Silicon Photovoltaics, Halle, Germany

Paper No. IMECE2008-66205, pp. 43-48; 6 pages
  • ASME 2008 International Mechanical Engineering Congress and Exposition
  • Volume 2: Biomedical and Biotechnology Engineering
  • Boston, Massachusetts, USA, October 31–November 6, 2008
  • Conference Sponsors: ASME
  • ISBN: 978-0-7918-4863-0 | eISBN: 978-0-7918-3840-2
  • Copyright © 2008 by ASME


Glass-ceramic materials are being developed for use in digital mammography systems. The materials are transparent x-ray storage phosphors, which are potentially less expensive than competing materials with superior performance. The materials do not suffer from loss of resolution and increased noise due to light scattering from grain boundaries, as do the currently available polycrystalline materials. The glass ceramics are based on Eu2+ -doped fluorochlorozirconate glasses. These can be heat treated to nucleate Eu-doped barium chloride nanocrystals. The glass ceramic converts ionizing radiation (typically x-rays) into stable electron-hole pairs that can be “read” by scanning a stimulating light beam across the glass to cause photostimulated luminescence (PSL) emission. Measurements on the materials are ongoing to elucidate structure-property relationships developed as a result of introducing rare-earth ions and modifying process conditions. Image quality measurements indicate that the current material competes with state-of-the-art x-ray imaging plates. The paper presents results on structure, properties and future directions of the materials described above.

Copyright © 2008 by ASME



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