JAPC - Glass Ceramics and Imaging

Speaker: Dr. Jacqueline A. Johnson, Argonne National Laboratory

Topic: "Glass Ceramics and Imaging"

Time: 2:00 PM, Wednesday, February 14, 2007
(NOTE the unusual time)

Place: P-148

Abstract: A new medical imaging plate has been designed and tested based on a fluorochlorozirconate glass-ceramic material, seeded with BaCl₂ nanocrystals, doped with an optical activator, in this case Eu²⁺. The structure-property relationships of these glass ceramics will be described using techniques such as X-ray diffraction (XRD), X-ray Absorption Near-Edge Structure (XANES), Differential Scanning Calorimetry (DSC), Photostimulated Luminescence (PSL), and Mössbauer spectroscopy.
The imaging ability of the plate has been tested at beamline 2BM at the Advanced Photon Source (APS), Argonne National Laboratory. The setup and images will be shown as well as the design of a new mammography system, which is competitive with state-of-the art digital radiography (DR) systems. Current systems will be compared and contrasted. Although the current focus of the plate is on mammography, preliminary discussions have been held on its potential for dual energy computed tomography (CT). Ideas on this potential application will also be presented.

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