FRONTIERS IN MATERIALS SCIENCE
VINSE COLLOQUIUM SERIES
Dr. Jacqueline Johnson
The University of Tennessee Space Institute
"Mammography and Implant Coatings"
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 present 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 be presented. In addition, diamond-like carbon (DLC) films are being explored as coatings for medical implants and devices. Properties pertaining to DLC as a biomaterial will be elucidated.