Gratings-based phase contrast imaging is a promising new radiographic technique providing three distinct contrast mechnisms, absorption, phase, and scatter, using a conventional x-ray tube source. We investigate the signatures available in these three contrast mechanisms with particular attention towards potential homeland security applications. We find that the scatter mode in particular is sensitive to textured materials, enabling lowered detection limits than absorption for materials such as powders. We investigate the length scales to which our imaging system is sensitive.
Revised: March 26, 2012 |
Published: June 13, 2011
Citation
Miller E.A., T.A. White, B.S. McDonald, A. Seifert, and M.J. Flynn. 2011.Phase Contrast X-ray Imaging Signatures for Homeland Security Applications. In IEEE Nuclear Science Symposium Conference Record (NSS/MIC 2010), October 30-November 6, 2010, Knoxville, Tennessee, 896-899. Piscataway, New Jersey:IEEE.PNNL-SA-76511.doi:10.1109/NSSMIC.2010.5873890