title: Elemental Contrast X-ray Tomography Using Ross Filter Pairs with a Polychromatic Laboratory Source.
abstract: The majority of current laboratory based X-ray sources are polychromatic and are not tuneable. This lack of monochromaticity limits the range of applications for these sources and in particular it reduces the elemental specificity of laboratory based X-ray imaging experiments. Here we present a solution to this problem based on the use of Ross filter pairs. Although such Ross filter arrangements have been applied in proof-of-principle spectroscopy experiments, to date there have been no reports of this approach used for full-field X-ray imaging. Here we report on the experimental demonstration of Ross filter pairs being used for quasi-monochromatic, full-field imaging. This arrangement has several important benefits for laboratory based X-ray imaging including, as we demonstrate, elemental contrast enhancement. The method is demonstrated both for two-dimensional radiography and for three-dimensional X-ray tomography.
authors.affiliation: ARC Centre of Excellence in Advanced Molecular Imaging, Department of Chemistry and Physics, La Trobe University, Victoria, 3086, Australia. B.Arhatari@latrobe.edu.au.
authors.forename: Benedicta D
authors.identifier: 0000-0003-2816-0498
authors.initials: BD
authors.lastname: Arhatari
authors.affiliation: ARC Centre of Excellence in Advanced Molecular Imaging, School of Physics, The University of Melbourne, Parkville, VIC, 3010, Australia.
authors.forename: Timur E
authors.initials: TE
authors.lastname: Gureyev
authors.affiliation: ARC Centre of Excellence in Advanced Molecular Imaging, Department of Chemistry and Physics, La Trobe University, Victoria, 3086, Australia.
authors.forename: Brian
authors.identifier: 0000-0001-6504-0503
authors.initials: B
authors.lastname: Abbey