title: Quantitative Mass Density Image Reconstructed from the Complex X-Ray Refractive Index.
abstract: We demonstrate a new analytical X-ray computed tomography technique for visualizing and quantifying the mass density of materials comprised of low atomic number elements with unknown atomic ratios. The mass density was obtained from the experimentally observed ratio of the imaginary and real parts of the complex X-ray refractive index. An empirical linear relationship between the X-ray mass attenuation coefficient of the materials and X-ray energy was found for X-ray energies between 8 keV and 30 keV. The mass density image of two polymer fibers was quantified using the proposed technique using a scanning-type X-ray microbeam computed tomography system equipped with a wedge absorber. The reconstructed mass density agrees well with the calculated one.
authors.affiliation: Nanomaterials R&D Center, Canon Inc., Ohta-ku, Tokyo, Japan.
authors.forename: Taihei
authors.initials: T
authors.lastname: Mukaide
authors.affiliation: Photon Factory, Institute of Materials Structure Science, High Energy Accelerator Research Organization, Tsukuba, Ibaraki, Japan.
authors.forename: Atsuo
authors.initials: A
authors.lastname: Iida
authors.affiliation: Nanomaterials R&D Center, Canon Inc., Ohta-ku, Tokyo, Japan.
authors.forename: Masatoshi
authors.initials: M
authors.lastname: Watanabe
authors.affiliation: Nanomaterials R&D Center, Canon Inc., Ohta-ku, Tokyo, Japan.
authors.forename: Kazuhiro
authors.initials: K
authors.lastname: Takada
authors.affiliation: Nanomaterials R&D Center, Canon Inc., Ohta-ku, Tokyo, Japan.
authors.forename: Takashi
authors.initials: T
authors.lastname: Noma
mesh_terms: D008962:Models, Theoretical; D014057:Tomography, X-Ray Computed / Q000379:methods*