title: [Refraction-contrast bone imaging using synchrotron radiation].
abstract: The X-ray refraction-contrast imaging using synchrotron radiation with some X-ray energies is successfully performed at B120B2 of SPring-8. The refraction-contrast images of bone samples such as human dried proximal phalanx, wrist, upper cervical vertebrae and sella turcica, and as mouse proximal femur, using the synchrotron X-ray are always better in image contrast and resolution than those of the absorption-contrast images using the synchrotron X-ray and/or the conventional X-ray tube. There is much likeness in the image contrast and resolution of trabeculae bone in the human dried proximal phalanx between X-ray energy of 30 keV at sample-to-film distance of 1m and those of 40, 50 keV at those of 4,5m, respectively. High-energy refraction-constrast imaging with suitable sample-to-film distance could reduce the exposure dose in human imaging. In the refraction-contrast imaging of human wrist, upper cervical vertebrae, sella turcica and mouse proximal femur using the synchrotoron X-ray, we can obtain better image contrast and resolution to correctly extract morphological information for diagnosis corresponding to each of the clinical field than those of the absorption-contrast images.
authors.affiliation: Department of Radiological Sciences, Ibaraki Prefectural University of Health Sciences, Japan. mori@ipu.ac.jp
authors.forename: Koich
authors.initials: K
authors.lastname: Mori
authors.forename: Norio
authors.initials: N
authors.lastname: Sekine
authors.forename: Hitoshi
authors.initials: H
authors.lastname: Sato
authors.forename: Naoto
authors.initials: N
authors.lastname: Shikano
authors.forename: Daisuke
authors.initials: D
authors.lastname: Shimao
authors.forename: Hideaki
authors.initials: H
authors.lastname: Shiwaku
authors.forename: Kazuyuki
authors.initials: K
authors.lastname: Hyodo
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Oka
mesh_terms: D000818:Animals; D001842:Bone and Bones / Q000000981:diagnostic imaging*; D006801:Humans; D051379:Mice; D011856:Radiographic Image Enhancement / Q000379:methods*; D017356:Synchrotrons