title: First application of X-ray refraction-based computed tomography to a biomedical object.
abstract: We have developed X-ray refraction-based computed tomography (CT) that is able to visualize soft tissue in between hard tissue. The experimental system consists of Si(220) diffraction double-crystals and is called the DEI (diffraction-enhanced imaging) method, in which the object is located between the crystals and a CCD camera to acquire data as 360 X-ray images. The X-ray energy used was 17.5 keV. The algorithm used to reconstruct CT images was developed by A. Maksimenko and colleagues. We successfully visualized articular cartilage and the distribution of bone marrow, which are inner structures. Our method has much higher contrast compared to the conventional absorption-based CT system.
authors.affiliation: Department of Photon-Science, School of Advanced Studies, Graduate University for Advanced Studies, Hayama, Kanagawa, Japan. ehashi@post.kek.jp
authors.forename: Eiko
authors.initials: E
authors.lastname: Hashimoto
authors.forename: Anton
authors.initials: A
authors.lastname: Maksimenko
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Sugiyama
authors.forename: Kazuyuki
authors.initials: K
authors.lastname: Hyodo
authors.forename: Daisuke
authors.initials: D
authors.lastname: Shimao
authors.forename: Yoshinori
authors.initials: Y
authors.lastname: Nishino
authors.forename: Tetsuya
authors.initials: T
authors.lastname: Ishikawa
authors.forename: Masami
authors.initials: M
authors.lastname: Ando
mesh_terms: D000465:Algorithms; D000818:Animals; D001853:Bone Marrow / Q000000981:diagnostic imaging*; D001842:Bone and Bones / Q000000981:diagnostic imaging*; D002358:Cartilage, Articular / Q000000981:diagnostic imaging*; D005552:Forelimb / Q000000981:diagnostic imaging; D021621:Imaging, Three-Dimensional / Q000379:methods*; D051379:Mice; D014057:Tomography, X-Ray Computed / Q000379:methods*; D014961:X-Ray Diffraction