X-ray refraction-contrast computed tomography images using dark-field imaging optics

Journal Article · Mon Oct 11 04:00:00 EDT 2010 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.3497717· OSTI ID:21464521

Sunaguchi, Naoki; Yuasa, Tetsuya ^[1]; Huo, Qingkai ^[1]; Ichihara, Shu ^[2]; Ando, Masami ^[3]

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1. Graduate School of Science and Engineering, Yamagata University, Yonezawa, Yamagata 992-8510 (Japan)
2. Department of Pathology, Nagoya Medical Center, Nagoya, Aichi 460-0001 (Japan)
3. Research Institute for Science and Technology, Tokyo University of Science, Noda, Chiba 278-8510 (Japan)

If an x-ray beam containing internal information derived from sample soft tissue is incident upon a Laue-case analyzer, the beam will subsequently split into a forwardly diffracted beam and a separate diffracted beam. Using these beams acquired simultaneously, a refraction-contrast computed tomography (CT) imaging system for biomedical use with lower radiation dose can be easily realized, and has a high depicting capability on the soft tissues compared with conventional x-ray CT based on absorption contrast principles. In this paper, we propose an imaging system using dark-field imaging for CT measurement based on a tandem system of Bragg- and Laue-case crystals with two two-dimensional detectors, along with a data-processing method to extract information on refraction from the measured entangled intensities by use of rocking curve fitting with polynomial functions. Reconstructed images of soft tissues are presented and described.

• OSTI ID: 21464521
• Journal Information: Applied Physics Letters, Journal Name: Applied Physics Letters Journal Issue: 15 Vol. 97; ISSN APPLAB; ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

07 ISOTOPE AND RADIATION SOURCES
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ABSORPTION
BRAGG REFLECTION
COHERENT SCATTERING
COMPUTERIZED TOMOGRAPHY
CRYSTALS
DATA PROCESSING
DIAGNOSTIC TECHNIQUES
DIFFRACTION
DIFFRACTION METHODS
ELECTROMAGNETIC RADIATION
FUNCTIONS
IMAGE PROCESSING
IMAGES
IONIZING RADIATIONS
LAUE METHOD
OPTICS
POLYNOMIALS
PROCESSING
RADIATIONS
REFLECTION
REFRACTION
SCATTERING
SORPTION
TOMOGRAPHY
X RADIATION
X-RAY DIFFRACTION