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Research Articles

ScienceAsia 33 (2007): 103-111 |doi: 10.2306/scienceasia1513-1874.2007.33.103

X-ray Imaging with a Wedge-shaped Crystal Analyzer

Wanwisa Pattanasiriwisawaa*, Hiroshi Sugiyamab,c, Anton Maksimenkob,c, Masami Andob,c and Takehiko Ishiia

ABSTRACT: The advantage of X-ray imaging by the use of synchrotron radiation and a wedge-shaped crystal analyzer is shown. The experiments have been carried out using synchrotron radiation from a 5T superconducting wiggler in a 2.5 GeV storage ring. Striped image patterns characteristic of a wedge-shaped crystal analyzer are clearly observed. Results on breast cancer phantoms and an ant show images with good contrasts revealing the interiors of the samples in case of dark field images, which are not seen in bright field images. The physical process of the generation of a dark field image is simply explained. The obtained results present the experimental evidence for the basic assumption made in the explanation of the dark field imaging.

KEYWORDS: X-ray imaging, Breast phantom, Synchrotron radiation, X-ray dynamical diffraction, Medical Application.

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a National Synchrotron Research Center (NSRC), 111 University Avenue, Muang District, Nakhon Ratchasima 30000, Thailand.
b Photon Factory, Institute of Material Structure Science, KEK, 1-1 Oho, Tsukuba, Ibaraki 305-0801, Japan.
c Department of Photo-Science, School of Advanced Studies, Graduate University for Advanced Studies, 1-1 Oho, Tsukuba, Ibaraki 305-0801, Japan.

* Corresponding author, E-mail: wanwisa@nsrc.or.th

Received 27 Dec 2004, Accepted 8 Nov 2006