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J Synchrotron Radiat. 2005 Jul;12(Pt 4):534-6. Epub 2005 Jun 15.

High-energy phase-contrast X-ray imaging using a two-crystal X-ray interferometer.

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  • 1Advanced Research Laboratory, Hitachi Ltd, Hatoyama, Saitama 350-0395, Japan.


To broaden the scope of phase-contrast X-ray imaging in biomedical applications, the energy of X-rays in a large-area imaging system using a two-crystal X-ray interferometer has been increased from 17.7 keV to 35 keV. The use of higher-energy X-rays makes it possible to observe larger samples having greater variation in density within shorter measurement periods, at higher spatial resolution, and at lower X-ray doses. After optimizing the imaging system for 35 keV X-rays, a 25 mm x 30 mm interference pattern with 50% visibility was generated at the Photon Factory. The system's capabilities are demonstrated by this pattern and a high-quality three-dimensional image of a rat heart.

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