X-ray imaging apparatus, X-ray imaging method, and X-ray imaging program
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United States of America Patent
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Dec 25, 2012
Grant Date -
Nov 17, 2011
app pub date -
Jul 26, 2011
filing date -
Oct 29, 2008
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Abstract
An X-ray imaging apparatus includes a phase grating, an absorption grating, a detector, and an arithmetic unit. The arithmetic unit executes a Fourier transform step of performing Fourier transform for an intensity distribution of a Moiré acquired by the detector, and acquiring a spatial frequency spectrum. Also, the arithmetic unit executes a phase retrieval step of separating a spectrum corresponding to a carrier frequency from a spatial frequency spectrum acquired in the Fourier transform step, performing inverse Fourier transform for the separated spectrum, and acquiring a differential phase image.
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