X-ray phase-contrast imaging
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United States of America Patent
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Oct 31, 2017
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May 19, 2016
app pub date -
Nov 17, 2015
filing date -
Nov 17, 2014
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Abstract
Systems and methods for X-ray phase-contrast imaging (PCI) are provided. A quasi-periodic phase grating can be positioned between an object being imaged and a detector. An analyzer grating can be disposed between the phase grating and the detector. Second-order approximation models for X-ray phase retrieval using paraxial Fresnel-Kirchhoff diffraction theory are also provided. An iterative method can be used to reconstruct a phase-contrast image or a dark-field image.
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