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X-ray phase imaging with a grating interferometer
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DOI：10.1364/OPEX.13.006296.png)
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摘要
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Using a high-efficiency grating interferometer for hard X rays ( 10 - 30 keV) and a phase-stepping technique, separate radiographs of the phase and absorption profiles of bulk samples can be obtained from a single set of measurements. Tomographic reconstruction yields quantitative three-dimensional maps of the X-ray refractive index, with a spatial resolution down to a few microns. The method is mechanically robust, requires little spatial coherence and monochromaticity, and can be scaled up to large fields of view, with a detector of correspondingly moderate spatial resolution. These are important prerequisites for use with laboratory X-ray sources. (C) 2005 Optical Society of America.
Keyword:
SYNCHROTRON-RADIATION
CONTRAST
TOMOGRAPHY
