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Interferometric hard x-ray phase contrast imaging at 204 nm grating period. | LitMetric

Interferometric hard x-ray phase contrast imaging at 204 nm grating period.

Rev Sci Instrum

Imaging Physic Laboratory, Biophysics and Biochemistry Center, National Heart, Lung and Blood Institute, National Institutes of Health, Bethesda, Maryland 20892, USA.

Published: January 2013

AI Article Synopsis

Article Abstract

We report on hard x-ray phase contrast imaging experiments using a grating interferometer of approximately 1/10th the grating period achieved in previous studies. We designed the gratings as a staircase array of multilayer stacks which are fabricated in a single thin film deposition process. We performed the experiments at 19 keV x-ray energy and 0.8 μm pixel resolution. The small grating period resulted in clear separation of different diffraction orders and multiple images on the detector. A slitted beam was used to remove overlap of the images from the different diffraction orders. The phase contrast images showed detailed features as small as 10 μm, and demonstrated the feasibility of high resolution x-ray phase contrast imaging with nanometer scale gratings.

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Source
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3574100PMC
http://dx.doi.org/10.1063/1.4788910DOI Listing

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