title: Interferometric hard x-ray phase contrast imaging at 204 nm grating period.
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.
authors: Imaging Physic Laboratory, Biophysics and Biochemistry Center, National Heart, Lung and Blood Institute, National Institutes of Health, Bethesda, Maryland 20892, USA. wenh@nhlbi.nih.gov
authors: Han
authors: H
authors: Wen
authors: Douglas E
authors: DE
authors: Wolfe
authors: Andrew A
authors: AA
authors: Gomella
authors: Houxun
authors: H
authors: Miao
authors: Xianghui
authors: X
authors: Xiao
authors: Chian
authors: C
authors: Liu
authors: Susanna K
authors: SK
authors: Lynch
authors: Nicole
authors: N
authors: Morgan
mesh_terms: D000818:Animals; D004867:Equipment Design; D005240:Feasibility Studies; D006257:Head; D007091:Image Processing, Computer-Assisted; D007368:Interferometry; D057054:Molecular Imaging / Q000295:instrumentation*; D033621:Tephritidae; D014965:X-Rays
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