Two-dimensional grating-based X-ray phase-contrast imaging using Fourier transform phase retrieval
2011; Optica Publishing Group; Volume: 19; Issue: 4 Linguagem: Inglês
10.1364/oe.19.003339
ISSN1094-4087
AutoresHidenosuke Itoh, Kentaro Nagai, Genta Sato, Kimiaki Yamaguchi, Takashi Nakamura, Takeshi Kondoh, Chidane Ouchi, Takayuki Teshima, Yutaka Setomoto, Toru Den,
Tópico(s)X-ray Spectroscopy and Fluorescence Analysis
ResumoWe demonstrate a single shot two-dimensional grating-based X-ray phase-contrast imaging using a synchrotron radiation source. A checkerboard designed phase grating for π phase modulation at 17 keV and 35 keV, and a lattice-shaped amplitude grating with a high aspect ratio to shield X-rays up to 35 keV were fabricated. A Fourier analysis of Moiré fringe generated by the gratings was introduced to obtain the two-dimensional differential phase-contrast image with a single exposure. The results show that soft tissues and cartilages of a chicken wing sample are clearly seen with differential phase variation in two-dimensional directions. Using this method not only the whole of an object but also only an inner part of the object can be imaged.
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