Demonstration of X-Ray Talbot Interferometry

Momose, Atsushi; Kawamoto, Shinya; Koyama, Ichiro; Hamaishi, Yoshitaka; Takai, Kengo; Suzuki, Yoshio

doi:10.1143/jjap.42.l866

Cited by 913 publications

(729 citation statements)

References 2 publications

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“…Figure 1 shows a schematic of a typical grating interferometer and its geometric parameters. It can be distinguished between two types of interferometers, the Talbot-type interferometer [1,2], which uses two gratings (G1 and G2), and the Talbot-Lau-type interferometer [4], which uses an additional grating (G0). The beam splitter grating, or G1, is a phase grating which generates a periodic interference pattern of period p 2 with maximum intensity oscillations at the distances d = d m , which are given by [16] Figure 1.…”

Section: Introductionmentioning

confidence: 99%

Performance and optimization of X-ray grating interferometry

Thuering

Stampanoni

2014

Phil. Trans. R. Soc. A.

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The monochromatic and polychromatic performance of a grating interferometer is theoretically analysed. The smallest detectable refraction angle is used as a metric for the efficiency in acquiring a differential phase-contrast image. Analytical formulae for the visibility and the smallest detectable refraction angle are derived for Talbot-type and Talbot-Lau-type interferometers, respectively, providing a framework for the optimization of the geometry. The polychromatic performance of a grating interferometer is investigated analytically by calculating the energydependent interference fringe visibility, the spectral acceptance and the polychromatic interference fringe visibility. The optimization of grating interferometry is a crucial step for the design of application-specific systems with maximum performance.

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Section: Introductionmentioning

confidence: 99%

Performance and optimization of X-ray grating interferometry

Thuering

Stampanoni

2014

Phil. Trans. R. Soc. A.

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“…This can offer a promising alternative to conventional, attenuation-based x-ray imaging for the visualization of weakly attenuating specimens, due to the fact that phase effects are often stronger in this case 1 . To date, several XPCi modalities have been developed [2][3][4][5][6][7] . The edge illumination (EI) method stands out due to its high phase sensitivity and versatility [8][9][10] .…”

Section: Introductionmentioning

confidence: 99%

A continuous sampling scheme for edge illumination x-ray phase contrast imaging

Hagen

Coan

Bravin

et al. 2015

Journal of Applied Physics

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We discuss an alternative acquisition scheme for edge illumination (EI) x-ray phase contrast imaging (XPCi) based on a continuous scan of the object, and compare its performance to that of a previously used scheme, which involved scanning the object in discrete steps rather than continuously. By simulating signals for both continuous and discrete methods under realistic experimental conditions, the effect of the spatial sampling rate is analysed with respect to metrics such as image contrast and accuracy of the retrieved phase shift. Experimental results confirm the theoretical predictions.Despite being limited to a specific example, the results indicate that continuous schemes present advantageous features compared to discrete ones. Not only can they be used to speed up the acquisition, but they also prove superior in terms of accurate phase retrieval. The theory and experimental results provided in this study will guide the design of future EI experiments through the implementation of optimized acquisition schemes and sampling rates.

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“…This problem poses restriction on the application of phase contrast imaging using the X-ray crystal interferometer to various biological samples. On the other hand, X-ray Talbot grating interferometer which has been developed by Momose et al [4] has some advantages compared to the Bonse-Hart crystal interferometer. The X-ray Talbot interferometer depends on the Talbot effect of the grating, and the moiré fringes generated by two transmission gratings are detected.…”

Section: Introductionmentioning

confidence: 99%

Investigation of Imaging Properties of Mouse Eyes Using X-ray Phase Contrast Tomography

Hoshino¹,

Uesugi²,

Yagi³

et al. 2010

AIP Conference Proceedings

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Abstract. The structure of a whole eye of mouse was studied with an X-ray Talbot grating interferometer. The distribution of crystallin concentration in the lens was quantitatively measured by X-ray phase contrast tomography. A new technique to measure the crystallin concentration in the lens is proposed. By using the proposed method, the gradient of crystallin concentration in the lens was estimated. A ray-trace of a mouse whole eye was performed with the refractive indices derived from the crystallin concentration.

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Demonstration of X-Ray Talbot Interferometry

Cited by 913 publications

References 2 publications

Performance and optimization of X-ray grating interferometry

Performance and optimization of X-ray grating interferometry

A continuous sampling scheme for edge illumination x-ray phase contrast imaging

Investigation of Imaging Properties of Mouse Eyes Using X-ray Phase Contrast Tomography

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