X-ray dark-field imaging with a single absorption grating

Yang, Jun; Zong, Fangke; Lei, Yaohu; Huang, Jianheng; Liu, Jinyuan; Guo, Jr-Hung

doi:10.1088/1361-6463/ab0807

Cited by 6 publications

(5 citation statements)

References 24 publications

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“…The single absorption grating imaging experiment 7,42) is performed using the device described above. The schematic diagram of the experimental device is shown in Fig.…”

Section: Resultsmentioning

confidence: 99%

“…If the phase change can be detected and a clear phase-contrast image can be obtained, then the nature of the object would be revealed. 7,8) In 2003, A. Momose proposed X-ray Talbot Interferometer method. [9][10][11][12][13][14][15][16][17][18][19][20][21][22][23][24][25] Grating-based X-ray phase-contrast imaging technology can overcome the disadvantage of absorption imaging, and provides higher contrast imaging for objects composed of light elements.…”

Section: Introductionmentioning

confidence: 99%

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Fabrication of X-ray absorption grating by thermal composite method

Wu¹,

Yang²,

Zong³

et al. 2021

Jpn. J. Appl. Phys.

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In this paper, we propose a new method to prepare X-ray absorption gratings. The thermal composite absorption gratings with periods of 80 μm and 140 μm are successfully fabricated by using the difference in X-ray absorption between aluminum and silver film. The production process and the use of equipment are simple and easy to implement. A number of absorption gratings can be produced in one production, which greatly reduces the cost of gratings. Finally, the X-ray single absorption grating imaging experiment is used to verify the effectiveness of the thermal composite absorption grating.

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“…The single absorption grating imaging experiment 7,42) is performed using the device described above. The schematic diagram of the experimental device is shown in Fig.…”

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Fabrication of X-ray absorption grating by thermal composite method

Wu¹,

Yang²,

Zong³

et al. 2021

Jpn. J. Appl. Phys.

Self Cite

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“…In the last years, the single-grating approach has seen increasing interest and a number of setups have been reported in the literature using either a single phase or absorption grating to create an interference pattern combined with a phase-stepping scan Balles et al, 2016;Schulz et al, 2017b;Balles et al, 2018;Yang et al, 2019]. Experimental implementations of single-shot single-grating measurements for high-speed imaging have been proposed using 1D and 2D…”

Section: Grating Interferometry Without Absorption Grating G2mentioning

confidence: 99%

X-ray Phase-Contrast Imaging Using Near-Field Speckles

Zdora¹

2021

Springer Theses

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In the last decades, X-ray phase-contrast imaging has proven to be a powerful method for unveiling the inner structure of samples and is capable of visualising even minute density differences. Recently, speckle-based imaging (SBI), the youngest X-ray phase-sensitive technique, has received great interest due to its high sensitivity, quantitative character and relaxed requirements on the setup components and beam properties. This thesis is focussed on the development, experimental optimisation and applications of SBI, with the aim of simplifying its implementation, increasing its flexibility and expanding its potential.For this, a robust, flexible data acquisition and reconstruction approach, the unified modulated pattern analysis (UMPA), was developed, which lifts previous constraints of SBI. UMPA allows for tuning of the sensitivity and spatial resolution by adjusting the scan and reconstruction parameters. It is applicable not only to random speckle, but also periodic interference patterns, bridging the gap and improving the performance of both speckle-and single-grating-based techniques.Following the first demonstration of UMPA, its potential for a range of applications is illustrated in this thesis. It is shown that UMPA can be employed for X-ray optics characterisation to quantify aberrations in the focussing behaviour of X-ray refractive lenses with high precision and accuracy. UMPA phase tomography is applied to the field of biomedical imaging for high-sensitivity three-dimensional (3D) virtual histology of unstained, hydrated soft tissue, giving unprecedented structural and quantitative density information.Further developments of SBI explored in this thesis include the testing of novel customisable speckle diffusers, the extension of SBI to higher X-ray energies for geology and materials science applications, and the demonstration of UMPA at a laboratory X-ray source. These progresses promise new possibilities of SBI for high-sensitivity, robust and high-throughput imaging in previously inaccessible fields and make SBI accessible to a wider range of users in research and industry.

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“…X-ray phase-contrast images and dark-field images obtained by a Talbot-Lau interferometer have potential applications in diagnosis of rheumatoid arthritis, microcalcifications in breast and lung diseases. [1][2][3][4][5][6][7][8][9][10][11][12][13][14] However, the Talbot-Lau interferometer is restricted by the small field of view in clinic applications. It is a great challenge to fabricate the analyzer grating over a large area and high aspect ratio.…”

Section: Introductionmentioning

confidence: 99%

Analysis of period and visibility of dual phase grating interferometer

Yang¹,

Huang²,

Lei³

et al. 2022

Chinese Phys. B

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Dual phase grating interferometer may simultaneously achieve large field of view and high X-ray dose efficiency. In this paper, we developed a simple theoretical method to better understand the imaging process of the dual phase grating interferometer. The derivation process of fringe period and the optimal visibility conditions of the dual phase grating interferometer were shown in detail. Then, we theoretically proved that the fringe period and optimal visibility conditions of the dual phase grating interferometer included that of the Talbot interferometer. By comparing our experimental results with those of other researchers, we found that when the positions of phase gratings were far away from the positions where the fringe visibility was optimal, the fringe period of the dual π-phase grating interferometer was twice longer than the theoretical results under the illumination of polychromatic X-ray. And this conclusion may explain the contradictory research results of dual phase grating interferometer among different researchers.

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X-ray dark-field imaging with a single absorption grating

Cited by 6 publications

References 24 publications

Fabrication of X-ray absorption grating by thermal composite method

Fabrication of X-ray absorption grating by thermal composite method

X-ray Phase-Contrast Imaging Using Near-Field Speckles

Analysis of period and visibility of dual phase grating interferometer

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