X-ray phase contrast imaging and noise evaluation using a single phase grating interferometer

Rizzi, Julien; Mercère, Pascale; Idir, Mourad; Silva, P. Da; Vincent, Grégory; Primot, Jérôme

doi:10.1364/oe.21.017340

Cited by 33 publications

(33 citation statements)

References 41 publications

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“…Similar setups have been used to measure the wavefront of synchrotron radiation [17] and to perform imaging [18,19]. In this work we emphasize optimization for high performance of the sensor on a single-shot basis with an unattenuated full FEL beam, and its applications to systematic studies of FEL beam characteristics at different locations along the beam path.…”

Section: Introductionmentioning

confidence: 99%

High-accuracy wavefront sensing for x-ray free electron lasers

Liu

Seaberg

Zhu

et al. 2018

Optica

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Systematic understanding and real-time feedback capability for x-ray free electron laser (FEL) accelerator and optical components are critical for scientific experiments and instrument performance. Single-shot wavefront sensing enables characterization of the intensity and local electric field distribution at the sample plane, something that is important for understanding scientific experiments such as nonlinear studies. It can also provide feedback for alignment and tuning of the FEL beam and instrumentation optics, leading to optimal instrument performance and greater operational efficiency. A robust, sensitive, and accurate single-shot wavefront sensor for x-ray FEL beams using single grating Talbot interferometry has been developed. Experiments performed at the Linac Coherent Light Source (LCLS) demonstrate 3σ sensitivity and accuracy, both better than λ∕100, and retrieval of hard x-ray (λ 0.13 nm, E 9.5 keV) wavefronts in 3D. Exhibiting high performance from both unfocused and focused beams, the same setup can be used to systematically study the wavefront from the FEL output, beam transport optics, and endstation focusing optics. This technique can be extended for use with softer and harder x rays with modified grating configurations.

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Section: Introductionmentioning

confidence: 99%

High-accuracy wavefront sensing for x-ray free electron lasers

Liu

Seaberg

Zhu

et al. 2018

Optica

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“…This reflects that the monochromatic fringe phase shift generated by a sample is inversely proportional to the square of photon energy, providing the photon energy is away from the absorption edges of the sample elements. Under polychromatic X-ray illumination, one may retrieve the polychromatic fringe phase shift φ m,Poly (x, y) from the fringe pattern by using either the phase stepping method or the Fourier analysis method [4,[13][14][15][16][17]. We realized that, regardless of the method used, the retrieved polychromatic fringe phase shift φ m,Poly (x, y) is given by…”

Section: Methodsmentioning

confidence: 99%

“…The reduced grating-to-detector distance R 2 /M g (with M g = 1) was set to the 1 st and 3 rd Talbot distances at the design energy. The polychromatic fringe phase shifts φ 2,Poly (x, y) was retrieved from the simulated fringe pattern by using the Fourier analysis method, as reported in [13,14,16,17]. Based on the simulated φ 2,Poly (x, y) data, we determine the monochromatic fringe shift φ Figure 4 plots the simulation results for a π-grating interferometer setup, in which the grating design energy E D was set to 18 keV and the grating-detector distance was set to the 1 st fractional Talbot distance, i.e., R 2 /M g = p 2 1 /8λ D , where λ D is the X-ray wavelength at the design energy.…”

Section: For π-Grating Interferometersmentioning

confidence: 99%

“…This is because this technique may provide highly sensitive means for imaging soft tissues and low-Z materials, hence it has many potential applications in medical imaging and material science [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15]. X-ray grating interferometry is usually implemented as a Talbot-Lau interferometer [4,[15][16][17], which consists of an X-ray source, a source grating G 0 , a phase grating G 1 and an imaging detector, as is schematically shown in Fig.…”

Section: Introductionmentioning

confidence: 99%

“…On the other hand, when the fringe is resolvable by the detector, one can apply the Fourier analysis method for phase retrieval. In this method one crops the fringe's Fourier spectrum around a diffraction peak m/M g p 1 to extract the fringe phase shifts [13,14,16,17]. Once the fringe phase shift φ m is retrieved, the gradients ∂ρ e, p /∂x of the sample's projected electron densities can be simply recovered from φ m by simply inverting Eq.…”

Section: Introductionmentioning

confidence: 99%

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Polychromatic X-ray effects on fringe phase shifts in grating interferometry

Yan

Liu

2017

Opt. Express

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Abstract:In order to quantitatively determine the projected electron densities of a sample, one needs to extract the monochromatic fringe phase shifts from the polychromatic fringe phase shifts measured in the grating interferometry with incoherent X-ray sources. In this work the authors propose a novel analytic approach that allows to directly compute the monochromatic fringe shifts from the polychromatic fringe shifts. This approach is validated with numerical simulations of several grating interferometry setups. This work provides a useful tool in quantitative imaging for biomedical and material science applications. T. Den, "Two-dimensional grating-based x-ray phase-contrast imaging using fourier transform phase retrieval," Opt. Express 19, 3339-3346 (2011). 14. J. Rizzi, P. Mercere, M. Idir, P. D. Silva, G. Vincent, and J. Primot, "X-ray phase contrast imaging and noise evaluation using a single phase grating interferometer," Opt. Express 21, 17340-17351 (2013). 15. A. Bravin, P. Coan, and P. Suortti, "X-ray phase-contrast imaging: from pre-clinical applications towards clinics,"Physics in Medicine and Biology 58, R1-R35 (2013). 16. N. Morimoto, S. Fujino, K. Ohshima, J. Harada, T. Hosoi, H. Watanabe, and T. Shimura, "X-ray phase contrast imaging by compact talbot-lau interferometer with a single transmission grating," Opt. Lett. 39, 4297-4300 (2014). 17. N. Morimoto, S. Fujino, A. Yamazaki, Y. Ito, T. Hosoi, H. Watanabe, and T. Shimura, "Two dimensional x-ray phase imaging using single grating interferometer with embedded x-ray targets," Opt. Express 23, 16582-16588 (2015).

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X-ray Single-Grating Interferometry

Zdora

2021

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

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X-ray phase contrast imaging and noise evaluation using a single phase grating interferometer

Cited by 33 publications

References 41 publications

High-accuracy wavefront sensing for x-ray free electron lasers

High-accuracy wavefront sensing for x-ray free electron lasers

Polychromatic X-ray effects on fringe phase shifts in grating interferometry

X-ray Single-Grating Interferometry

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