X-ray phase-sensitive imaging using a bilens interferometer based on refractive optics

Zverev, D.; Kohn, V. G.; Кузнецов, С. П.; Yunkin, V.; Snigirev, A.

doi:10.1364/oe.389940

Cited by 15 publications

(4 citation statements)

References 26 publications

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“…2 Most of the investigations in X-ray biprism applications are using hard X-rays generated in synchrotrons. 3,[18][19][20][21] However, it has also found application to illustrate the wave-particle behavior in the singlephoton regime. 22,23 Bi-prisms have also been used in interference electron microscopy.…”

Section: Applications Of Bi-prism Interferometrymentioning

confidence: 99%

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X‐ray bi‐prism interferometry—A design study of proposed novel hardware

et al. 2021

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Purpose: Advances in X-ray phase-contrast imaging can obtain excellent soft-tissue contrast of phase-shift, attenuation, and small angle scatter. Here we present fringe patterns for different design parameters of Xray bi-prism interferometry imaging systems. Our aim is to develop bi-prism interferometry imaging systems with excellent polychromatic performance that produce high-contrast fringes with spatially incoherent X-ray illumination. We also introduce a novel X-ray tube design that uses temporal multiplexing to provide simultaneous virtual "electronic phase stepping" that replace "mechanical phase stepping" popular with grating-based interferometry setups. Methods:In our investigation we develop expressions for the irradiance distribution pattern of a bi-prism interferometer comprised of multiple point sources and multiple bi-prisms. These expressions are used to plot fringe patterns for X-ray design parameters including size of point source, number of point sources, and point source separation; and bi-prism design parameters including material, angle, number of biprisms, period, and bi-prism array to X-ray source and to detector distances. Results:Results show that the fringe patterns for a bi-prism interferometry system are not longitudinally periodic as with grating interferometers that produce a Talbot-Lau carpet. It is also shown that at 59 keV Xrays the bi-prism material should be something comparable to nickel to obtain reasonable fringe visibility. Conclusion:The irradiance distribution pattern demonstrates that bi-prism interferometry may provide comparable or improved fringe visibility to that of gratings. Special care is given to present our findings within the context of previous advancements. A single-shot image acquisition approach using a temporal multiplexed, high-power X-ray source provides virtual electronic phase stepping without focal spot sweeping. This provides multiple images, each at the same exposure and the same projection view, from different fringe locations that allow one to derive the attenuation, phase, and dark-field images of the sample without mechanical phase stepping of a grating.

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Section: Applications Of Bi-prism Interferometrymentioning

confidence: 99%

“…Bi‐prisms have had many applications in the optical regime 2 . Most of the investigations in X‐ray bi‐prism applications are using hard X‐rays generated in synchrotrons 3,18–21 . However, it has also found application to illustrate the wave–particle behavior in the single‐photon regime 22,23 .…”

Section: Introductionmentioning

confidence: 99%

X‐ray bi‐prism interferometry—A design study of proposed novel hardware

et al. 2021

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“…These interferometers use either the classical two-slit setup (pinholes) or two virtual sources (Leitenberger et al, 2001(Leitenberger et al, , 2004Yamazaki & Ishikawa, 2003;Leitenberger & Pietsch, 2007;Tsuji et al, 2009;Isakovic et al, 2010). Compound refractive lens (CRL) arrays for forming two or more interfering sources have also been used (Snigirev et al, 2009(Snigirev et al, , 2014Zverev et al, 2020). One of the difficulties with X-rays is the necessity for sufficiently large distances for overlapping the interfering beams.…”

Section: Introductionmentioning

confidence: 99%

Double-slit X-ray dynamical diffraction in curved crystals

Balyan

2023

Acta Cryst Sect A

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The theoretical investigation of double-slit X-ray dynamical diffraction in curved crystals shows that Young's interference fringes are formed. An expression for the period of the fringes has been established which is polarization sensitive. The position of the fringes in the cross section of the beam depends on the deviation from the Bragg exact orientation for a perfect crystal, on the curvature radius and on the thickness of the crystal. This type of diffraction can be used for determination of the curvature radius by measuring the shift of the fringes from the centre of the beam.

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“…2 Most of the investigations in X-ray biprism applications have used hard X-rays generated in synchrotrons. 3,[14][15][16][17] However, the use of biprisms has also found application to illustrate the wave-particle behaviour in the single-photon regime 18,19 and biprisms have also been used in interference electron microscopy. 20 Until 2003, 7 only Moiré fringe analysis produced by grating interferometry were used for extracting the properties of X-rays before mechanical phase stepping techniques.…”

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confidence: 99%

Tomography of dark‐field scatter including single‐exposure Moiré fringe analysis with X‐ray biprism interferometry—A simulation study

et al. 2021

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In this work we present tomographic simulations of a new hardware concept for X-ray phasecontrast interferometry wherein the phase gratings are replaced with an array of Fresnel bi-prisms, and Moiré fringe analysis is used instead of "phase stepping" popular with grating-based setups.Methods: Projections of a phantom consisting of four layers of parallel carbon microfibers is simulated using wave optics representation of X-ray electromagnetic waves. Simulated projections of a phantom with preferential scatter perpendicular to the direction of the fibers are performed to analyze the extraction of small angle scatter from dark field projections for: 1) bi-prism interferometry using Moiré fringe analysis;2) grating interferometry using phase stepping with 8 grating steps; and 3) grating interferometry using Moiré fringe analysis. Dark field projections are modeled as projections of voxel intensities represented by a fixed finite vector basis set of scattering directions. From the simulated projection data, an iterative MLEM algorithm reconstructs the coefficients of a fixed set of seven basis vectors at each voxel representing the small angle scatter distribution.Results: Results of reconstructed vector coefficients are shown comparing the three simulated imaging models. The single-exposure Moiré fringe analysis shows increase in noise because of 1/8th the number of projection samples but also is obtained with less dose and faster acquisition times. Furthermore, replacing grating interferometry with bi-prism interferometry provides better CNR. Conclusion:The simulations demonstrate the feasibility of the reconstruction of dark-field data acquired with a bi-prism interferometry system. With the potential of higher fringe visibility, bi-prism interferometry with Moiré fringe analysis might provide equal or better image quality to that of phase stepping methods with less imaging time and lower dose.

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X-ray phase-sensitive imaging using a bilens interferometer based on refractive optics

Cited by 15 publications

References 26 publications

X‐ray bi‐prism interferometry—A design study of proposed novel hardware

X‐ray bi‐prism interferometry—A design study of proposed novel hardware

Double-slit X-ray dynamical diffraction in curved crystals

Tomography of dark‐field scatter including single‐exposure Moiré fringe analysis with X‐ray biprism interferometry—A simulation study

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