Two-Dimensional X-Ray Grating Interferometer

Zanette, Irène; Weitkamp, Timm; Donath, Tilman; Rutishauser, Simon; Dávid, Christian

doi:10.1103/physrevlett.105.248102

Cited by 131 publications

(105 citation statements)

References 16 publications

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“…These predictions could be verified in a recent experiment on ID19 [30]. A 2D interferometer can be especially useful when projection radiography without tomographic reconstruction is used, for fast imaging (including fast tomography) in moiré mode [31], and for wavefront sensing at highly brilliant synchrotron or X-ray free-electron laser (XFEL) sources.…”

Section: Two-dimensional Interferometermentioning

confidence: 68%

X-ray Grating Interferometry at ESRF: Applications and Recent Technical Developments

Weitkamp¹,

Zanette²,

Schulz³

et al. 2011

AIP Conference Proceedings

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Section: Two-dimensional Interferometermentioning

confidence: 68%

X-ray Grating Interferometry at ESRF: Applications and Recent Technical Developments

Weitkamp¹,

Zanette²,

Schulz³

et al. 2011

AIP Conference Proceedings

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“…In our experiments we employed a one-dimensional grating set-up. However, 2-D grating interferometers [21] will also work with this instrumentation.…”

Section: Instrumentation and Experimentsmentioning

confidence: 99%

Phase contrast laminography based on Talbot interferometry

Altapova¹,

Helfen²,

Myagotin³

et al. 2012

Opt. Express

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Abstract:Synchrotron laminography is combined with Talbot grating interferometry to address weakly absorbing specimens. Integrating both methods into one set-up provides a powerful x-ray diagnostical technique for multiple contrast screening of macroscopically large flat specimen and a subsequent non-destructive three-dimensional (3-D) inspection of regions of interest. The technique simultaneously yields the reconstruction of the 3-D absorption, phase, and the so-called dark-field contrast maps. We report on the theoretical and instrumental implementation of of this novel technique. Its broad application potential is exemplarily demonstrated for the field of cultural heritage, namely study of the historical Dead Sea parchment.

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“…One is to rotate the sample or the entire interferometer around the optical axis [10], though this requires an additional axis of rotation and is therefore hardly compatible with gantry systems in medical tomography scanners. The other possibility is to use two-dimensional grating structures [11], which suffers from slow data acquisition as it requires phase stepping in two dimensions or, when used in single-shot mode, only provides reduced spatial resolution [12,13].…”

Section: Introductionmentioning

confidence: 99%

A tilted grating interferometer for full vector field differential x-ray phase contrast tomography

et al. 2011

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We report on a setup for differential x-ray phase-contrast imaging and tomography, that measures the full 2D phase-gradient information. The setup uses a simple one-dimensional x-ray grating interferometer, in which the grating structures of the interferometer are oriented at a tilt angle with respect to the sample rotation axis. In such a configuration, the differential phase images from opposing tomography projections can be combined to yield both components of the gradient vector. We show how the refractive index distribution as well as its x, y, and z gradient components can be reconstructed directly from the recorded projection data. The method can equally well be applied at conventional x-ray tube sources, to analyzer based x-ray imaging or neutron imaging. It is demonstrated with measurements of an x-ray phantom and a rat brain using synchrotron radiation. Abstract:We report on a setup for differential x-ray phase-contrast imaging and tomography, that measures the full 2D phase-gradient information.The setup uses a simple one-dimensional x-ray grating interferometer, in which the grating structures of the interferometer are oriented at a tilt angle with respect to the sample rotation axis. In such a configuration, the differential phase images from opposing tomography projections can be combined to yield both components of the gradient vector. We show how the refractive index distribution as well as its x, y, and z gradient components can be reconstructed directly from the recorded projection data. The method can equally well be applied at conventional x-ray tube sources, to analyzer based x-ray imaging or neutron imaging. It is demonstrated with measurements of an x-ray phantom and a rat brain using synchrotron radiation. Pai, "Single-shot x-ray differential phase-contrast and diffraction imaging using two-dimensional transmission gratings," Opt. Lett. 35, 1932Lett. 35, -1934Lett. 35, (2010. 13. H. Itoh, K. Nagai, G. Sato, K. Yamaguchi, T. Nakamura, T. Kondoh, C. Ouchi, T. Teshima, Y. Setomoto, and T. Den, "Two-dimensional grating-based X-ray phase-contrast imaging using Fourier transform phase retrieval," Opt. , 189-195 (2007). 21. The out-of-plane component cancels out because the phase integration, which is implicit in the modified reconstruction kernel, is always performed along the same direction in the camera coordinate system. Considering for instance an integral from left to right through the PMMA cylinder at the bottom of Fig. 2(d), the signal at its left edge is ∂ t Φ + ∂ z Φ where the signal in the tomographic rotation plane is ∂ t Φ > 0 and the out-of-plane signal ∂ z Φ < 0. Integrating through the same edge of the sample in Fig. 2(e), the out-of-plane signal has changed sign ∂ z Φ > 0, while the in-plane signal has again the same sign as before ∂ t Φ > 0. Reconstructing a slice using filtered back projection over a full sample rotation of 2π, each projection pair corresponds to a single line in twodimensional Fourier space. The out of plane component cancels out since it is o...

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Two-Dimensional X-Ray Grating Interferometer

Cited by 131 publications

References 16 publications

X-ray Grating Interferometry at ESRF: Applications and Recent Technical Developments

X-ray Grating Interferometry at ESRF: Applications and Recent Technical Developments

Phase contrast laminography based on Talbot interferometry

A tilted grating interferometer for full vector field differential x-ray phase contrast tomography

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