Projection angle dependence in grating-based X-ray dark-field imaging of ordered structures

Bayer, Florian; Zabler, Simon; Brendel, Christian; Pelzer, Georg; Rieger, Jens; Ritter, André; Weber, Thomas; Michel, Thilo; Anton, G.

doi:10.1364/oe.21.019922

Cited by 35 publications

(35 citation statements)

References 16 publications

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“…These techniques have evolved in different ways: X-ray tensor tomography has evolved from X-ray parallel perpendicular 50 mm 50 mm dark-field imaging using a grating interferometer [164], where ultra-small X-ray scattering is exploited [165]. The intensity modulations due to the rotation of the third grating [166,167] or of the sample [168,169] reveal the 2D orientation of the ultrastructure, and have been used to retrieve 2D ultrastructure organization of bone [170] or dentin [166]. By rotating the sample around two axes, and using an iterative reconstruction algorithm, it is possible to retrieve the 3D ultrastructure orientation [161].…”

Section: X-ray Scattering/diffraction Tensor Tomographymentioning

confidence: 99%

Techniques to assess bone ultrastructure organization: orientation and arrangement of mineralized collagen fibrils

Georgiadis

Müller

Schneider

2016

J. R. Soc. Interface.

113

100

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Bone's remarkable mechanical properties are a result of its hierarchical structure. The mineralized collagen fibrils, made up of collagen fibrils and crystal platelets, are bone's building blocks at an ultrastructural level. The organization of bone's ultrastructure with respect to the orientation and arrangement of mineralized collagen fibrils has been the matter of numerous studies based on a variety of imaging techniques in the past decades. These techniques either exploit physical principles, such as polarization, diffraction or scattering to examine bone ultrastructure orientation and arrangement, or directly image the fibrils at the sub-micrometre scale. They make use of diverse probes such as visible light, X-rays and electrons at different scales, from centimetres down to nanometres. They allow imaging of bone sections or surfaces in two dimensions or investigating bone tissue truly in three dimensions, in vivo or ex vivo, and sometimes in combination with in situ mechanical experiments. The purpose of this review is to summarize and discuss this broad range of imaging techniques and the different modalities of their use, in order to discuss their advantages and limitations for the assessment of bone ultrastructure organization with respect to the orientation and arrangement of mineralized collagen fibrils.

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Section: X-ray Scattering/diffraction Tensor Tomographymentioning

confidence: 99%

Techniques to assess bone ultrastructure organization: orientation and arrangement of mineralized collagen fibrils

Georgiadis

Müller

Schneider

2016

J. R. Soc. Interface.

113

100

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“…Thus, scattering and phase shifts along the direction of the grating lines have no influence on the contrast of the Talbot pattern. The directional dependence of the dark-field image holds the capability of retrieving information about the angular variations of the local scattering power of a sample [12,14]. For that purpose, the object is rotated around the beam axis and at least three images at different angular orientations of the object are acquired.…”

Section: Directional X-ray Dark-field Imagingmentioning

confidence: 99%

“…The dark-field signal is mainly based on small angle X-ray scattering (SAXS) caused by variations in the electron density of an inhomogeneous sample [10,11]. As a further analysis tool, directional X-ray dark-field imaging is used in order to reconstruct fibre orientations of micrometer-sized aligned structures which are not resolvable directly [12][13][14]. The method is applicable for the analysis of bones [15][16][17] or the characterisation of fibre alignments in polymers [18][19][20].…”

Section: Introductionmentioning

confidence: 99%

Non-Destructive Testing of Archaeological Findings by Grating-Based X-Ray Phase-Contrast and Dark-Field Imaging

et al. 2018

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Abstract:The analysis of archaeological findings reveals the remaining secrets of human history. However, it is a challenging task to investigate and simultaneously preserve the unique remains. Available non-destructive examination methods are limited and often insufficient. Thus, we considered X-ray grating interferometry as a non-destructive and advanced X-ray imaging method to retrieve more information about archaeological findings. In addition to the conventional attenuation image, the differential phase and the dark-field image are obtained. We studied the potential of the scattering-sensitive dark-field and the phase-shift sensitive differential phase image to analyse archaeological findings. Hereby, the focus lies on organic remnants. Usually, the organic materials have vanished due to decomposition processes, but the structures are often preserved by mineralisation and penetration of corrosion products. We proved that the combination of the attenuation and the dark-field image in particular, enables a separation of structural properties for fabric remnants. Furthermore, we achieved promising results for the reconstruction of sub-pixel sized fibre orientations of woven fabric remnants by employing the directional dark-field imaging method. We conclude from our results that a further application of X-ray dark-field imaging on wet organic findings and on the distinction of different types of organic remnants at archaeological findings is promising.

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“…The dark-field image is thus an image of the granularity or fibrousness of the sample. It was shown that biological, human and inanimate objects with different microstructural properties can produce contrasts in the dark-field image [9][10][11]. This information on the microstructure of the sample, not necessarily accessible with standard radiography, is of special interest for an eventual application in medical imaging [12][13][14][15][16].…”

Section: Introductionmentioning

confidence: 99%

Energy weighted x-ray dark-field imaging

Pelzer¹,

Zang²,

Anton³

et al. 2014

Opt. Express

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Abstract:The dark-field image obtained in grating-based x-ray phasecontrast imaging can provide information about the objects' microstructures on a scale smaller than the pixel size even with low geometric magnification.In this publication we demonstrate that the dark-field image quality can be enhanced with an energy-resolving pixel detector. Energy-resolved x-ray dark-field images were acquired with a 16-energy-channel photon-counting pixel detector with a 1 mm thick CdTe sensor in a Talbot-Lau x-ray interferometer. A method for contrast-noise-ratio (CNR) enhancement is proposed and validated experimentally. In measurements, a CNR improvement by a factor of 1.14 was obtained. This is equivalent to a possible radiation dose reduction of 23%. x-ray dark-field imaging using a grating interferometer," Nat. Mater. 7, 134-137 (2008). 5. A. Momose, T. Takeda, Y. Itai, and K. Hirano, "Phasecontrast xray computed tomography for observing biological soft tissues," Nat. Med. 2(4), 473-475 (1996). 6. F. Pfeiffer, T. Weitkamp, O. Bunk, and C. David, "Phase retrieval and differential phase-contrast imaging with low-brilliance x-ray sources," Nat. Phys. 2(4), 258-261 (2006). 7. T. Weitkamp, C. David, O. Bunk, J. Bruder, P. Cloetens, and F. Pfeiffer, "X-ray phase radiography and tomography of soft tissue using grating interferometry," Eur. J. Radiol. 68(3), 13-17 (2008

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Projection angle dependence in grating-based X-ray dark-field imaging of ordered structures

Cited by 35 publications

References 16 publications

Techniques to assess bone ultrastructure organization: orientation and arrangement of mineralized collagen fibrils

Techniques to assess bone ultrastructure organization: orientation and arrangement of mineralized collagen fibrils

Non-Destructive Testing of Archaeological Findings by Grating-Based X-Ray Phase-Contrast and Dark-Field Imaging

Energy weighted x-ray dark-field imaging

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