Gain in spatial resolution of X-ray laboratory microtomographs with enlarging X-ray optical elements

Сенин, Р. А.; Бузмаков, А. В.; Konovko, A V; Смирнов, И. С.; Geranin, A. S.; Асадчиков, В. Е.

doi:10.1088/1742-6596/186/1/012035

Cited by 4 publications

(4 citation statements)

References 4 publications

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“…To illuminate the Z-dependence of linear attenuation, the measurements were carried out with a parallel scanning scheme at different energies of 5.4, 8 and 10 keV. An advanced tomography system based on a diffractometer constructed at the IC RAS (Senin et al, 2009) was used for 5.4 and 8 keV measurements to extract the contrast from sets of different elements. Senin et al (2009) gave a detailed description of the experimental arrangement for laboratory tomography measurements.…”

Section: Apparatusmentioning

confidence: 99%

“…An advanced tomography system based on a diffractometer constructed at the IC RAS (Senin et al, 2009) was used for 5.4 and 8 keV measurements to extract the contrast from sets of different elements. Senin et al (2009) gave a detailed description of the experimental arrangement for laboratory tomography measurements. The setup is illustrated schematically in Fig.…”

Section: Apparatusmentioning

confidence: 99%

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Monochromatic computed microtomography using laboratory and synchrotron sources and X-ray fluorescence analysis for comprehensive analysis of structural changes in bones

et al. 2015

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A combination of X-ray tomography at different wavelengths and X-ray fluorescence analysis was applied in the study of two types of bone tissue changes: prolonged presence in microgravity conditions and age-related bone growth. The proximal tail vertebrae of geckos were selected for investigation because they do not bear the supporting load in locomotion, which allows them to be considered as an independent indicator of gravitational influence. For the vertebrae of geckos no significant differences were revealed in the elemental composition of the flight samples and the synchronous control samples. In addition, the gecko bone tissue samples from the jaw apparatus, spine and shoulder girdle were measured. The dynamics of structural changes in the bone tissue growth was studied using samples of a human fetal hand. The hands of human fetuses of 11-15 weeks were studied. Autonomous zones of calcium accumulation were found not only in individual fingers but in each of the investigated phalanges. The results obtained are discussed.

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Section: Apparatusmentioning

confidence: 99%

Section: Apparatusmentioning

confidence: 99%

Monochromatic computed microtomography using laboratory and synchrotron sources and X-ray fluorescence analysis for comprehensive analysis of structural changes in bones

et al. 2015

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“…The specimen of interest is placed before the BMM and the beam containing the information about the sample is then magnified by means of extreme asymmetric diffraction by dislocation free germanium crystals. X-ray magnification using this concept was initially demonstrated using asymmetric silicon crystals [2][3][4][5][6][7][8]. More recently, the use of dislocation-free germanium crystals was demonstrated to be more efficiently due to the larger structure factor of germanium compared to silicon [9].…”

Section: Introductionmentioning

confidence: 99%

X-ray Bragg magnifier microscope as a linear shift invariant imaging system: image formation and phase retrieval

Vagovič¹,

Sveda²,

Cecilia³

et al. 2014

Opt. Express

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We present the theoretical description of the image formation with the in-line germanium Bragg Magnifier Microscope (BMM) and the first successful phase retrieval of X-ray holograms recorded with this imaging system. The conditions under which the BMM acts as a linear shift invariant system are theoretically explained and supported by the experiment. Such an approach simplifies the mathematical treatment of the image formation and reconstruction as complicated propagation of the wavefront onto inclined planes can be avoided. Quantitative phase retrieval is demonstrated using a test sample and a proof of concept phase imaging of a spider leg is also presented.

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“…The magnification factor attained was 5.5. The scheme typically used to achieve 2D magnification consists of two crossed asymmetric crystals inconfiguration (Boetinger et al, 1979;Stampanoni et al, 2002;Schä fer & Kö hler, 2003;Senin et al, 2009), where the diffraction planes of the first and the second crystal are set perpendicular to one another. The 2D magnification can also be achieved by monolithic magnifiers where at least two successive sets of diffracting planes in one single-crystal block are magnifying the image in two orthogonal directions (Korytá r et al, 2003).…”

Section: Introductionmentioning

confidence: 99%

In-line Bragg magnifier based on V-shaped germanium crystals

Vagovič

Korytár

Mikulı́k

et al. 2011

J Synchrotron Radiat

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In this work an X-ray imaging system based on a recently developed in-line two-dimensional Bragg magnifier composed of two monolithic V-shaped crystals made of dislocation-free germanium is presented. The channel-cut crystals were used in one-dimensional and in two-dimensional (crossed) configurations in imaging applications and allowed measurement of phase-contrast radiograms both in the edge-enhanced and in the holographic regimes. The measurement of the phase gradient in two orthogonal directions is demonstrated. The effective pixel size attained was 0.17 µm in the one-dimensional configuration and 0.5 µm in the two-dimensional setting, offering a twofold improvement in spatial resolution over devices based on silicon. These results show the potential for applying Bragg magnifiers to imaging soft matter at high resolution with reduced dose owing to the higher efficiency of Ge compared with Si.

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Gain in spatial resolution of X-ray laboratory microtomographs with enlarging X-ray optical elements

Cited by 4 publications

References 4 publications

Monochromatic computed microtomography using laboratory and synchrotron sources and X-ray fluorescence analysis for comprehensive analysis of structural changes in bones

Monochromatic computed microtomography using laboratory and synchrotron sources and X-ray fluorescence analysis for comprehensive analysis of structural changes in bones

X-ray Bragg magnifier microscope as a linear shift invariant imaging system: image formation and phase retrieval

In-line Bragg magnifier based on V-shaped germanium crystals

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