X-ray Phase Shift and Phase Contrast
Effects of Tube Voltage on Phase Contrast Imaging for Different Microfocus X Ray Tubes
... Keywords: Phase-Contrast Imaging; Edge Enhancement; X-Ray; Tube Voltage ...Conventional x-ray imaging is based on the attenuation properties of an object, however, for some weak ...
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Edge illumination x-ray phase contrast CT
... the phase and absorption (analyser) gratings are placed downstream of the object, a significant fraction of radiation that delivers dose to the object does not contribute to the image formation ...the phase ...
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Sensitivity of edge illumination X-ray phase-contrast imaging
... edge phase-based signal has been extended here to the case of EI XPCi, a technique currently under intensive development at ...the phase shift and to a function of the illumination curve and its first ...
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X-ray phase contrast imaging: From synchrotrons to conventional sources
... the vertical direction, and to extend sufficiently to cover the full extent of the object in the horizontal one. The detector consists of a single row of pixels, as large as the beam in the horizontal direction. As often ...
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Phase-contrast X-ray imaging with synchrotron radiation for materials science applications
... the phase con- trast achieved depends on a derivative (first or second) of the phase shift u, and are particularly appropriate to studies which benefit from edge enhancement, ...of phase and ...
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Inclusion of coherence in Monte Carlo models for simulation of x-ray phase contrast imaging
... the phase grating, the self image is ...the phase shift induced by the object can be ...keV X-ray beam. Both the phase and the absorption grating have a pitch of m and a 50% ...
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Optimization and new applications of edge-illumination based X-ray phase contrast CT
... the phase shift directly however is not possible, since X-ray detectors are sensitive to changes in X-ray ...a phase contrast image, the imaging system must be able ...
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Geometric correction method for 3d in-line X-ray phase contrast image reconstruction
... of X-ray phase contrast imaging (XPCI) components causes projection data misplaced, and thus result in the reconstructed slice images of computed tomography (CT) blurred or with edge ...a ...
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3D Cardiac microvessels embolization imaging based on X-ray phase contrast imaging
... by X-ray phase contrast ...[17]. Contrast and resolution are derived from direct Fresnel diffraction with synchrotron radiation which has good spatial co- herence and high ...object, ...
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Single-shot X-ray phase-contrast computed tomography with non-microfocal laboratory sources
... to shift the argument of the illumination curve by −Δx ¼ −k −1 z 2 ∇ x ϕ, where z 2 is the propagation distance between the sample and the detector mask, and Δx is the spatial shift of the beam along ...
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The effect of the spatial sampling rate on quantitative phase information extracted from planar and tomographic edge illumination x-ray phase contrast images
... The lower optimal sampling rate in tomographic com- pared to planar EI XPCi can be understood intuitively. In planar EI XPCi, a low sampling rate is not sufficient since not all parts of the sample are illuminated by the ...
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X-ray phase-contrast imaging
... Abstract X-ray imaging is a standard tool for the non-destructive inspection of the in- ternal structure of ...the X-rays traversing the sample are subjected to different amount of absorption in ...
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Contrast detail phantoms for X-ray phase-contrast mammography and tomography
... low- contrast details of different size on images obtained at conventional mammog- raphy unit, and at a monochromatic synchrotron radiation source, in absorp- tion based and phase contrast imaging ...
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Quantitative edge illumination x-ray phase contrast tomography
... Two sets of experiments have been performed to validate the theory: one with a “single slit” EI XPCi setup at a synchrotron, and one with a “multi slit” setup implemented entirely with commercial x-ray ...
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Contributions to the characterization of grating-based x-ray phase-contrast imaging
... different contrast channels obtainable by grating- based imaging were investigated and ...the phase ϕ and the amplitude a 1 of the phase-stepping oscillation are described by a wrapped Gaussian PDF ...
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Low-dose phase contrast tomography with conventional x-ray sources
... commercial x-ray source with an ex- tended nonmicrofocal spot and a polychromatic ...the phase shifting proper- ties of an object provided a higher SDNR than attenuation ...
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Tilted-grating approach for scanning-mode X-ray phase contrast imaging
... existent X-ray phase-contrast modalities, grating interferometry appears as a very promising technique for commercial applications, since it is compatible with conventional X-ray ...
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X-ray phase contrast tomography; proof of principle for post-mortem imaging
... Conventional X-ray CT is quicker, easier to use and more widely available; however, it suffers from poor soft-tissue differentiation, especially in foetuses and children, in the absence of exogenous ...
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Low temperature electroplating for highly conformal x-ray phase contrast gratings
... in contrast, only one half of the samples had plastic deformation regions, all others showed brittle behav- ...the phase contrast imaging process that temperature (induced by radiation) can deform ...
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X-ray Phase-Contrast Tomography: Underlying Physics and Developments for Breast Imaging
... high contrast sensitivity and spatial resolution in the order of 10 µm, while scan times range from hours to tens of ...and X-ray flux since the source size projected at the sample position is ...
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