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Spline based iterative phase retrieval algorithm for X-ray differential phase contrast radiography

Publications associées (41)

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Phase sensitive X-ray imaging methods can provide substantially increased contrast over conventional absorption-based imaging and therefore new and otherwise inaccessible information. The use of gratings as optical elements in hard X-ray phase imaging over ...

National Academy of Sciences2010

Hard X-ray imaging for landslide research

Gérard Gremaud

Synchrotron phase-contrast hard X-ray imaging is used to provide highly efficient direct visualization of landslide dynamics and granular flows in fully wet granular piles. High penetration capability and phase-contrast enhancement of hard X-rays offer mar ...

2010

Medium resolution X-Ray Computed Tomography of hollow cylindrical samples of Boom Clay

Laurent Gastaldo, Vincent Labiouse, Shuang You, Laura Vigne

Laboratory experiments carried out at the LMR-EPFL on thick-walled hollow cylindrical samples aim at modelling at small-scale conditions similar to those that will be experienced by host rocks around disposal galleries for heat emitting radioactive waste. ...

CRC Press/Balkema2010

Soft-tissue phase-contrast tomography with an x-ray tube source

Christian David

We report the first experimental soft-tissue phase-contrast tomography results using a conventional x-ray tube source, with a millimeter-sized focal spot. The setup is based on a Talbot-Lau grating interferometer operated at a mean energy of 28 keV. We pre ...

2009

Phase-contrast imaging and tomography at 60 keV using a conventional x-ray tube source

Christian David

Phase-contrast imaging at laboratory-based x-ray sources using grating interferometers has been developed over the last few years for x-ray energies of up to 28 keV. Here, we show first phase-contrast projection and tomographic images recorded at significa ...

2009

Digital holographic microscopy at fundamental and second harmonic wavelengths

Christian Depeursinge, Etienne Shaffer

Optical second harmonic generation, thanks to its coherent nature, is a suitable signal for interferometric measurements, such as digital holography: a well-established imaging technique that allows recovering of the complex diffraction wavefields from whi ...

SPIE2009

Quantitative phase-contrast tomography of a liquid phantom using a conventional x-ray tube source

Christian David

Over the last few years, differential phase-contrast x-ray computed tomography (PC-CT) using a hard x-ray grating interferometer and polychromatic x-ray tube sources has been developed. The method allows for simultaneous determination of the attenuation co ...

2009

Imaging with visible light today uses numerous contrast mechanisms, including bright- and dark-field contrast, phase-contrast schemes and confocal and fluorescence-based methods. X-ray imaging, on the other hand, has only recently seen the development of a ...

2008

X-ray phase radiography and tomography of soft tissue using grating interferometry

Christian David

X-ray phase and absorption radiographs and tomograms of the heart of a rat were taken with an X-ray grating interferometer with monochromatic synchrotron radiation at a photon energy of 17.5 keV. The phase images show largely superior quality with respect ...

2008

Grating interferometer based scanning setup for hard x-ray phase contrast imaging

Christian David

In x-ray radiography, particularly for technical and industrial applications, a scanning setup is very often favorable when compared to a direct two-dimensional image acquisition. Here, we report on an efficient scanning method for grating based x-ray phas ...

2007