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Publications associées (55)

Sensitivity of X-ray grating interferometry

Simon Rutishauser, Christian David, Peter Modregger, Marco Stampanoni

It is known that the sensitivity of X-ray phase-contrast grating interferometry with regard to electron density variations present in the sample is related to the minimum detectable refraction angle. In this article a numerical framework is developed that ...

Optical Society of America2011

High resolution, large field of view x-ray differential phase contrast imaging on a compact setup

Christian David, Peter Modregger, Marco Stampanoni

X-ray grating interferometry is a well established technique to perform differential phase contrast imaging on conventional x-ray tubes. So far, the application of this technique in commercial micro computed tomography scanners has remained a major challen ...

American Institute of Physics2011

Non-linear regularized phase retrieval for unidirectional X-ray differential phase contrast radiography

Peter Modregger, Marco Stampanoni

Optical Society of America2011

Three-dimensional morphometry of strained bovine periodontal ligament using synchrotron radiation-based tomography

Joël Cugnoni, John Botsis, Marzio Bergomi, Philipp Schneider, Marco Stampanoni

The periodontal ligament (PDL) is a highly vascularized soft connective tissue. Previous studies suggest that the viscous component of the mechanical response may be explained by the deformation-induced collapse and expansion of internal voids (i.e. chiefl ...

2010

Connectivity of Phases and Growth Mechanisms in Peritectic Alloys Solidified at Low Speed: an X-Ray Tomography Study of Cu-Sn

Michel Rappaz, Jonas Valloton, André Phillion, Marco Stampanoni

The variety of microstructures that form at low solidification speed in peritectic alloys, bands, and islands, or even coupled (or cooperative) growth of the primary alpha and peritectic beta phases, have been previously explained by nucleation-growth mech ...

Springer Verlag2010

Low-dose, simple, and fast grating-based X-ray phase-contrast imaging

Marco Stampanoni, Ziyu Wu

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

Pore space analysis of beech wood: The vessel network

Marco Stampanoni

Walter de Gruyter2010

Advanced phase-contrast imaging using a grating interferometer

Christian David, Marco Stampanoni

Phase-sensitive X-ray imaging methods can provide substantially increased contrast over conventional absorption-based imaging, and therefore new and otherwise inaccessible information. Differential phase-contrast (DPC) imaging, which uses a grating interfe ...

2009

Brachiopod punctae: a complexity in shell biomineralisation

Marco Stampanoni

Perforations ("punctae") are one of the most characteristic morphological shell features in calcite brachiopods. The significance of punctae is that they represent discontinuities in shell biomineralisation and thus add a level of complexity that must be a ...

Elsevier2009

Hydraulic contacts controlling water flow across porous grains

Dani Or, Marco Stampanoni

Water flow between porous grains varies widely depending on the water distribution in contacts between grains. The hydraulic behavior of contacts varies from highly conductive when water fills the contacts to a bottleneck to flow as water pressure drops an ...

2007

Hard X-ray phase imaging and tomography using a grating interferometer

Amela Groso, Christian David, Marco Stampanoni

An interferometric technique for hard X-rays is presented. It is based on two transmission gratings and a phase-stepping technique, and it provides separate radiographs of the phase and absorption profiles of bulk samples. Tomographic reconstruction yields ...

2007

TOMCAT: A beamline for TOmographic Microscopy and Coherent rAdiology experimenTs

Simon Nessim Henein, Amela Groso, Marco Stampanoni

Synchrotron‐based X‐ray Tomographic Microscopy (SRXTM) is nowadays a powerful technique for non‐destructive, high‐resolution investigations of a broad kind of materials. High‐brilliance and high‐coherence third generation synchrotron radiation facilities a ...

2007

3D experimental investigation of the microstructure of cement pastes using synchrotron X-ray microtomography (mu CT)

Giorgio Margaritondo, Amela Groso, Karen Scrivener, Emmanuel Gallucci, Marco Stampanoni

Cement pastes aged from 1 to 60 days were studied using synchrotron microtomography on the MS-X04SA beam line at the Swiss Light Source. This allowed three dimensional images to be obtained with a resolution approaching that of backscattered electron image ...

Pergamon-Elsevier Science Ltd2007

X-ray phase imaging with a grating interferometer

Christian David, Marco Stampanoni

Using a high-efficiency grating interferometer for hard X rays (10-30 keV) and a phase-stepping technique, separate radiographs of the phase and absorption profiles of bulk samples can be obtained from a single set of measurements. Tomographic reconstructi ...

2005

X-ray beam-position monitoring in the sub-micrometre and sub-second regime

Christian David, Marco Stampanoni

It is demonstrated that X-ray beam positions can be extracted from two-dimensional profiles with sub-pixel resolution. Beam-position measurements utilizing a self-designed low-cost two-dimensional detector have been performed at two synchrotron radiation b ...

2005

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