Publication
Hard-X-ray dark-field imaging using a grating interferometer
Publications associées (111)
X-ray spectrometry and imaging for ancient administrative handwritten documents
Giorgio Margaritondo, Frédéric Kaplan, Fauzia Albertin, Marco Stampanoni
‘Venice Time Machine’ is an international program whose objective is transforming the ‘Archivio di Stato’ – 80 km of archival records documenting every aspect of 1000 years of Venetian history – into an open-access digital information bank. Our study is pa ...
Wiley-Blackwell2015Visualization of water drying in porous materials by X-ray phase contrast imaging
We present in this study results from X-ray tomographic microscopy with synchrotron radiation performed both in attenuation and phase contrast modes on a limestone sample during two stages of water drying. No contrast agent was used in order to increase th ...
Wiley-Blackwell2015X-ray spectrometry and imaging for ancient administrative handwritten documents
Giorgio Margaritondo, Frédéric Kaplan, Fauzia Albertin, Marco Stampanoni
‘Venice Time Machine’ is an international program whose objective is transforming the ‘Archivio di Stato’ – 80 km of archival records documenting every aspect of 1000 years of Venetian history – into an open‐access digital information bank. Our study is pa ...
2015Spline based iterative phase retrieval algorithm for X-ray differential phase contrast radiography
Michaël Unser, Masih Nilchian, Marco Stampanoni
Differential phase contrast imaging using grating interferometer is a promising alternative to conventional X-ray radiographic methods. It provides the absorption, differential phase and scattering information of the underlying sample simultaneously. Phase ...
Optical Soc Amer2015Ancient administrative handwritten documents: X-ray analysis and imaging
Giorgio Margaritondo, Frédéric Kaplan, Fauzia Albertin
Handwritten characters in administrative antique documents from three centuries have been detected using different synchrotron X-ray imaging techniques. Heavy elements in ancient inks, present even for everyday administrative manuscripts as shown by X-ray ...
International Union of Crystallography2015Simultaneous submicrometric 3D imaging of the micro-vascular network and the neuronal system in a mouse spinal cord
Peter Modregger, Giuseppe Battaglia
Faults in vascular (VN) and neuronal networks of spinal cord are responsible for serious neurodegenerative pathologies. Because of inadequate investigation tools, the lacking knowledge of the complete fine structure of VN and neuronal system represents a c ...
Nature Publishing Group2015Isotropic Inverse-Problem Approach for Two-Dimensional Phase Unwrapping
Michaël Unser, Demetri Psaltis, Ulugbek Kamilov
We propose a new technique for two-dimensional phase unwrapping. The unwrapped phase is found as the solution of an inverse problem that consists in the minimization of an energy functional. The latter includes a weighted data fidelity term that favors spa ...
JOSA2015Optical microscopy for imaging through scattering media
Optical microscopy has been widely used in the life sciences and biological research for several decades. It possesses many advantages over x-ray radiography, computed tomography, ultrasound imaging and magnetic resonance imaging, in terms of being low cos ...
EPFL2014Virtual X-ray Reading (VXR) of Ancient Administrative Handwritten Documents
Giorgio Margaritondo, Frédéric Kaplan, Fauzia Albertin, Marco Stampanoni
The study of ancient documents is too often confined to specimens of high artistic value or to official writings. Yet, a wealth of information is often stored in administrative records such as ship records, notary papers, work contract, tax declaration, co ...
2014X-ray Spectrometry and imaging for ancient handwritten document
Giorgio Margaritondo, Frédéric Kaplan, Fauzia Albertin, Marco Stampanoni
We detected handwritten characters in ancient documents from several centuries with different synchrotron x-ray imaging techniques. The results were correlated to those of x-ray fluorescence analysis. In most cases, heavy elements produced high image quali ...
2014