Publications de Vincent Gajdosik

Feasibility of direct mapping of cerebral fluorodeoxy-D-glucose metabolism in situ at subcellular resolution using soft X-ray fluorescence

Rolf Gruetter, Carole Poitry-Yamate, Mario Gaetano Lepore, Vincent Gajdosik

Glucose metabolism is difficult to image with cellular resolution in mammalian brain tissue, particularly with (18) fluorodeoxy-D-glucose (FDG) positron emission tomography (PET). To this end, we explored the potential of synchrotron-based low-energy X-ray ...

Wiley-Blackwell2013

Hard x-ray Zernike microscopy reaches 30 nm resolution

Giorgio Margaritondo, Vincent Gajdosik

Since its invention in 1930, Zernike phase contrast has been a pillar in optical microscopy and more recently in x-ray microscopy, in particular for low-absorption-contrast biological specimens. We experimentally demonstrate that hard-x-ray Zernike microsc ...

Optical Society of America2011

Phase-contrast and fluorescence X-ray imaging of soft and bio matter

Vincent Gajdosik

The high brightness and coherence of X-ray synchrotron sources and steady development in X-ray optics are critical ingredients in novel imaging techniques for a variety of domains. We employed several different approaches and a wide energy spectrum of radi ...

EPFL2009

The serpin Spn5 is essential for wing expansion in Drosophila melanogaster

Giorgio Margaritondo, Vincent Gajdosik

Serpins, a superfamily of protease inhibitors, control proteolytic cascades in many physiological processes. Genomic studies have revealed the presence of a high number of serpin-encoding genes in Drosophila melanogaster, but their functions remain largely ...

University of the Basque Country Press2008

A numerical solution of a one-dimensional blood flow model - moving grid approach

Vincent Gajdosik

We consider a one-dimensional blood flow model suitable for larger arteries. It consists of a hyperbolic system of two coupled nonlinear equations. The model has already been successfully used in practice. Its numerical solution is usually achieved by mean ...

Elsevier2008

Coupled tomography and distinct-element-method approach to exploring the granular media microstructure in a jamming hourglass

Giorgio Margaritondo, Michaël Unser, Thomas Liebling, Daniel Sage, Lionel Pournin, Michel Tsukahara, Slobodan Mitrovic, Marco Ramaioli, Vincent Gajdosik

We describe an approach for exploring microscopic properties of granular media that couples x-ray microtomography and distinct-element-method (DEM) simulations through image analysis. We illustrate it via the study of the intriguing phenomenon of instant a ...

APS2008