Publications related to Phase contrast X-ray imaging of large samples using an incoherent laboratory source

Multilevel weighted least squares polynomial approximation

Weighted least squares polynomial approximation uses random samples to determine projections of functions onto spaces of polynomials. It has been shown that, using an optimal distribution of sample locations, the number of samples required to achieve quasi ...

2017

Shapes from Pixels

Mitra Fatemi

In today's digital world, sampling is at the heart of any signal acquisition device. Imaging devices are ubiquitous examples that capture two-dimensional visual signals and store them as the pixels of discrete images. The main concern is whether and how th ...

EPFL2016

Attributing Aliasing Artifacts in Dirty Intensity Fields to their Parent Source

Matthieu Martin Jean-André Simeoni

Estimating intensity fields of stochastic phenomenons is of crucial interest in many scientific applications. Typical experimental setups involve an acquisition system, that subsequently filters and samples the probed intensity field. This equivalently def ...

2016

Association of PCK1 with Body Mass Index and Other Metabolic Features in Patients With Psychotropic Treatments

Pierre Magistretti, Aurélie Delacrétaz

Weight gain is a major health problem among psychiatric populations. It implicates several receptors and hormones involved in energy balance and metabolism. Phosphoenolpyruvate carboxykinase 1 is a rate-controlling enzyme involved in gluconeogenesis, glyce ...

Lippincott, Williams & Wilkins2015

Random sampling of bandlimited signals on graphs

Pierre Vandergheynst, Rémi Gribonval, Gilles Puy, Nicolas Tremblay

We study the problem of sampling

k

-bandlimited signals on graphs. We propose two sampling strategies that consist in selecting a small subset of nodes at random. The first strategy is non-adaptive, \ie, independent of the graph structure, and its perform ...

2015

Combining Monte Carlo methods with coherent wave optics for the simulation of phase-sensitive X-ray imaging

Peter Modregger, Marco Stampanoni

Phase-sensitive X-ray imaging shows a high sensitivity towards electron density variations, making it well suited for imaging of soft tissue matter. However, there are still open questions about the details of the image formation process. Here, a framework ...

International Union of Crystallography2014

Off-axis digital holographic camera for quantitative phase microscopy

Christian Depeursinge, Christophe Moser, Frédéric Montfort, Zahra Monemhaghdoust

We propose and experimentally demonstrate a digital holographic camera which can be attached to the camera port of a conventional microscope for obtaining digital holograms in a self-reference configuration, under short coherence illumination and in a sing ...

Optical Soc Amer2014

Prospects of warm dense matter research at HiRadMat facility at CERN using 440 MeV SPS proton beam

Juan Blanco Sancho, Rudiger Schmidt

In this paper we present numerical simulations of heating of a solid copper cylinder by the 440 GeV proton beam delivered by the Super Proton Synchrotron (SPS) at CERN. The beam is made of 288 proton bunches while each bunch comprises of 1.15.10(11) so tha ...

Elsevier Science Bv2013

On Sampling and Coding for Distributed Acoustic Sensing

Martin Vetterli, Emre Telatar, Robert Konsbruck

The issue of how to efficiently represent the data collected by a network of microphones recording spatio-temporal acoustic wave fields is addressed. Each sensor node in the network samples the sound field, quantizes the samples and transmits the encoded s ...

2012

Sensor Networks for Diffusion Fields: Detection of Sources in Space and Time

Martin Vetterli, Ivan Dokmanic, Juri Ranieri, Amina Chebira

Abstract—We consider the problem of reconstructing a diffusion field, such as temperature, from samples collected by a sensor network. Motivated by the fast decay of the eigenvalues of the diffusion equation, we approximate the field by a truncated series. ...

2011

Phase contrast X-ray imaging of large samples using an incoherent laboratory source

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Multilevel weighted least squares polynomial approximation

Shapes from Pixels

Attributing Aliasing Artifacts in Dirty Intensity Fields to their Parent Source

Association of PCK1 with Body Mass Index and Other Metabolic Features in Patients With Psychotropic Treatments

Random sampling of bandlimited signals on graphs

Combining Monte Carlo methods with coherent wave optics for the simulation of phase-sensitive X-ray imaging

Off-axis digital holographic camera for quantitative phase microscopy

Prospects of warm dense matter research at HiRadMat facility at CERN using 440 MeV SPS proton beam

On Sampling and Coding for Distributed Acoustic Sensing

Sensor Networks for Diffusion Fields: Detection of Sources in Space and Time

Shapes from Pixels

Attributing Aliasing Artifacts in Dirty Intensity Fields to their Parent Source

Random sampling of bandlimited signals on graphs

Association of PCK1 with Body Mass Index and Other Metabolic Features in Patients With Psychotropic Treatments

Combining Monte Carlo methods with coherent wave optics for the simulation of phase-sensitive X-ray imaging

Prospects of warm dense matter research at HiRadMat facility at CERN using 440 MeV SPS proton beam

Sensor Networks for Diffusion Fields: Detection of Sources in Space and Time

Multilevel weighted least squares polynomial approximation

Off-axis digital holographic camera for quantitative phase microscopy

On Sampling and Coding for Distributed Acoustic Sensing