Publications de Simon Rutishauser

Two-dimensional ultra-small angle X-ray scattering with grating interferometry

Peter Modregger, Simon Rutishauser, Christian David, Marco Stampanoni

It was recently established that the pixel-wise ultra-small angle x-ray distribution can be retrieved with grating interferometry. However, in these one dimensional approaches the contrast was limited to the direction orthogonal to the structure of the lin ...

AIP American Institute of Physics2014

A sensitive x-ray phase contrast technique for rapid imaging using a single phase grid analyzer

Peter Modregger, Simon Rutishauser, Christian David, Marco Stampanoni

Phase contrast x-ray imaging (PCXI) is a promising imaging modality, capable of sensitively differentiating soft tissue structures at high spatial resolution. However, high sensitivity often comes at the cost of a long exposure time or multiple exposures p ...

Optical Society of America2013

A tilted grating interferometer for full vector field differential x-ray phase contrast tomography

Peter Modregger, Simon Rutishauser, Christian David, Marco Stampanoni

We report on a setup for differential x-ray phase-contrast imaging and tomography, that measures the full 2D phase-gradient information. The setup uses a simple one-dimensional x-ray grating interferometer, in which the grating structures of the interferom ...

Optical Society of America2012

Sensitivity of X-ray grating interferometry

Peter Modregger, Simon Rutishauser, Christian David, 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

Compliant Leg Design for a Quadruped Robot

Auke Ijspeert, Ludovic Righetti, Alexander Spröwitz, Simon Rutishauser, Konstantinos Karakasiliotis

2009

Passive compliant quadruped robot using central pattern generators for locomotion control

Auke Ijspeert, Ludovic Righetti, Simon Rutishauser, Alexander Spröwitz

We present a new quadruped robot, “Cheetah”, featuring three-segment pantographic legs with passive compliant knee joints. Each leg has two degrees of freedom - knee and hip joint can be actuated using proximal mounted RC servo motors, force transmission t ...

2008