Hamburg 2016 – scientific programme

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ST: Fachverband Strahlen- und Medizinphysik

ST 2: Biomedical Imaging I

ST 2.1: Talk

Tuesday, March 1, 2016, 13:45–14:00, VMP6 HS C

Introduction to grating-based phase-contrast x-ray imaging — •Gisela Anton — Erlangen Centre for Astroparticle Physics, Universität Erlangen- Nürnberg, Erwin-Rommel-Straße 1, 91058 Erlangen

In grating-based phase contrast x-ray imaging with a Talbot-Lau interferometer, a standard x-ray tube in combination with a micro-structured source grating, a phase-grating and an analyzer grating are used to obtain images of the object's attenuation strength, its gradients in the real part of the refractive index (differential phase) and its ultra-small angle scattering strength (dark-field). The dark-field signal is sensitive to the micro-structure of the object on a scale defined by the grating periods which are much smaller than the pixel size of a standard flat-panel x-ray detector. In this contribution, the principles of grating-based x-ray phase-contrast and dark-field imaging will be presented.