Mainz 2014 – scientific programme
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ST: Fachverband Strahlen- und Medizinphysik
ST 2: Biomedical Imaging I
ST 2.6: Talk
Tuesday, March 25, 2014, 15:15–15:30, RW 2
Energy weighting in grating-based x-ray phase-contrast imaging — •Georg Pelzer1, Thomas Weber1, Gisela Anton1, Florian Bayer1, Wilhelm Haas1,2, Florian Horn1, Manuel Kraus1, Jens Rieger1, André Ritter1, Ina Ritter1, Andrea Zang1, Thomas Weber1, and Thilo Michel1 — 1ECAP - Erlangen Centre for Astroparticle Physics, Universität Erlangen-Nürnberg, Erwin- Rommel-Straße 1, 91058 Erlangen — 2Lehrstuhl für Mustererkennung, Universität Erlangen-Nürnberg, Martensstraße 3, 91058 Erlangen
By using an energy-resolving photon-counting detector in grating-based x-ray phase-contrast imaging it is possible to reduce the necessary dose. We derived energy weighting factors for phase-contrast imaging. Evaluation measurements with the hybrid photon-counting detector Dosepix were performed. The concept of energy binning implemented in the pixel electronics of this detector allows counting of photons in 16 energy channels. With this technique the spectral information can be obtained pixel wise from one single acquisition. The results presented in this contribution demonstrate the advantages of spectroscopic photon-counting in differential phase-contrast imaging.