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ST: Fachverband Strahlen- und Medizinphysik
ST 2: Biomedical Imaging I
ST 2.3: Vortrag
Dienstag, 25. März 2014, 14:30–14:45, RW 2
Current State of the Art of Grating-Based Laboratory X-ray Phase-Contrast Computed Tomography — •Lorenz Birnbacher1, Marian Willner1, Mathias Marschner1, Jan Meiser2, Julia Herzen3, Michael Chabior1, and Franz Pfeiffer1 — 1Department of Physics (E17) & IMETUM, Chair of Biomedical Physics, Technische Universität München, D-85748 Garching — 2Karlsruher Institut für Technologie (KIT), Institut für Mikrostrukturtechnik, D-76021 Karlsruhe — 3Institute of Materials Science, Helmholtz-Zentrum Geesthacht, D-21502 Geesthacht
X-ray phase-contrast computed tomography (PC-CT), which was initially performed with highly coherent, monochromatic synchrotron radiation, provides improved soft tissue contrast. With the development of a three-grating Talbot-Lau interferometer, PC-CT is also available at conventional laboratory X-ray sources. This offers better access and a larger field of view at the cost of lower spatial resolution in comparison to synchrotron sources.
New grating production techniques and grating designs as well as advanced reconstruction algorithms could improve the performance of laboratory PC-CT setups. Optimized measurement techniques could further reduce the measurement time and increase the setup sensitivity.
We show the current state of our grating-based PC-CT setup with recently acquired imaging results of biomedical samples using a rotating anode and a single photon counting Pilatus II detector. Thereby, we are able to retrieve fine differences in electron density, which offers new possibilities of soft matter investigation.