Hamburg 2016 – wissenschaftliches Programm

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ST: Fachverband Strahlen- und Medizinphysik

ST 2: Biomedical Imaging I

ST 2.5: Vortrag

Dienstag, 1. März 2016, 14:45–15:00, VMP6 HS C

X-Ray Dark-Field Imaging in a continuous Line Scanning Setup with Application in Foreign-Body Detection — •Konstantin Willer, Kai Scherer, Julia Herzen, and Franz Pfeiffer — Department of Physics, Technische Universität München

X-Ray Phase-Contrast and Dark-Field imaging have proven to provide additional information to conventional X-ray attenuation-contrast and have already found its way from synchrotron facilities to laboratories (Pfeiffer et al. [1],[2]). However, the subsequent step, which would lead into medical and industrial applications, is obstructed by limitations in the field of view and long scanning times. To overcome these issues, a continuous line scanning procedure was integrated in a three grating interferometer to retrieve transmission, phase and dark-field information of a sample. It is based on the method presented by Kottler et al. [3] and extended by a continuous sample movement. As a possible industrial application wood and package foam pieces where measured in the background of minced meat to demonstrate the successful image reconstruction of the data obtained from the line scanning procedure and the superiority of the dark-field signal in this particular case.

[1] F. Pfeiffer et al., Hard-X-ray dark-field imaging using a grating interferometer. Nature Materials, February 2008.

[2] F. Pfeiffer et al., Phase retrieval and differential phase-contrast imaging with low-brilliance X-ray sources. Nature Physics, March 2006.

[3] C. Kottler et al., Grating interferometer based scanning setup for hard X-ray phase contrast imaging. The Review of Scientific Instruments, April 2007.