Dark-Field Imaging on a Clinical CT System: Modelling of Interferometer Vibrations
Schmid C, Viermetz M, Gustschin N, Haeusele J, Lasser T, Koehler T, Pfeiffer F (2022)
Publication Type: Conference contribution
Publication year: 2022
Journal
Publisher: SPIE
Book Volume: 12304
Conference Proceedings Title: Proceedings of SPIE - The International Society for Optical Engineering
Event location: Virtual, Online
ISBN: 9781510656697
DOI: 10.1117/12.2646676
Abstract
X-ray computed tomography (CT) is an invaluable imaging technique for non-invasive medical diagnosis. However, for soft tissue in the human body the inherent small difference in attenuation limits its significance. Grating-based X-ray phase-contrast is a relatively novel imaging method which detects additional interaction mechanisms between photons and matter, namely refraction and small-angle scattering, to generate additional images with different contrast. The experimental setup involves a Talbot-Lau interferometer whose susceptibility to mechanical vibrations hindered acquisition schemes suitable for clinical routine in the past. We present a processing pipeline to identify spatially and temporally variable fluctuations occurring in the first interferometer installed on a continuously rotating clinical CT gantry. The correlations of the vibrations in the modular grating setup are exploited to identify a small number of relevant vibration modes, allowing for an artifact-free reconstruction of a sample.
Involved external institutions
Germany (DE)
Netherlands (NL)How to cite
APA:
Schmid, C., Viermetz, M., Gustschin, N., Haeusele, J., Lasser, T., Koehler, T., & Pfeiffer, F. (2022). Dark-Field Imaging on a Clinical CT System: Modelling of Interferometer Vibrations. In Joseph Webster Stayman (Eds.), Proceedings of SPIE - The International Society for Optical Engineering. Virtual, Online: SPIE.
MLA:
Schmid, Clemens, et al. "Dark-Field Imaging on a Clinical CT System: Modelling of Interferometer Vibrations." Proceedings of the 7th International Conference on Image Formation in X-Ray Computed Tomography, Virtual, Online Ed. Joseph Webster Stayman, SPIE, 2022.
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