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Proceedings Paper

Statistical iterative reconstruction for spectral phase contrast CT
Author(s): Korbinian Mechlem; Thorsten Sellerer; Julia Herzen; Franz Pfeiffer
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Paper Abstract

Recently, we have investigated a new algorithm for combining grating-based differential phase contrast radiography and spectral radiography. The algorithm extracts two basis material images and a dark-field image by simultaneously using the spectral and the phase contrast information. Numerical simulations have shown that the combination of these two imaging methods benefits from the strengths of the individual methods while the weaknesses are mitigated. Quantitatively accurate basis material images are obtained and the additional phase shift information leads to highly reduced basis material image noise levels compared to conventional spectral material decomposition. In this work, we extend our approach to spectral phase contrast CT by developing a one-step statistical iterative reconstruction algorithm. In numerical simulations, we demonstrate the potential for further dose reductions as well as the possibility of eliminating the time-consuming phase stepping procedure which is incompatible with a continuously rotating gantry.

Paper Details

Date Published: 28 May 2019
PDF: 4 pages
Proc. SPIE 11072, 15th International Meeting on Fully Three-Dimensional Image Reconstruction in Radiology and Nuclear Medicine, 1107207 (28 May 2019); doi: 10.1117/12.2534850
Show Author Affiliations
Korbinian Mechlem, Technische Univ. München (Germany)
Thorsten Sellerer, Technische Univ. München (Germany)
Julia Herzen, Technische Univ. München (Germany)
Franz Pfeiffer, Technische Univ. München (Germany)

Published in SPIE Proceedings Vol. 11072:
15th International Meeting on Fully Three-Dimensional Image Reconstruction in Radiology and Nuclear Medicine
Samuel Matej; Scott D. Metzler, Editor(s)

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