Image-domain cardiac motion compensation in multidirectional digital chest tomosynthesis

Chumin Zhao; Magdalena Herbst; Thomas Weber; Sebastian Vogt; Ludwig Ritschl; Steffen Kappler; Jeffrey H. Siewerdsen; Wojciech Zbijewski

doi:10.1117/12.2581287

15 February 2021 Image-domain cardiac motion compensation in multidirectional digital chest tomosynthesis

Chumin Zhao, Magdalena Herbst, Thomas Weber, Sebastian Vogt, Ludwig Ritschl, Steffen Kappler, Jeffrey H. Siewerdsen, Wojciech Zbijewski

Author Affiliations +

Proceedings Volume 11595, Medical Imaging 2021: Physics of Medical Imaging; 1159525 (2021) https://doi.org/10.1117/12.2581287
Event: SPIE Medical Imaging, 2021, Online Only

Abstract

We investigate an image-based strategy to compensate for cardiac motion-induced artifacts in Digital Chest Tomosynthesis (DCT). We apply the compensation to conventional unidirectional vertical “↕” scan DCT and to a multidirectional circular trajectory "O" providing improved depth resolution. Propagation of heart motion into the lungs was simulated as a dynamic deformation. The studies investigated a range of motion propagation distances and scan times. Projection-domain retrospective gating was used to detect heart phases. Sparsely sampled reconstructions of each phase were deformably aligned to yield a motion compensated image with reduced sampling artifacts. The proposed motion compensation mitigates artifacts and blurring in DCT images both for “↕” and "O" scan trajectories. Overall, the “O” orbit achieved the same or better nodule structural similarity index in than the conventional “↕” orbit. Increasing the scan time improved the sampling of individual phase reconstructions.

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Citation Download Citation

Chumin Zhao, Magdalena Herbst, Thomas Weber, Sebastian Vogt, Ludwig Ritschl, Steffen Kappler, Jeffrey H. Siewerdsen, and Wojciech Zbijewski "Image-domain cardiac motion compensation in multidirectional digital chest tomosynthesis", Proc. SPIE 11595, Medical Imaging 2021: Physics of Medical Imaging, 1159525 (15 February 2021); https://doi.org/10.1117/12.2581287

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