@inproceedings{644a43597a3f44a7a6eb297732ab1050,
title = "Image-domain cardiac motion compensation in multidirectional digital chest tomosynthesis",
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 {"}a†•{"}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 {"}a†•{"}and O scan trajectories. Overall, the {"}O{"}orbit achieved the same or better nodule structural similarity index in than the conventional {"}a†•{"}orbit. Increasing the scan time improved the sampling of individual phase reconstructions.",
keywords = "Cardiac motion compensation, Pulmonary nodules, Pulmonary x-ray imaging, Robotic x-ray systems, Tomosynthesis",
author = "Chumin Zhao and Magdalena Herbst and Thomas Weber and Sebastian Vogt and Ludwig Ritschl and Steffen Kappler and Siewerdsen, {Jeffrey H.} and Wojciech Zbijewski",
note = "Publisher Copyright: {\textcopyright} COPYRIGHT SPIE. Downloading of the abstract is permitted for personal use only.; Medical Imaging 2021: Physics of Medical Imaging ; Conference date: 15-02-2021 Through 19-02-2021",
year = "2021",
doi = "10.1117/12.2581287",
language = "English (US)",
series = "Progress in Biomedical Optics and Imaging - Proceedings of SPIE",
publisher = "SPIE",
editor = "Hilde Bosmans and Wei Zhao and Lifeng Yu",
booktitle = "Medical Imaging 2021",
}