@inproceedings{cc36cdc4698544f1ba8ab7d8a31f4140,
title = "Sampling effects for emerging cone-beam CT systems and scan trajectories: from Tuy's condition to system design and routine image quality tests",
abstract = "Principles of cone-beam sampling are considered in terms of an analytical figure of merit for data incompleteness [tan] and experimental measurements of cone-beam artifact magnitude in an image quality phantom. The phantom incorporates disk-pairs oriented parallel to the axial plane (perpendicular to the z-axis) at various locations throughout the field of view. Experiments were conducted in which the phantom was imaged using a mobile C-arm with various, tilted and untilted source-detector trajectories (orbits). In the current work, scan orbits were limited to circular orbits - viz., a semicircular arc spanning 196°. The magnitude of cone-beam artifacts was assessed in terms of the signal modulation (zmod) in the narrow region between disk-pairs, and the relationship of zmod and tan was evaluated for each orbit. The results show visually and quantitatively the effect of scan orbit and object orientation on cone-beam sampling effects and demonstrate the relationship between analytical tan and empirical zmod figures of merit. The analysis suggests a means by which cone-beam sampling effects (incompleteness) can be quantifiably considered in the development of new cone-beam CT system geometries, multi-source configurations, and protocols involving novel source-detector trajectories.",
keywords = "C-arm, Tuy's condition, completeness, cone-beam CT, cone-beam artifacts, image quality",
author = "A. Tersol and P. Wu and R. Clackdoyle and Boone, {J. M.} and Siewerdsen, {J. H.}",
note = "Publisher Copyright: {\textcopyright} 2022 SPIE.; Medical Imaging 2022: Physics of Medical Imaging ; Conference date: 21-03-2022 Through 27-03-2022",
year = "2022",
doi = "10.1117/12.2613139",
language = "English (US)",
series = "Progress in Biomedical Optics and Imaging - Proceedings of SPIE",
publisher = "SPIE",
editor = "Wei Zhao and Lifeng Yu",
booktitle = "Medical Imaging 2022",
}