
Proceedings Paper
Extended volume coverage in helical cone-beam CT by using PI-line-based BPF algorithmFormat | Member Price | Non-Member Price |
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Paper Abstract
We compared data requirements of filtered-backprojection (FBP) and backprojection-filtration (BPF) algorithms
based on PI-lines in helical cone-beam CT. Since the filtration process in FBP algorithm needs all the projection data
of PI-lines for each view, the required detector size should be bigger than the size that can cover Tam-Danielsson
(T-D) window to avoid data truncation. BPF algorithm, however, requires the projection data only within the T-D
window, which means smaller detector size can be used to reconstruct the same image than that in FBP. In other
words, a longer helical pitch can be obtained by using BPF algorithm without any truncation artifacts when a fixed
detector size is given. The purpose of the work is to demonstrate numerically that extended volume coverage in
helical cone-beam CT by using PI-line-based BPF algorithm can be achieved.
Paper Details
Date Published: 16 March 2007
PDF: 8 pages
Proc. SPIE 6510, Medical Imaging 2007: Physics of Medical Imaging, 651055 (16 March 2007); doi: 10.1117/12.713237
Published in SPIE Proceedings Vol. 6510:
Medical Imaging 2007: Physics of Medical Imaging
Jiang Hsieh; Michael J. Flynn, Editor(s)
PDF: 8 pages
Proc. SPIE 6510, Medical Imaging 2007: Physics of Medical Imaging, 651055 (16 March 2007); doi: 10.1117/12.713237
Show Author Affiliations
Seungryong Cho, Univ. of Chicago (United States)
Xiaochuan Pan, Univ. of Chicago (United States)
Published in SPIE Proceedings Vol. 6510:
Medical Imaging 2007: Physics of Medical Imaging
Jiang Hsieh; Michael J. Flynn, Editor(s)
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