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Proceedings Paper

Image reconstruction in cone-beam CT with a spherical detector using the BPF algorithm
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Paper Abstract

Both flat-panel detectors and cylindrical detectors have been used in CT systems for data acquisition. The cylindrical detector generally offers a sampling of a transverse image plane more uniformly than does a flat-panel detector. However, in the longitudinal dimension, the cylindrical and flat-panel detectors offer similar sampling of the image space. In this work, we investigate a detector of spherical shape, which can yield uniform sampling of the 3D image space because the solid angle subtended by each individual detector bin remains unchanged. We have extended the backprojection-filtration (BPF) algorithm, which we have developed previously for cone-beam CT, to reconstruct images in cone-beam CT with a spherical detector. We also conduct computer-simulation studies to validate the extended BPF algorithm. Quantitative results in these numerical studies indicate that accurate images can be obtained from data acquired with a spherical detector by use of our extended BPF cone-beam algorithms.

Paper Details

Date Published: 2 March 2006
PDF: 6 pages
Proc. SPIE 6142, Medical Imaging 2006: Physics of Medical Imaging, 61424J (2 March 2006); doi: 10.1117/12.652555
Show Author Affiliations
Nianming Zuo, National Lab. of Pattern Recognition (China)
Yu Zou, The Univ. of Chicago (United States)
Tianzi Jiang, National Lab. of Pattern Recognition (China)
Xiaochuan Pan, The Univ. of Chicago (United States)

Published in SPIE Proceedings Vol. 6142:
Medical Imaging 2006: Physics of Medical Imaging
Michael J. Flynn; Jiang Hsieh, Editor(s)

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