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Proceedings Paper

Fast reconstruction for unconstrained cone-beam tomosynthesis
Author(s): Beilei Wang; Kenneth Barner; Denny Lee
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Paper Abstract

Traditional Tomosynthesis requires the X-ray source to be parallel beams or cone beams constrained to the same plane above the object of interest. Commonly, the X-ray sources are placed uniformly around a circle or along a line in the same plane, which demands fixed and high-precision equipment. To eliminate the constraints on the X-ray sources and obtain fast and efficient reconstruction with adequate quality, a fast and unconstrained cone beam Tomosynthesis reconstruction method as well as the corresponding deblurring method is presented in this paper. In this method, two reference balls, whose connecting line is parallel to the detector, are placed above the detector. According to the information provided by these two balls, the X-ray source position and its relative motion are readily calculated for the reconstruction and the corresponding deblurring processes. A layer-by-layer, rather than a voxel-by-voxel, reconstruction is utilized in order to speed up the calculation. This fast and unconstrained cone beam Tomosynthesis has a large commercial value, allowing unconstrained projection acquisition and making portable and relatively cheap Tomosynthesis equipment possible.

Paper Details

Date Published: 6 May 2004
PDF: 9 pages
Proc. SPIE 5368, Medical Imaging 2004: Physics of Medical Imaging, (6 May 2004); doi: 10.1117/12.534597
Show Author Affiliations
Beilei Wang, Univ. of Delaware (United States)
Kenneth Barner, Univ. of Delaware (United States)
Denny Lee, Direct Radiography Corp. (United States)

Published in SPIE Proceedings Vol. 5368:
Medical Imaging 2004: Physics of Medical Imaging
Martin J. Yaffe; Michael J. Flynn, Editor(s)

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