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Proceedings Paper

Exact fan-beam reconstruction via ramp-filtered backprojection and local compensation
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Paper Abstract

A novel exact fan-beam image reconstruction formula is presented and validated using both mathematical phantom data and clinical data. This algorithm takes the form of the standard ramp filtered backprojection (FBP) algorithm plus local compensation terms. An equal weighting scheme is utilized in this algorithm in order to properly account for redundantly measured projection data. The algorithm has the desirable property of maintaining a mathematically exact result for: the full scan mode (2π), the short scan mode (π+ full fan angle), and the super-short scan mode (less than (π + full fan angle)). Another desirable feature of this algorithm is that it is derivative-free. The derivative-free nature of this algorithm distinguishes it from other exact fan-beam FBP algorithms.

Paper Details

Date Published: 20 April 2005
PDF: 11 pages
Proc. SPIE 5745, Medical Imaging 2005: Physics of Medical Imaging, (20 April 2005); doi: 10.1117/12.594694
Show Author Affiliations
Guang-Hong Chen, Univ. of Wisconsin/Madison (United States)
Ranjini Tolakanahalli, Univ. of Wisconsin/Madison (United States)
Tingliang Zhuang, Univ. of Wisconsin/Madison (United States)
Brian E. Nett, Univ. of Wisconsin/Madison (United States)
Jiang Hsieh, GE HealthcareTechnologies (United States)

Published in SPIE Proceedings Vol. 5745:
Medical Imaging 2005: Physics of Medical Imaging
Michael J. Flynn, Editor(s)

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