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

Guang-Hong Chen; Ranjini Tolakanahalli; Tingliang Zhuang; Brian E. Nett; Jiang Hsieh

doi:10.1117/12.594694

20 April 2005 Exact fan-beam reconstruction via ramp-filtered backprojection and local compensation

Guang-Hong Chen, Ranjini Tolakanahalli, Tingliang Zhuang, Brian E. Nett, Jiang Hsieh

Proceedings Volume 5745, Medical Imaging 2005: Physics of Medical Imaging; (2005) https://doi.org/10.1117/12.594694
Event: Medical Imaging, 2005, San Diego, California, United States

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.

Citation Download Citation

Guang-Hong Chen, Ranjini Tolakanahalli, Tingliang Zhuang, Brian E. Nett, and Jiang Hsieh "Exact fan-beam reconstruction via ramp-filtered backprojection and local compensation", Proc. SPIE 5745, Medical Imaging 2005: Physics of Medical Imaging, (20 April 2005); https://doi.org/10.1117/12.594694

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