PMID: 16532955Mar 15, 2006Paper

Development and evaluation of an exact fan-beam reconstruction algorithm using an equal weighting scheme via locally compensated filtered backprojection (LCFBP)

Medical Physics
Guang-Hong ChenJiang Hsieh

Abstract

A novel exact fan-beam image reconstruction formula is presented and validated using both phantom data and clinical data. This algorithm takes the form of the standard ramp filtered backprojection (FBP) algorithm plus local compensation terms. This algorithm will be referred to as a locally compensated filtered backprojection (LCFBP). 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 (2pi), the short scan mode (pi+ full fan angle), and the supershort scan mode [less than (pi+ full fan angle)]. Another desirable feature of this algorithm is that it is derivative-free. This feature is beneficial in preserving the spatial resolution of the reconstructed images. The third feature is that an equal weighting scheme has been utilized in the algorithm, thus the new algorithm has better noise properties than the standard filtered backprojection image reconstruction with a smooth weighting function. Both phantom data and clinical data were utilized to validate the algorithm and demonstrate the superior noise properties of the new algorithm.

References

Nov 1, 1990·Medical Physics·C R Crawford, K F King
Mar 1, 1982·Medical Physics·D L Parker
Sep 1, 1981·Medical Physics·D L ParkerJ H Stanley
Aug 13, 2002·Physics in Medicine and Biology·Frédéric NooHiroyuki Kudo
Jul 11, 2003·Medical Physics·Guang-Hong Chen
Oct 29, 2004·Physics in Medicine and Biology·Xiaochuan PanLifeng Yu
Feb 24, 2005·Physics in Medicine and Biology·Tingliang ZhuangGuang-Hong Chen

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Citations

Apr 22, 2008·Physics in Medicine and Biology·Adam Wunderlich, Frédéric Noo
Jun 21, 2012·Physics in Medicine and Biology·Zhicong YuJoachim Hornegger
Dec 19, 2013·Computational and Mathematical Methods in Medicine·Mou An, Yaoqin Xie
May 17, 2007·Physics in Medicine and Biology·Frank DennerleinGünter Lauritsch
Mar 1, 2007·Physics in Medicine and Biology·Ge WangHengyong Yu

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