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Proceedings Paper

A simulation based image reconstruction strategy with predictable image quality in limited-angle x-ray tomography
Author(s): Shiyu Xu; Ying Chen
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Paper Abstract

This paper presents a Pre-computed BackProjection (BP) based Penalized-likelihood (PPL) method for limited­ angle X-ray tomography based on the theory of resolution properties of regularized image reconstruction. Pre­ computed BP based penalty is a simplified version of the modified quadratic penalty proposed in the literature. 1 By inserting a BP equivalent estimation into a quadratic penalty, the data-related terms in the impulse response and noise reconstructed by PPL are absorbed, such that the effects of smoothing parameter of the penalty can be evaluated in advance through the simulated data. A simulation based two-step procedure is proposed to apply PPL method in real applications. It reconstructs images with predictable resolution properties by choosing a corresponding smoothing parameter. The effectiveness and robustness of the two-step strategy is validated through simulation based experiments.

Paper Details

Date Published: 6 March 2013
PDF: 7 pages
Proc. SPIE 8668, Medical Imaging 2013: Physics of Medical Imaging, 86685P (6 March 2013); doi: 10.1117/12.2007976
Show Author Affiliations
Shiyu Xu, Southern Illinois Univ. Carbondale (United States)
Ying Chen, Southern Illinois Univ. Carbondale (United States)

Published in SPIE Proceedings Vol. 8668:
Medical Imaging 2013: Physics of Medical Imaging
Robert M. Nishikawa; Bruce R. Whiting; Christoph Hoeschen, Editor(s)

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