A simulation based image reconstruction strategy with predictable image quality in limited-angle x-ray tomography

Shiyu Xu; Ying Chen

doi:10.1117/12.2007976

6 March 2013 A simulation based image reconstruction strategy with predictable image quality in limited-angle x-ray tomography

Shiyu Xu, Ying Chen

Author Affiliations +

Proceedings Volume 8668, Medical Imaging 2013: Physics of Medical Imaging; 86685P (2013) https://doi.org/10.1117/12.2007976
Event: SPIE Medical Imaging, 2013, Lake Buena Vista (Orlando Area), Florida, United States

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.

Citation Download Citation

Shiyu Xu and Ying Chen "A simulation based image reconstruction strategy with predictable image quality in limited-angle x-ray tomography", Proc. SPIE 8668, Medical Imaging 2013: Physics of Medical Imaging, 86685P (6 March 2013); https://doi.org/10.1117/12.2007976

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