Title

Optimized Reconstruction Algorithm For Helical Ct With Fractional Pitch Between 1Pi And 3Pi

Keywords

Biomedical imaging; Cone beam computed tomography (CT); Image reconstruction; X-ray tomography

Abstract

We propose an approximate approach to use redundant data outside the 1PI window within the exact Katsevich reconstruction framework. The proposed algorithm allows a flexible selection of the helical pitch, which is useful for clinical applications. Our idea is an extension of the one proposed by Köhler, Bontus, and Koken (2006). It is based on optimizing the contribution weights of convolution families used in exact Katsevich 3PI algorithms, so that the total weight of each Radon plane is as close to 1 as possible. Optimization is based on solving a least squares problem subject to linear constrains. Numerical evaluation shows good noise and artifact reduction properties of the proposed algorithm. © 2009 IEEE.

Publication Date

7-1-2009

Publication Title

IEEE Transactions on Medical Imaging

Volume

28

Issue

7

Number of Pages

982-990

Document Type

Article

Personal Identifier

scopus

DOI Link

https://doi.org/10.1109/TMI.2008.2008961

Socpus ID

67649496929 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/67649496929

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