Document Detail


Pixel-based reconstruction (PBR) promising simultaneous techniques for CT reconstructions.
MedLine Citation:
PMID:  18218385     Owner:  NLM     Status:  In-Data-Review    
Abstract/OtherAbstract:
Algorithms belonging to the class of pixel-based reconstruction (PBR) algorithms, which are similar to simultaneous iterative reconstruction techniques (SIRTs) for reconstruction of objects from their fan beam projections in X-ray transmission tomography, are discussed. The general logic of these algorithms is discussed. Simulation studies indicate that, contrary to previous results with parallel beam projections, the iterative algebraic algorithms do not diverge when a more logical technique of obtaining the pseudoprojections is used. These simulations were carried out under conditions in which the number of object pixels exceeded (double) the number of detector pixel readings, i.e., the equations were highly underdetermined. The effect of the number of projections on the reconstruction and the convergence (empirical) to the exact solution is shown. For comparison, the reconstructions obtained by convolution backprojection are also given.
Authors:
R S Fager; K V Peddanarappagari; G N Kumar
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  IEEE transactions on medical imaging     Volume:  12     ISSN:  0278-0062     ISO Abbreviation:  IEEE Trans Med Imaging     Publication Date:  1993  
Date Detail:
Created Date:  2008-01-25     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8310780     Medline TA:  IEEE Trans Med Imaging     Country:  United States    
Other Details:
Languages:  eng     Pagination:  4-9     Citation Subset:  -    
Affiliation:
Virginia Univ., Charlottesville, VA.
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