Document Detail

Maximum-likelihood estimation of detector response for PET image reconstruction.
MedLine Citation:
PMID:  17946519     Owner:  NLM     Status:  MEDLINE    
An accurate system model is essential for reconstructing high-resolution images. While the system response of a positron emission tomography (PET) system can be measured directly, the process is often difficult to perform and time-consuming. Here we propose a maximum likelihood method for estimating the detector response from projections of a point source at a set of radial locations in the field of view. The detector response functions for all radial bins are estimated simultaneously. No interpolation is required. Compared to the method of direct measurement, the proposed approach requires less measurements and results in sparse system matrix because a factored system matrix is used, which reduces the reconstruction time. We conducted computer simulation to demonstrate the feasibility of the proposed method.
Jinyi Qi
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Publication Detail:
Type:  Journal Article; Research Support, N.I.H., Extramural    
Journal Detail:
Title:  Conference proceedings : ... Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and Biology Society. Annual Conference     Volume:  1     ISSN:  1557-170X     ISO Abbreviation:  Conf Proc IEEE Eng Med Biol Soc     Publication Date:  2006  
Date Detail:
Created Date:  2007-10-23     Completed Date:  2008-03-13     Revised Date:  2014-09-15    
Medline Journal Info:
Nlm Unique ID:  101243413     Medline TA:  Conf Proc IEEE Eng Med Biol Soc     Country:  United States    
Other Details:
Languages:  eng     Pagination:  2530-3     Citation Subset:  IM    
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MeSH Terms
Artificial Intelligence*
Image Enhancement / methods*
Image Interpretation, Computer-Assisted / methods*
Likelihood Functions
Pattern Recognition, Automated / methods*
Phantoms, Imaging
Positron-Emission Tomography / instrumentation,  methods*
Reproducibility of Results
Sensitivity and Specificity
Grant Support
R01 EB000194/EB/NIBIB NIH HHS; R01 EB000194/EB/NIBIB NIH HHS; R01 EB000194-01A1/EB/NIBIB NIH HHS; R01 EB000194-02/EB/NIBIB NIH HHS; R01 EB000194-03/EB/NIBIB NIH HHS; R01 EB000194-04/EB/NIBIB NIH HHS; R01 EB000194-05/EB/NIBIB NIH HHS

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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