Alignment of 3-dimensional cardiac structures in O-15-labeled water PET emission images with mutual information View Full Text


Ontology type: schema:ScholarlyArticle     


Article Info

DATE

2007-01

AUTHORS

Anu Juslin, Jyrki Lötjönen, Sergey V. Nesterov, Kari Kalliokoski, Juhani Knuuti, Ulla Ruotsalainen

ABSTRACT

BACKGROUND: The aim of this study was to develop a method to correct the heart position between two oxygen 15-labeled water cardiac positron emission tomography (PET) image sets to be able to use the equivalent regions of interest for the quantification of the perfusion values in the same myocardial segments. METHODS AND RESULTS: Independent component analysis was applied to the dynamic image sets (simulated phantom and 6 rest-pharmacologic stress and 10 rest-rest image sets of healthy female volunteers) acquired at different time points to separate the cardiac structures (ventricles and myocardium). The separated component images from independent component analysis from the 2 studies of the same individual were aligned with a normalized mutual information-based registration method. The alignment parameters were applied to position the regions of interest in the floating image sets for calculation of the myocardial blood flow values. In the rest case the mean myocardial blood flow value was 0.76 +/- 0.12 mL x g(-1) x min(-1) for the manual method and 0.79 +/- 0.10 mL x g(-1) x min(-1) for the proposed method (by use of the right ventricle component in the alignment), and in the stress case these values were 3.39 +/- 0.70 mL x g(-1) x min(-1) and 4.01 +/- 0.71 mL x g(-1) x min(-1), respectively. No statistically significant difference was found between the methods. CONCLUSION: In the tests with the phantom and patient images the alignment of cardiac structures was shown to be successful. The alignment could be done without the use of information from the myocardial compartment. More... »

PAGES

82-91

References to SciGraph publications

Identifiers

URI

http://scigraph.springernature.com/pub.10.1016/j.nuclcard.2006.10.020

DOI

http://dx.doi.org/10.1016/j.nuclcard.2006.10.020

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1021291553

PUBMED

https://www.ncbi.nlm.nih.gov/pubmed/17276310


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