DocumentCode
1528764
Title
Ghost cancellation algorithms for MRI images
Author
Zakhor, Avideh
Author_Institution
Dept. of Electr. Eng., California Univ., Berkeley, CA, USA
Volume
9
Issue
3
fYear
1990
fDate
9/1/1990 12:00:00 AM
Firstpage
318
Lastpage
326
Abstract
Ghost cancellation algorithms for restoring magnetic resonance imaging (MRI) images in medical applications are described. The approach is to model the effect of the time delays and the asymmetry of the sinusoidal readout gradient for even and odd lines with two phase functions relating the actual object density to even and odd parts of the observed image. A priori information about the phase functions is exploited in order to estimate the true object density. Examples of applying this ghost cancellation approach to liver and heart images is presented
Keywords
biomedical NMR; patient diagnosis; picture processing; NMR images; ghost cancellation algorithms; heart images; liver images; medical diagnostic imaging; object density; phase functions; sinusoidal readout gradient asymmetry; time delays; Biomedical imaging; Data acquisition; Delay effects; Heart; Image reconstruction; Image restoration; Liver; Magnetic resonance imaging; Phase estimation; Spirals;
fLanguage
English
Journal_Title
Medical Imaging, IEEE Transactions on
Publisher
ieee
ISSN
0278-0062
Type
jour
DOI
10.1109/42.57770
Filename
57770
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