Motion artifact correction in MRI using generalized projections

Motion artifact correction in MRI using generalized projections

An algorithm that suppresses translational motion artifacts in magnetic resonance imaging (MRI) by using post processing on a standard spin-warp image is presented. It is shown that translational motion causes an additional phase factor in the detected signal and that this phase error can be removed...

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Veröffentlicht in:IEEE transactions on medical imaging 1991-03, Vol.10 (1), p.40-46
Hauptverfasser: Hedley, M., Yan, H., Rosenfeld, D.
Format: Artikel
Sprache:eng
Schlagworte:
Biological and medical sciences
Biomedical monitoring
Computer errors
Data acquisition
Investigative techniques, diagnostic techniques (general aspects)
Iterative algorithms
Magnetic resonance imaging
Medical sciences
Motion detection
Phase detection
Radio frequency
Signal detection
Testing
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Beschreibung
Zusammenfassung:An algorithm that suppresses translational motion artifacts in magnetic resonance imaging (MRI) by using post processing on a standard spin-warp image is presented. It is shown that translational motion causes an additional phase factor in the detected signal and that this phase error can be removed using an iterative algorithm of generalized projections. The method has been tested using computer simulations and it successfully removed most of the artifact. The algorithm converges even in the presence of severe noise.< >
ISSN:0278-0062
1558-254X
DOI:10.1109/42.75609