Two motion-detection algorithms for projection-reconstruction magnetic resonance imaging: theory and experimental verification.
In this paper, projection-reconstruction (PR) magnetic resonance (MR) imaging is considered. We present two new quantitative techniques that allow to check when motion was present during a PR MR experiment. No a priori information about the motion is required since only the measured MR signals are used in the calculations. Moreover, the proposed methods can be implemented on a standard personal computer or workstation. It is experimentally shown that both methods are able to detect motion intervals with an accuracy of one repetition time.
Department of Electronics and Information Systems, University of Ghent, Belgium. rik.vandewalle@rug.ac.be
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Van de Walle
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Lemahieu
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Achten
D016477:Artifacts; D001921:Brain / Q000033:anatomy & histology; D006801:Humans; D007091:Image Processing, Computer-Assisted / Q000379:methods*; D008279:Magnetic Resonance Imaging; D009068:Movement