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.
Van de Walle
R
R
Department of Electronics and Information Systems, University of Ghent, Belgium. rik.vandewalle@rug.ac.be
Lemahieu
I
I
Achten
E
E
D016477:Artifacts; D001921:Brain / Q000033:anatomy & histology; D006801:Humans; D007091:Image Processing, Computer-Assisted / Q000379:methods*; D008279:Magnetic Resonance Imaging; D009068:Movement