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Free induction decay (FID) navigators were found to qualitatively detect rigid-body head movements, yet it is unknown to what extent they can provide quantitative motion estimates. Here, we acquired FID navigators at different sampling rates and simultaneously measured head movements using a highly accurate optical motion tracking system. This strategy(More)
Exemplary FIDnav signal with extrapolated motion trajectories (top) for translational (middle) and rotational motion (bottom). (b) Sagittal view from one subject before and after correction after performing translations in head-foot direction. Target Audience: MR engineers, physicists, and clinicians interested in motion correction. Introduction In-vivo(More)
Axial views of motion correction results for head shaking; (b) Changes in volumetric measurements and image quality due to motion correction). The p-value is shown as calculated with the Wilcoxon rank-sum test when comparing the volumes with and without correction. INTRODUCTION: The aim of this study is to show the potential of combining short(More)
Introduction Subject head motion during long scans is one of the major sources of image artifacts in MR brain imaging. Although advances in parallel imaging techniques allow reducing the scan time significantly, it still remains in the order of minutes, increasing the probability of head motion to occur. Motion during the acquisition leads to inconsistent(More)
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