Accuracy and Precision of Head Motion Information in Multi-Channel Free Induction Decay Navigators for Magnetic Resonance Imaging.

Détails

ID Serval
serval:BIB_8DCD58C38847
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Titre
Accuracy and Precision of Head Motion Information in Multi-Channel Free Induction Decay Navigators for Magnetic Resonance Imaging.
Périodique
Ieee Transactions On Medical Imaging
Auteur(s)
Babayeva M., Kober T., Knowles B., Herbst M., Meuli R., Zaitsev M., Krueger G.
ISSN
1558-254X (Electronic)
ISSN-L
0278-0062
Statut éditorial
Publié
Date de publication
2015
Peer-reviewed
Oui
Volume
34
Numéro
9
Pages
1879-1889
Langue
anglais
Résumé
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 allowed us to estimate the accuracy and precision of FID navigators for quantification of rigid-body head movements. Five subjects were scanned with a 32-channel head coil array on a clinical 3T MR scanner during several resting and guided head movement periods. For each subject we trained a linear regression model based on FID navigator and optical motion tracking signals. FID-based motion model accuracy and precision was evaluated using cross-validation. FID-based prediction of rigid-body head motion was found to be with a mean translational and rotational error of 0.14±0.21 mm and 0.08±0.13(°) , respectively. Robust model training with sub-millimeter and sub-degree accuracy could be achieved using 100 data points with motion magnitudes of ±2 mm and ±1(°) for translation and rotation. The obtained linear models appeared to be subject-specific as inter-subject application of a "universal" FID-based motion model resulted in poor prediction accuracy. The results show that substantial rigid-body motion information is encoded in FID navigator signal time courses. Although, the applied method currently requires the simultaneous acquisition of FID signals and optical tracking data, the findings suggest that multi-channel FID navigators have a potential to complement existing tracking technologies for accurate rigid-body motion detection and correction in MRI.
Pubmed
Web of science
Création de la notice
05/10/2015 12:32
Dernière modification de la notice
20/08/2019 14:51
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