Four-dimensional respiratory motion-resolved whole heart coronary MR angiography.

Détails

ID Serval
serval:BIB_A2E839D4AD94
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Titre
Four-dimensional respiratory motion-resolved whole heart coronary MR angiography.
Périodique
Magnetic resonance in medicine
Auteur(s)
Piccini D., Feng L., Bonanno G., Coppo S., Yerly J., Lim R.P., Schwitter J., Sodickson D.K., Otazo R., Stuber M.
ISSN
1522-2594 (Electronic)
ISSN-L
0740-3194
Statut éditorial
Publié
Date de publication
04/2017
Peer-reviewed
Oui
Volume
77
Numéro
4
Pages
1473-1484
Langue
anglais
Notes
Publication types: Journal Article
Publication Status: ppublish
Résumé
Free-breathing whole-heart coronary MR angiography (MRA) commonly uses navigators to gate respiratory motion, resulting in lengthy and unpredictable acquisition times. Conversely, self-navigation has 100% scan efficiency, but requires motion correction over a broad range of respiratory displacements, which may introduce image artifacts. We propose replacing navigators and self-navigation with a respiratory motion-resolved reconstruction approach.
Using a respiratory signal extracted directly from the imaging data, individual signal-readouts are binned according to their respiratory states. The resultant series of undersampled images are reconstructed using an extradimensional golden-angle radial sparse parallel imaging (XD-GRASP) algorithm, which exploits sparsity along the respiratory dimension. Whole-heart coronary MRA was performed in 11 volunteers and four patients with the proposed methodology. Image quality was compared with that obtained with one-dimensional respiratory self-navigation.
Respiratory-resolved reconstruction effectively suppressed respiratory motion artifacts. The quality score for XD-GRASP reconstructions was greater than or equal to self-navigation in 80/88 coronary segments, reaching diagnostic quality in 61/88 segments versus 41/88. Coronary sharpness and length were always superior for the respiratory-resolved datasets, reaching statistical significance (P < 0.05) in most cases.
XD-GRASP represents an attractive alternative for handling respiratory motion in free-breathing whole heart MRI and provides an effective alternative to self-navigation. Magn Reson Med 77:1473-1484, 2017. © 2016 International Society for Magnetic Resonance in Medicine.

Mots-clé
Adult, Aged, Algorithms, Artifacts, Coronary Angiography/methods, Coronary Artery Disease/diagnostic imaging, Coronary Artery Disease/pathology, Coronary Vessels/diagnostic imaging, Coronary Vessels/pathology, Female, Humans, Image Enhancement/methods, Image Interpretation, Computer-Assisted/methods, Magnetic Resonance Angiography/methods, Male, Middle Aged, Reproducibility of Results, Respiratory Mechanics, Respiratory-Gated Imaging Techniques/methods, Sensitivity and Specificity, compressed sensing, coronary MRA, free breathing, motion correction, self-navigation, sparse reconstruction
Pubmed
Web of science
Création de la notice
28/04/2017 12:35
Dernière modification de la notice
20/08/2019 16:08
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