Nonenhanced arterial spin labeled carotid MR angiography using three-dimensional radial balanced steady-state free precession imaging.

Détails

ID Serval
serval:BIB_C759F8E2C4F0
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Titre
Nonenhanced arterial spin labeled carotid MR angiography using three-dimensional radial balanced steady-state free precession imaging.
Périodique
Journal of Magnetic Resonance Imaging
Auteur(s)
Koktzoglou I., Meyer J.R., Ankenbrandt W.J., Giri S., Piccini D., Zenge M.O., Flanagan O., Desai T., Gupta N., Edelman R.R.
ISSN
1522-2586 (Electronic)
ISSN-L
1053-1807
Statut éditorial
Publié
Date de publication
2015
Peer-reviewed
Oui
Volume
41
Numéro
4
Pages
1150-1156
Langue
anglais
Notes
Publication types: Journal Article Publication Status: ppublish
Résumé
PURPOSE: To optimize and preliminarily evaluate a three-dimensional (3D) radial balanced steady-state free precession (bSSFP) arterial spin labeled (ASL) sequence for nonenhanced MR angiography (MRA) of the extracranial carotid arteries.
MATERIALS AND METHODS: The carotid arteries of 13 healthy subjects and 2 patients were imaged on a 1.5 Tesla MRI system using an undersampled 3D radial bSSFP sequence providing a scan time of ∼4 min and 1 mm(3) isotropic resolution. A hybridized scheme that combined pseudocontinuous and pulsed ASL was used to maximize arterial coverage. The impact of a post label delay period, the sequence repetition time, and radiofrequency (RF) energy configuration of pseudocontinuous labeling on the display of the carotid arteries was assessed with contrast-to-noise ratio (CNR) measurements. Faster, higher undersampled 2 and 1 min scans were tested.
RESULTS: Using hybridized ASL MRA and a 3D radial bSSFP trajectory, arterial CNR was maximized with a post label delay of 0.2 s, repetition times ≥ 2.5 s (P < 0.05), and by eliminating RF energy during the pseudocontinuous control phase (P < 0.001). With higher levels of undersampling, the carotid arteries were displayed in ≤ 2 min.
CONCLUSION: Nonenhanced MRA using hybridized ASL with a 3D radial bSSFP trajectory can display long lengths of the carotid arteries with 1 mm(3) isotropic resolution. J. Magn. Reson. Imaging 2015;41:1150-1156. © 2014 Wiley Periodicals, Inc.
Pubmed
Web of science
Création de la notice
18/04/2015 13:27
Dernière modification de la notice
03/03/2018 21:19
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