A non-contrast self-navigated 3-dimensional MR technique for aortic root and vascular access route assessment in the context of transcatheter aortic valve replacement: proof of concept.

Détails

ID Serval
serval:BIB_07DCA3B72A77
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Titre
A non-contrast self-navigated 3-dimensional MR technique for aortic root and vascular access route assessment in the context of transcatheter aortic valve replacement: proof of concept.
Périodique
European Radiology
Auteur(s)
Renker M., Varga-Szemes A., Schoepf U.J., Baumann S., Piccini D., Zenge M.O., Rehwald W.G., Müller E., Rier J.D., Möllmann H., Hamm C.W., Steinberg D.H., De Cecco C.N.
ISSN
1432-1084 (Electronic)
ISSN-L
0938-7994
Statut éditorial
Publié
Date de publication
2016
Peer-reviewed
Oui
Volume
26
Numéro
4
Pages
951-958
Langue
anglais
Notes
Publication types: Evaluation Studies ; Journal Article
Publication Status: ppublish
Résumé
OBJECTIVES: Due to the high prevalence of renal failure in transcatheter aortic valve replacement (TAVR) candidates, a non-contrast MR technique is desirable for pre-procedural planning. We sought to evaluate the feasibility of a novel, non-contrast, free-breathing, self-navigated three-dimensional (SN3D) MR sequence for imaging the aorta from its root to the iliofemoral run-off in comparison to non-contrast two-dimensional-balanced steady-state free-precession (2D-bSSFP) imaging.
METHODS: SN3D [field of view (FOV), 220-370 mm(3); slice thickness, 1.15 mm; repetition/echo time (TR/TE), 3.1/1.5 ms; and flip angle, 115°] and 2D-bSSFP acquisitions (FOV, 340 mm; slice thickness, 6 mm; TR/TE, 2.3/1.1 ms; flip angle, 77°) were performed in 10 healthy subjects (all male; mean age, 30.3 ± 4.3 yrs) using a 1.5-T MRI system. Aortic root measurements and qualitative image ratings (four-point Likert-scale) were compared.
RESULTS: The mean effective aortic annulus diameter was similar for 2D-bSSFP and SN3D (26.7 ± 0.7 vs. 26.1 ± 0.9 mm, p = 0.23). The mean image quality of 2D-bSSFP (4; IQR 3-4) was rated slightly higher (p = 0.03) than SN3D (3; IQR 2-4). The mean total acquisition time for SN3D imaging was 12.8 ± 2.4 min.
CONCLUSIONS: Our results suggest that a novel SN3D sequence allows rapid, free-breathing assessment of the aortic root and the aortoiliofemoral system without administration of contrast medium.
KEY POINTS: • The prevalence of renal failure is high among TAVR candidates. • Non-contrast 3D MR angiography allows for TAVR procedure planning. • The self-navigated sequence provides a significantly reduced scanning time.
Mots-clé
Adult, Aortic Valve/pathology, Aortic Valve/surgery, Aortic Valve Stenosis/pathology, Aortic Valve Stenosis/surgery, Contrast Media, Feasibility Studies, Healthy Volunteers, Humans, Imaging, Three-Dimensional, Magnetic Resonance Angiography/methods, Magnetic Resonance Imaging, Interventional/methods, Male, Prospective Studies, Transcatheter Aortic Valve Replacement/methods
Pubmed
Web of science
Création de la notice
05/04/2016 17:50
Dernière modification de la notice
03/03/2018 13:28
Données d'usage