Correcting versus resolving respiratory motion in free-breathing whole-heart MRA: a comparison in patients with thoracic aortic disease.

Détails

ID Serval
serval:BIB_89BA222C017B
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Titre
Correcting versus resolving respiratory motion in free-breathing whole-heart MRA: a comparison in patients with thoracic aortic disease.
Périodique
European radiology experimental
Auteur(s)
Stroud R.E., Piccini D., Schoepf U.J., Heerfordt J., Yerly J., Di Sopra L., Rollins J.D., Fischer A.M., Suranyi P., Varga-Szemes A.
ISSN
2509-9280 (Electronic)
ISSN-L
2509-9280
Statut éditorial
Publié
Date de publication
31/07/2019
Peer-reviewed
Oui
Volume
3
Numéro
1
Pages
29
Langue
anglais
Notes
Publication types: Journal Article
Publication Status: epublish
Résumé
Whole-heart magnetic resonance angiography (MRA) requires sophisticated methods accounting for respiratory motion. Our purpose was to evaluate the image quality of compressed sensing-based respiratory motion-resolved three-dimensional (3D) whole-heart MRA compared with self-navigated motion-corrected whole-heart MRA in patients with known thoracic aorta dilation.
Twenty-five patients were prospectively enrolled in this ethically approved study. Whole-heart 1.5-T MRA was acquired using a prototype 3D radial steady-state free-precession free-breathing sequence. The same data were reconstructed with a one-dimensional motion-correction algorithm (1D-MCA) and an extradimensional golden-angle radial sparse parallel reconstruction (XD-GRASP). Subjective image quality was scored and objective image quality was quantified (signal intensity ratio, SIR; vessel sharpness). Wilcoxon, McNemar, and paired t tests were used.
Subjective image quality was significantly higher using XD-GRASP compared to 1D-MCA (median 4.5, interquartile range 4.5-5.0 versus 4.0 [2.25-4.75]; p < 0.001), as well as signal homogeneity (3.0 [3.0-3.0] versus 2.0 [2.0-3.0]; p = 0.003), and image sharpness (3.0 [2.0-3.0] vs 2.0 [1.25-3.0]; p < 0.001). SIR with the 1D-MCA and XD-GRASP was 6.1 ± 3.9 versus 7.4 ± 2.5, respectively (p < 0.001); while signal homogeneity was 274.2 ± 265.0 versus 199.8 ± 67.2 (p = 0.129). XD-GRASP provided a higher vessel sharpness (45.3 ± 10.7 versus 40.6 ± 101, p = 0.025).
XD-GRASP-based motion-resolved reconstruction of free-breathing 3D whole-heart MRA datasets provides improved image contrast, sharpness, and signal homogeneity and seems to be a promising technique that overcomes some of the limitations of motion correction or respiratory navigator gating.
Mots-clé
Aorta, Dilatation, Image processing (computer–assisted), Magnetic resonance angiography, Motion
Pubmed
Open Access
Oui
Création de la notice
06/08/2019 17:14
Dernière modification de la notice
21/08/2019 6:16
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