Is there an optimal respiratory reference position for self-navigated whole-heart coronary MR angiography?

Détails

ID Serval
serval:BIB_F075C8481D78
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Titre
Is there an optimal respiratory reference position for self-navigated whole-heart coronary MR angiography?
Périodique
Journal of Magnetic Resonance Imaging : Jmri
Auteur(s)
Piccini D., Bonanno G., Ginami G., Littmann A., Zenge M.O., Stuber M.
ISSN
1522-2586 (Electronic)
ISSN-L
1053-1807
Statut éditorial
Publié
Date de publication
2016
Peer-reviewed
Oui
Volume
43
Numéro
2
Pages
426-433
Langue
anglais
Résumé
PURPOSE: To test the direct influence of the reference respiratory position on image quality for self-navigated whole-heart coronary MRI.
METHODS: Self-navigated whole-heart coronary MRI was performed in 11 healthy adult subjects. Respiratory motion was compensated for by using three different respiratory reference positions of the heart: end-inspiratory, end-expiratory, and the mean of the entire respiratory excursion. All datasets were reconstructed without motion compensation for comparison. Image quality was assessed in all reconstructions using signal-to-noise ratio (SNR) and contrst-to-noise ratio (CNR) measurements, as well as percentage vessel sharpness and visible length of the coronary arteries.
RESULTS: While SNR and CNR remained close to constant in all reconstructions, a clear and significant improvement in vessel sharpness was identified in all motion corrected datasets with respect to their uncorrected counterpart (e.g., percentage sharpness of the proximal right coronary artery (RCA): 61.6 ± 8.2% for end-inspiration, 64.1 ± 10.7% for end-expiration, and 63.3 ± 7.0% for the mean respiratory position versus 55.0 ± 10.4 for the uncorrected datasets; P < 0.05). Among all motion corrected reconstructions, the use of an end-expiratory reference position most consistently provided the highest image quality. In particular, some of the improvements in vessel sharpness and length measured for end-expiration were statistically significant with respect to the reconstructions performed at end-inspiration (e.g., percentage sharpness of the proximal left anterior descending coronary: 58.2 ± 7.4% versus 55.8 ± 8.4%; P < 0.05; and visible length of the RCA: 125.7 ± 25.9 mm versus 114.4 ± 27.4 mm; P < 0.05).
CONCLUSION: The use of end-expiration as a reference position for respiratory motion correction in free-breathing self-navigated whole heart coronary MRA significantly improves image quality. J. Magn. Reson. Imaging 2016;43:426-433.
Pubmed
Web of science
Création de la notice
26/04/2016 18:08
Dernière modification de la notice
03/03/2018 22:36
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