Accelerated and high-resolution cardiac T<sub>2</sub> mapping through peripheral k-space sharing.

Détails

ID Serval
serval:BIB_6FF60768689C
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Titre
Accelerated and high-resolution cardiac T<sub>2</sub> mapping through peripheral k-space sharing.
Périodique
Magnetic resonance in medicine
Auteur(s)
Darçot E., Yerly J., Colotti R., Masci P.G., Chaptinel J., Feliciano H., Bianchi V., van Heeswijk R.B.
ISSN
1522-2594 (Electronic)
ISSN-L
0740-3194
Statut éditorial
Publié
Date de publication
01/2019
Peer-reviewed
Oui
Volume
81
Numéro
1
Pages
220-233
Langue
anglais
Notes
Publication types: Journal Article ; Research Support, Non-U.S. Gov't
Publication Status: ppublish
Résumé
To develop high-spatial-resolution cardiac T <sub>2</sub> mapping that allows for a reduced acquisition time while maintaining its precision. We implemented and optimized a new golden-angle radial T <sub>2</sub> mapping technique named SKRATCH (Shared k-space Radial T <sub>2</sub> Characterization of the Heart) that shares k-space peripheries of T <sub>2</sub> -weighted images while preserving their contrasts.
Six SKRATCH variants (gradient-recalled echo and balanced SSFP, free-breathing and breath-held, with and without a saturation preparation) were implemented, and their precision was compared with a navigator-gated reference technique in phantoms and 22 healthy volunteers at 3 T. The optimal breath-held SKRATCH technique was applied in a small cohort of patients with subacute myocardial infarction.
The faster free-breathing SKRATCH technique reduced the acquisition time by 52.4%, while maintaining the precision and spatial resolution of the reference technique. Similarly, the most precise and robust breath-held SKRATCH technique demonstrated homogenous T <sub>2</sub> values that did not significantly differ from the navigator-gated reference (T <sub>2</sub> = 39.9 ± 3.4 ms versus 39.5 ± 3.4 ms, P > .20, respectively). All infarct patients demonstrated a large T <sub>2</sub> elevation in the ischemic regions of the myocardium.
The optimized SKRATCH technique enabled the accelerated acquisition of high-spatial-resolution T <sub>2</sub> maps, was validated in healthy adult volunteers, and was successfully applied to a small initial group of patients.
Mots-clé
Adult, Aged, Algorithms, Breath Holding, Contrast Media, Electrocardiography, Female, Healthy Volunteers, Heart/diagnostic imaging, Humans, Image Interpretation, Computer-Assisted/methods, Image Processing, Computer-Assisted, Magnetic Resonance Imaging, Male, Middle Aged, Models, Theoretical, Myocardial Infarction/diagnostic imaging, Myocardium, Observer Variation, Phantoms, Imaging, Reproducibility of Results, Respiration, Translational Medical Research, Young Adult, KWIC filter, T2 mapping, heart, high spatial resolution, infarction, radial imaging
Pubmed
Web of science
Open Access
Oui
Création de la notice
07/08/2018 9:43
Dernière modification de la notice
04/01/2020 6:17
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