Spatial and temporal variations of flip-angle distributions in the human brain using an eight-channel parallel transmission system at 7T: comparison of three radiofrequency excitation methods.
Flip-angle variation
Magnetic resonance imaging
Parallel transmission
Ultrahigh field
Journal
Radiological physics and technology
ISSN: 1865-0341
Titre abrégé: Radiol Phys Technol
Pays: Japan
ID NLM: 101467995
Informations de publication
Date de publication:
Jun 2021
Jun 2021
Historique:
received:
14
12
2020
accepted:
04
03
2021
revised:
03
03
2021
pubmed:
13
3
2021
medline:
31
8
2021
entrez:
12
3
2021
Statut:
ppublish
Résumé
We investigated the spatial and temporal variations of flip-angle (FA) distributions in the human brain from multiple scans, using an eight-channel parallel transmission (pTx) system at 7T. Nine healthy volunteers were scanned in five sessions using three radiofrequency excitation techniques each time: circular polarization (CP), static pTx, and dynamic pTx. We calculated the coefficients of variation of the FA values within the brain area to evaluate the variations, and the maximum intersession differences in the FA values (D
Identifiants
pubmed: 33710499
doi: 10.1007/s12194-021-00612-8
pii: 10.1007/s12194-021-00612-8
doi:
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Pagination
161-166Subventions
Organisme : Japan Society for the Promotion of Science
ID : 18H00483
Organisme : Ministry of Education
ID : S1491001
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