RF shimming in the cervical spinal cord at 7 T.
7T
B1+
radio‐frequency
shimming
spinal cord
Journal
Magnetic resonance in medicine
ISSN: 1522-2594
Titre abrégé: Magn Reson Med
Pays: United States
ID NLM: 8505245
Informations de publication
Date de publication:
13 Aug 2024
13 Aug 2024
Historique:
revised:
29
05
2024
received:
16
02
2024
accepted:
26
06
2024
medline:
13
8
2024
pubmed:
13
8
2024
entrez:
13
8
2024
Statut:
aheadofprint
Résumé
Advancing the development of 7 T MRI for spinal cord imaging is crucial for the enhanced diagnosis and monitoring of various neurodegenerative diseases and traumas. However, a significant challenge at this field strength is the transmit field inhomogeneity. Such inhomogeneity is particularly problematic for imaging the small, deep anatomical structures of the cervical spinal cord, as it can cause uneven signal intensity and elevate the local specific absorption ratio, compromising image quality. This multisite study explores several RF shimming techniques in the cervical spinal cord. Data were collected from 5 participants between two 7 T sites with a custom 8Tx/20Rx parallel transmission coil. We explored two radiofrequency (RF) shimming approaches from an MRI vendor and four from an open-source toolbox, showcasing their ability to enhance transmit field and signal homogeneity along the cervical spinal cord. The circularly polarized (CP), coefficient of variation (CoV), and specific absorption rate (SAR) efficiency shim modes showed the highest B The study's findings highlight the potential of RF shimming to advance 7 T MRI's clinical utility for central nervous system imaging by enabling more homogenous and efficient spinal cord imaging. Additionally, the research incorporates a reproducible Jupyter Notebook, enhancing the study's transparency and facilitating peer verification.
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Subventions
Organisme : Quebec BioImaging Network
ID : 35450
Organisme : Canada Foundation for Innovation
ID : 32454
Organisme : Canada Foundation for Innovation
ID : 34824
Organisme : CIHR
ID : FDN-143263
Organisme : CIHR
ID : PJT-190258
Organisme : Fonds de Recherche du Québec - Santé
ID : 28826
Organisme : Natural Sciences and Engineering Research Council of Canada
ID : RGPIN-2019-07244
Informations de copyright
© 2024 The Author(s). Magnetic Resonance in Medicine published by Wiley Periodicals LLC on behalf of International Society for Magnetic Resonance in Medicine.
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