A within-coil optical prospective motion-correction system for brain imaging at 7T.
neuroimaging
optical motion correction
prospective motion correction
ultrahigh field MRI
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:
09 2020
09 2020
Historique:
received:
26
07
2019
revised:
18
01
2020
accepted:
21
01
2020
pubmed:
23
2
2020
medline:
15
5
2021
entrez:
21
2
2020
Statut:
ppublish
Résumé
Motion artifact limits the clinical translation of high-field MR. We present an optical prospective motion correction system for 7 Tesla MRI using a custom-built, within-coil camera to track an optical marker mounted on a subject. The camera was constructed to fit between the transmit-receive coils with direct line of sight to a forehead-mounted marker, improving upon prior mouthpiece work at 7 Tesla MRI. We validated the system by acquiring a 3D-IR-FSPGR on a phantom with deliberate motion applied. The same 3D-IR-FSPGR and a 2D gradient echo were then acquired on 7 volunteers, with/without deliberate motion and with/without motion correction. Three neuroradiologists blindly assessed image quality. In 1 subject, an ultrahigh-resolution 2D gradient echo with 4 averages was acquired with motion correction. Four single-average acquisitions were then acquired serially, with the subject allowed to move between acquisitions. A fifth single-average 2D gradient echo was acquired following subject removal and reentry. In both the phantom and human subjects, deliberate and involuntary motion were well corrected. Despite marked levels of motion, high-quality images were produced without spurious artifacts. The quantitative ratings confirmed significant improvements in image quality in the absence and presence of deliberate motion across both acquisitions (P < .001). The system enabled ultrahigh-resolution visualization of the hippocampus during a long scan and robust alignment of serially acquired scans with interspersed movement. We demonstrate the use of a within-coil camera to perform optical prospective motion correction and ultrahigh-resolution imaging at 7 Tesla MRI. The setup does not require a mouthpiece, which could improve accessibility of motion correction during 7 Tesla MRI exams.
Identifiants
pubmed: 32077521
doi: 10.1002/mrm.28211
pmc: PMC7263977
mid: NIHMS1552833
doi:
Types de publication
Journal Article
Research Support, N.I.H., Extramural
Research Support, Non-U.S. Gov't
Langues
eng
Sous-ensembles de citation
IM
Pagination
1661-1671Subventions
Organisme : NIBIB NIH HHS
ID : P41 EB015891
Pays : United States
Organisme : NIA NIH HHS
ID : R01 AG061120
Pays : United States
Organisme : NCRR NIH HHS
ID : S10 RR026351
Pays : United States
Organisme : NIBIB NIH HHS
ID : T32 EB009653
Pays : United States
Informations de copyright
© 2020 International Society for Magnetic Resonance in Medicine.
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