Prospective motion and B0 shim correction for MR spectroscopy in human brain at 7T.
Magn Reson Med
; 82(6): 1984-1992, 2019 12.
Article
em En
| MEDLINE
| ID: mdl-31297889
ABSTRACT
PURPOSE:
To demonstrate feasibility and performance of prospective motion and B0 shim correction for MRS in human brain at 7T.METHODS:
Prospective motion correction using an optical camera and linear B0 shim correction using FASTMAP-like navigators were implemented into a semi-LASER sequence. The effect of motion on spectral quality was assessed without and with prospective correction in prefrontal cortex in 11 subjects.RESULTS:
Without prospective motion and shim correction, motion resulted in considerable degradation of MR spectra (broader linewidth, lower signal-to-noise ratio, degraded water suppression). With prospective motion and shim correction, spectral quality remained excellent despite motion. Prospective motion correction alone was not sufficient to prevent degradation of spectral quality.CONCLUSION:
Prospective motion and B0 shim correction is feasible at 7T and should help improve the robustness of MRS, particularly in motion-prone populations.Palavras-chave
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Processamento de Imagem Assistida por Computador
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Encéfalo
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Espectroscopia de Ressonância Magnética
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Movimento (Física)
Limite:
Adult
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Aged
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Female
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Humans
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Male
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Middle aged
Idioma:
En
Revista:
Magn Reson Med
Assunto da revista:
DIAGNOSTICO POR IMAGEM
Ano de publicação:
2019
Tipo de documento:
Article