Comparison of real-time water proton spectroscopy and echo-planar imaging sensitivity to the BOLD effect at 3 T and at 7 T.

Gradient-echo echo-planar imaging (GE EPI) is the most commonly used approach to assess localized blood oxygen level dependent (BOLD) signal changes in real-time. Alternatively, real-time spin-echo single-voxel spectroscopy (SE SVS) has recently been introduced for spatially specific BOLD neurofeedb...

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Autores principales:	Yury Koush, Mark A Elliott, Frank Scharnowski, Klaus Mathiak
Formato:	article
Lenguaje:	EN
Publicado:	Public Library of Science (PLoS) 2014
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/8a28c4fe51c041f78d16c104205b69f9
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spelling	oai:doaj.org-article:8a28c4fe51c041f78d16c104205b69f92021-11-18T08:28:50ZComparison of real-time water proton spectroscopy and echo-planar imaging sensitivity to the BOLD effect at 3 T and at 7 T.1932-620310.1371/journal.pone.0091620https://doaj.org/article/8a28c4fe51c041f78d16c104205b69f92014-01-01T00:00:00Zhttps://www.ncbi.nlm.nih.gov/pmc/articles/pmid/24614912/pdf/?tool=EBIhttps://doaj.org/toc/1932-6203Gradient-echo echo-planar imaging (GE EPI) is the most commonly used approach to assess localized blood oxygen level dependent (BOLD) signal changes in real-time. Alternatively, real-time spin-echo single-voxel spectroscopy (SE SVS) has recently been introduced for spatially specific BOLD neurofeedback at 3 T and at 7 T. However, currently it is not known how neurofeedback based on real-time SE SVS compares to real-time GE EPI-based. We therefore compared both methods at high (3 T) and at ultra-high (7 T) magnetic field strengths. We evaluated standard quality measures of both methods for signals originating from the motor cortex, the visual cortex, and for a neurofeedback condition. At 3 T, the data quality of the real-time SE SVS and GE EPI R2* estimates were comparable. At 7 T, the data quality of the real-time GE EPI acquisitions was superior compared to those of the real-time SE SVS. Despite the somehow lower data quality of real-time SE SVS compared to GE EPI at 7 T, SE SVS acquisitions might still be an interesting alternative. Real-time SE SVS allows for a direct and subject-specific T2* estimation and thus for a physiologically more plausible neurofeedback signal.Yury KoushMark A ElliottFrank ScharnowskiKlaus MathiakPublic Library of Science (PLoS)articleMedicineRScienceQENPLoS ONE, Vol 9, Iss 3, p e91620 (2014)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Yury Koush Mark A Elliott Frank Scharnowski Klaus Mathiak Comparison of real-time water proton spectroscopy and echo-planar imaging sensitivity to the BOLD effect at 3 T and at 7 T.
description	Gradient-echo echo-planar imaging (GE EPI) is the most commonly used approach to assess localized blood oxygen level dependent (BOLD) signal changes in real-time. Alternatively, real-time spin-echo single-voxel spectroscopy (SE SVS) has recently been introduced for spatially specific BOLD neurofeedback at 3 T and at 7 T. However, currently it is not known how neurofeedback based on real-time SE SVS compares to real-time GE EPI-based. We therefore compared both methods at high (3 T) and at ultra-high (7 T) magnetic field strengths. We evaluated standard quality measures of both methods for signals originating from the motor cortex, the visual cortex, and for a neurofeedback condition. At 3 T, the data quality of the real-time SE SVS and GE EPI R2* estimates were comparable. At 7 T, the data quality of the real-time GE EPI acquisitions was superior compared to those of the real-time SE SVS. Despite the somehow lower data quality of real-time SE SVS compared to GE EPI at 7 T, SE SVS acquisitions might still be an interesting alternative. Real-time SE SVS allows for a direct and subject-specific T2* estimation and thus for a physiologically more plausible neurofeedback signal.
format	article
author	Yury Koush Mark A Elliott Frank Scharnowski Klaus Mathiak
author_facet	Yury Koush Mark A Elliott Frank Scharnowski Klaus Mathiak
author_sort	Yury Koush
title	Comparison of real-time water proton spectroscopy and echo-planar imaging sensitivity to the BOLD effect at 3 T and at 7 T.
title_short	Comparison of real-time water proton spectroscopy and echo-planar imaging sensitivity to the BOLD effect at 3 T and at 7 T.
title_full	Comparison of real-time water proton spectroscopy and echo-planar imaging sensitivity to the BOLD effect at 3 T and at 7 T.
title_fullStr	Comparison of real-time water proton spectroscopy and echo-planar imaging sensitivity to the BOLD effect at 3 T and at 7 T.
title_full_unstemmed	Comparison of real-time water proton spectroscopy and echo-planar imaging sensitivity to the BOLD effect at 3 T and at 7 T.
title_sort	comparison of real-time water proton spectroscopy and echo-planar imaging sensitivity to the bold effect at 3 t and at 7 t.
publisher	Public Library of Science (PLoS)
publishDate	2014
url	https://doaj.org/article/8a28c4fe51c041f78d16c104205b69f9
work_keys_str_mv	AT yurykoush comparisonofrealtimewaterprotonspectroscopyandechoplanarimagingsensitivitytotheboldeffectat3tandat7t AT markaelliott comparisonofrealtimewaterprotonspectroscopyandechoplanarimagingsensitivitytotheboldeffectat3tandat7t AT frankscharnowski comparisonofrealtimewaterprotonspectroscopyandechoplanarimagingsensitivitytotheboldeffectat3tandat7t AT klausmathiak comparisonofrealtimewaterprotonspectroscopyandechoplanarimagingsensitivitytotheboldeffectat3tandat7t
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Comparison of real-time water proton spectroscopy and echo-planar imaging sensitivity to the BOLD effect at 3 T and at 7 T.

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