Evaluation of the whole auditory pathway using high-resolution and functional MRI at 7T parallel-transmit.

<h4>Purpose</h4>The aim of the present study is to show a MR procedure for the evaluation of simultaneous left and right auditory functions with functional MRI, and high-resolution acquisition of anatomical auditory pathway using parallel-transmit (pTx) methods at 7T.<h4>Methods<...

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Autores principales:	Sandra Da Costa, Jérémie Clément, Rolf Gruetter, Özlem Ipek
Formato:	article
Lenguaje:	EN
Publicado:	Public Library of Science (PLoS) 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/d9709f75e9b149158653df129ef598ea
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spelling	oai:doaj.org-article:d9709f75e9b149158653df129ef598ea2021-12-02T20:04:42ZEvaluation of the whole auditory pathway using high-resolution and functional MRI at 7T parallel-transmit.1932-620310.1371/journal.pone.0254378https://doaj.org/article/d9709f75e9b149158653df129ef598ea2021-01-01T00:00:00Zhttps://doi.org/10.1371/journal.pone.0254378https://doaj.org/toc/1932-6203<h4>Purpose</h4>The aim of the present study is to show a MR procedure for the evaluation of simultaneous left and right auditory functions with functional MRI, and high-resolution acquisition of anatomical auditory pathway using parallel-transmit (pTx) methods at 7T.<h4>Methods</h4>The time-efficient MR acquisition included two steps: RF weights were optimized for the regions-of-interest and high-resolution MR images of the inner-ear were acquired for the first 30 min (400 μm-iso resolution) followed by functional MRI acquisitions along the whole auditory pathway during the next 20 minutes. Data was processed with a linear cross-correlation analysis to define frequency preferences for each voxel in the auditory relays.<h4>Results</h4>Tonotopic maps revealed ordered bilateral frequency gradients in the auditory relays whereas at the level of the cochlear nuclei and superior olivary complexes the frequency gradients were less evident. A 21% increase in transmit-field efficiency was achieved over the left/right inner-ear regions and thus its main structures were clearly discernible using the pTx methods, compared to a single transmit RF coil.<h4>Conclusion</h4>Using 7T pTx allows a fast (less than 60 min in total) and qualitative evaluation of the simultaneous left and right auditory response along the entire auditory pathway, together with high-resolution anatomical images of the inner-ear. This could be further used for patient examination at 7T.Sandra Da CostaJérémie ClémentRolf GruetterÖzlem IpekPublic Library of Science (PLoS)articleMedicineRScienceQENPLoS ONE, Vol 16, Iss 9, p e0254378 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Sandra Da Costa Jérémie Clément Rolf Gruetter Özlem Ipek Evaluation of the whole auditory pathway using high-resolution and functional MRI at 7T parallel-transmit.
description	<h4>Purpose</h4>The aim of the present study is to show a MR procedure for the evaluation of simultaneous left and right auditory functions with functional MRI, and high-resolution acquisition of anatomical auditory pathway using parallel-transmit (pTx) methods at 7T.<h4>Methods</h4>The time-efficient MR acquisition included two steps: RF weights were optimized for the regions-of-interest and high-resolution MR images of the inner-ear were acquired for the first 30 min (400 μm-iso resolution) followed by functional MRI acquisitions along the whole auditory pathway during the next 20 minutes. Data was processed with a linear cross-correlation analysis to define frequency preferences for each voxel in the auditory relays.<h4>Results</h4>Tonotopic maps revealed ordered bilateral frequency gradients in the auditory relays whereas at the level of the cochlear nuclei and superior olivary complexes the frequency gradients were less evident. A 21% increase in transmit-field efficiency was achieved over the left/right inner-ear regions and thus its main structures were clearly discernible using the pTx methods, compared to a single transmit RF coil.<h4>Conclusion</h4>Using 7T pTx allows a fast (less than 60 min in total) and qualitative evaluation of the simultaneous left and right auditory response along the entire auditory pathway, together with high-resolution anatomical images of the inner-ear. This could be further used for patient examination at 7T.
format	article
author	Sandra Da Costa Jérémie Clément Rolf Gruetter Özlem Ipek
author_facet	Sandra Da Costa Jérémie Clément Rolf Gruetter Özlem Ipek
author_sort	Sandra Da Costa
title	Evaluation of the whole auditory pathway using high-resolution and functional MRI at 7T parallel-transmit.
title_short	Evaluation of the whole auditory pathway using high-resolution and functional MRI at 7T parallel-transmit.
title_full	Evaluation of the whole auditory pathway using high-resolution and functional MRI at 7T parallel-transmit.
title_fullStr	Evaluation of the whole auditory pathway using high-resolution and functional MRI at 7T parallel-transmit.
title_full_unstemmed	Evaluation of the whole auditory pathway using high-resolution and functional MRI at 7T parallel-transmit.
title_sort	evaluation of the whole auditory pathway using high-resolution and functional mri at 7t parallel-transmit.
publisher	Public Library of Science (PLoS)
publishDate	2021
url	https://doaj.org/article/d9709f75e9b149158653df129ef598ea
work_keys_str_mv	AT sandradacosta evaluationofthewholeauditorypathwayusinghighresolutionandfunctionalmriat7tparalleltransmit AT jeremieclement evaluationofthewholeauditorypathwayusinghighresolutionandfunctionalmriat7tparalleltransmit AT rolfgruetter evaluationofthewholeauditorypathwayusinghighresolutionandfunctionalmriat7tparalleltransmit AT ozlemipek evaluationofthewholeauditorypathwayusinghighresolutionandfunctionalmriat7tparalleltransmit
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Evaluation of the whole auditory pathway using high-resolution and functional MRI at 7T parallel-transmit.

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