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@article{1836843,
author = {Kovářová, Anežka and Gajdoš, Martin and Rektor, Ivan and Mikl, Michal},
article_location = {USA},
article_number = {3},
doi = {http://dx.doi.org/10.1002/hbm.25698},
keywords = {acquisition acceleration; BOLD; multi-echo fMRI; simultaneous multi-slice imaging; TE dependence},
language = {eng},
issn = {1065-9471},
journal = {Human Brain mapping},
title = {Contribution of the multi-echo approach in accelerated functional magnetic resonance imaging multiband acquisition},
url = {https://onlinelibrary.wiley.com/doi/10.1002/hbm.25698},
volume = {43},
year = {2022}
}
TY - JOUR
ID - 1836843
AU - Kovářová, Anežka - Gajdoš, Martin - Rektor, Ivan - Mikl, Michal
PY - 2022
TI - Contribution of the multi-echo approach in accelerated functional magnetic resonance imaging multiband acquisition
JF - Human Brain mapping
VL - 43
IS - 3
SP - 955-973
EP - 955-973
PB - WILEY
SN - 10659471
KW - acquisition acceleration
KW - BOLD
KW - multi-echo fMRI
KW - simultaneous multi-slice imaging
KW - TE dependence
UR - https://onlinelibrary.wiley.com/doi/10.1002/hbm.25698
N2 - We wanted to verify the effect of combining multi-echo (ME) functional magnetic resonance imaging (fMRI) with slice acceleration in simultaneous multi-slice acquisition. The aim was to shed light on the benefits of multiple echoes for various acquisition settings, especially for levels of slice acceleration and flip angle. Whole-brain ME fMRI data were obtained from 26 healthy volunteers (using three echoes; seven runs with slice acceleration 1, 4, 6, and 8; and two different flip angles for each of the first three acceleration factors) and processed as single-echo (SE) data and ME data based on optimal combinations weighted by the contrast-to-noise ratio. Global metrics (temporal signal-to-noise ratio, signal-to-noise separation, number of active voxels, etc.) and local characteristics in regions of interest were used to evaluate SE and ME data. ME results outperformed SE results in all runs; the differences became more apparent for higher acceleration, where a significant decrease in data quality is observed. ME fMRI can improve the observed data quality metrics over SE fMRI for a wide range of accelerated fMRI acquisitions.
ER -
KOVÁŘOVÁ, Anežka, Martin GAJDOŠ, Ivan REKTOR and Michal MIKL. Contribution of the multi-echo approach in accelerated functional magnetic resonance imaging multiband acquisition. \textit{Human Brain mapping}. USA: WILEY, 2022, vol.~43, No~3, p.~955-973. ISSN~1065-9471. Available from: https://dx.doi.org/10.1002/hbm.25698.
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