Functional MRI of large-scale brain networks involved in motor control using parallel transmission at 7 Tesla
Yidi Lu1, Chia-Yin Wu1,2,3, Shota Hodono1,2, Jin Jin2,4, David Reutens1,2, and Martijn A Cloos1,2
1Centre for Advanced Imaging, The University of Queensland, Brisbane, Australia, 2ARC Training Centre for Innovation in Biomedical Imaging Technology, The University of Queensland, Brisbane, Australia, 3School of Information Technology and Electrical Engineering, The University of Queensland, Brisbane, Australia, 4Siemens Healthcare Pty Ltd, Brisbane, Australia
The standing wave artefact affects SNR and contrast of the images in Ultra-high field (UHF) functional magnetic resonance imaging (fMRI). One way to mitigate this effect is to use parallel transmission (pTx). In this study, we evaluate the benefits of pTx for studies that investigate large-scale brain networks involved in motor control. We show that, compared to the standard circularly polarized (CP) mode, activation patterns in the posterior lobule of the cerebellum, produced by a coordinated finger flexion-extension task in both hands, are better captured using subject-specific pTx pulses.
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