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Title: An implanted 8-channel array coil for high-resolution macaque MRI at 3T
Authors: Janssens, Thomas ×
Keil, Boris
Farivar, Reza
McNab, Jennifer A
Polimeni, Jonathan R
Gerits, Annelies
Arsenault, John
Wald, Lawrence L
Vanduffel, Wim #
Issue Date: Sep-2012
Publisher: Academic Press
Series Title: NeuroImage vol:62 issue:3 pages:1529-1536
Abstract: An 8-channel receive coil array was constructed and implanted adjacent to the skull in a male rhesus monkey in
order to improve the sensitivity of (functional) brain imaging. The permanent implant was part of an acrylic
headpost assembly and only the coil element loop wires were implanted. The tuning, matching, and preamplifier
circuitry was connected via a removable external assembly. Signal-to-noise ratio (SNR) and noise amplification
for parallel imaging were compared to single-, 4-, and 8-channel external receive-only coils routinely used for
macaque fMRI. In vivo measurements showed significantly improved SNR within the brain for the implanted
versus the external coils. Within a region-of-interest covering the cerebral cortex, we observed a 5.4-, 3.6-fold,
and 3.4-fold increase in SNR compared to the external single-, 4-, and 8-channel coils, respectively. In the center
of the brain, the implanted array maintained a 2.4×, 2.5×, and 2.1× higher SNR, respectively compared to the external
coils. The array performance was evaluated for anatomical, diffusion tensor and functional brain imaging.
This study suggests that a stable implanted phased-array coil can be used in macaque MRI to substantially increase
the spatial resolution for anatomical, diffusion tensor, and functional imaging.
ISSN: 1053-8119
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Research Group Neurophysiology
Laboratory for Neuro- and Psychofysiology
× corresponding author
# (joint) last author

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