Functional magnetic resonance imaging (fMRI) of the human brain has now become the preferred method for mapping functional pathways in the human visual cortex, among other brain regions. At ultra-high fields of 7 Tesla and above, the increased Contrast-to-Noise ratio for blood oxygenation level dependent (BOLD) techniques further facilitates this acquisition methodology. We designed and constructed a frontally open RF coil with a phased array transmit and a dense receiver array layout for human visual cortical imaging at 7 Tesla, specifically for visual fMRI experiments at sub-millimeter resolutions. We compared the coil's performance to that of a standard 32-channel whole-brain volume coil to inquire into its efficacy as a suitable substitute for the whole-brain coil for high resolution fMRI.
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