Keywords: fMRI Acquisition, fMRI Acquisition, Spiral fMRI, Keyhole Imaging
Motivation: Achieving submillimetre imaging for applications such as laminar fMRI requires balancing temporal resolution with slice coverage and demands additional in-plane acceleration.
Goal(s): Characterize and validate SpiralK in the context of submillimetre spiral fMRI.
Approach: SpiralK simulations were conducted with varying keyhole sizes and accelerations while keeping the acquisition readout time.
Results: SpiralK activation maps demonstrated improved specificity at elevated t-thresholds. Increasing keyhole size was found to decrease the specificity of the activation maps. Improved tSNR and t-value metrics were found for SpiralK compared to the other simulated acquisitions.
Impact: SpiralK shows promise for achieving submillimetre resolutions with whole-brain coverage while maintaining appropriate temporal resolution.
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