HiHi fMRI: A data-reordering method for measuring the hemodynamic response of 
the brain with high temporal resolution and high SNR

Nagy, Zoltan; Hutton, Chloe; David, Gergely; Hinterholzer, Natalie; Deichmann, Ralf; Weiskopf, Nikolaus; Vannesjo, S. Johanna

doi:10.1093/cercor/bhac364

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HiHi fMRI: A data-reordering method for measuring the hemodynamic response of the brain with high temporal resolution and high SNR

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Weiskopf, Nikolaus
Wellcome Centre for Human Neuroimaging, UCL Queen Square Institute of Neurology, University College London, United Kingdom;
Department Neurophysics (Weiskopf), MPI for Human Cognitive and Brain Sciences, Max Planck Society;

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Citation

Nagy, Z., Hutton, C., David, G., Hinterholzer, N., Deichmann, R., Weiskopf, N., et al. (2023). HiHi fMRI: A data-reordering method for measuring the hemodynamic response of the brain with high temporal resolution and high SNR. Cerebral Cortex, 33(8), 4606-4611. doi:10.1093/cercor/bhac364.

Cite as: https://hdl.handle.net/21.11116/0000-000B-2EE0-5

Abstract

There is emerging evidence that sampling the blood-oxygen-level-dependent (BOLD) response with high temporal resolution opens up new avenues to study the in vivo functioning of the human brain with functional magnetic resonance imaging. Because the speed of sampling and the signal level are intrinsically connected in magnetic resonance imaging via the T1 relaxation time, optimization efforts usually must make a trade-off to increase the temporal sampling rate at the cost of the signal level. We present a method, which combines a sparse event-related stimulus paradigm with subsequent data reshuffling to achieve high temporal resolution while maintaining high signal levels (HiHi). The proof-of-principle is presented by separately measuring the single-voxel time course of the BOLD response in both the primary visual and primary motor cortices with 100-ms temporal resolution.