Effect of temporal resolution and serial autocorrelations in fast fMRI

Sahib, AK; Mathiak, K; Erb, M; Elshahabi, A; Klamer, S; Scheffler, K; Focke, N; Ethofer, T

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Meeting Abstract

Effect of temporal resolution and serial autocorrelations in fast fMRI

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Scheffler, K
Department High-Field Magnetic Resonance, Max Planck Institute for Biological Cybernetics, Max Planck Society;

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Zitation

Sahib, A., Mathiak, K., Erb, M., Elshahabi, A., Klamer, S., Scheffler, K., et al. (2016). Effect of temporal resolution and serial autocorrelations in fast fMRI. In 24th Annual Meeting and Exhibition of the International Society for Magnetic Resonance in Medicine (ISMRM 2016).

Zitierlink: https://hdl.handle.net/21.11116/0000-0000-7CE4-4

Zusammenfassung

To assess the impact of colored noise on statistics and determine optimal imaging parameters in event-related fMRI (visual stimulation using checkerboards) acquired by simultaneous multi-slice imaging enabling repetition times (TR) between 2.64 to 0.26s. Optimal statistical power was obtained for a TR of 0.33s, but short TRs required higher-order autoregressive (AR) models to achieve stable statistics. Colored noise in event-related fMRI obtained at short TRs calls for more sophisticated correction of serial autocorrelations.