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  The EPI rs-fMRI signal shows an orientation effect with respect to B0 and phase-encode axis across cortical depth

Viessmann, O., Bianciardi, M., Scheffler, K., Wald, L., & Polimeni, J. (2018). The EPI rs-fMRI signal shows an orientation effect with respect to B0 and phase-encode axis across cortical depth. In Joint Annual Meeting ISMRM-ESMRMB 2018.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0001-7E23-B Version Permalink: http://hdl.handle.net/21.11116/0000-0001-937D-D
Genre: Meeting Abstract

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 Creators:
Viessmann, OM, Author
Bianciardi, M, Author
Scheffler, K1, 2, Author              
Wald, LL, Author
Polimeni, JR, Author
Affiliations:
1Max Planck Institute for Biological Cybernetics, Max Planck Society, ou_1497794              
2Department High-Field Magnetic Resonance, Max Planck Institute for Biological Cybernetics, Max Planck Society, ou_1497796              

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 Abstract: The cortex exhibits a strict vascular architecture and vessel orientation to the B0 field should impact the local susceptibility and hence the local BOLD signal. Cortical folding could thus lead to local variations in the signal. Here, we used high-resolution 7T EPI rs-fMRI data and found substantial variations of the signal amplitdude's coefficient of variation (σ/μ) with the local cortical orientation to B0. This effect was measurable throughout cortical depths with a maximised effect of +70 at the surface. We compare this to orientation-dependent blurring effects along the phase-encode axis, which we found to be significant too.

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 Dates: 2018-06
 Publication Status: Published in print
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 Identifiers: BibTex Citekey: ViessmannBSWP2018
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Title: Joint Annual Meeting ISMRM-ESMRMB 2018
Place of Event: Paris, France
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Title: Joint Annual Meeting ISMRM-ESMRMB 2018
Source Genre: Proceedings
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Pages: - Volume / Issue: - Sequence Number: 0395 Start / End Page: - Identifier: -