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  Spatial Dependence of the Nonlinear BOLD Response at Short Stimulus Duration

Pfeuffer, J., McCullough, J., Van de Moortele, P.-F., Ugurbil, K., & Hu, X. (2002). Spatial Dependence of the Nonlinear BOLD Response at Short Stimulus Duration. In 10th Scientific Meeting of the International Society of Magnetic Resonance in Medicine (ISMRM 2002).

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0013-DFE4-E Version Permalink: http://hdl.handle.net/21.11116/0000-0005-A55E-8
Genre: Meeting Abstract

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https://cds.ismrm.org/ismrm-2002/START.pdf (Table of contents)
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 Creators:
Pfeuffer, J1, Author              
McCullough , JC, Author
Van de Moortele , P-F, Author
Ugurbil, K, Author
Hu, X, Author
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1External Organizations, ou_persistent22              

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 Abstract: Non-linearities in the measured BOLD data were found for the response integral and width. With the high sensitivity at 7T, a voxel-based analysis was feasible and was used to investigate the spatial dependence of the non-linearities at high spatial resolution. Correlation between response onset and non-linearity suggests that the origin of the observations are a tissue-specific phenomenon. Comparison with 4T and 1.5T data also indicates a field dependence. The observed non-linearity at short stimulus duration (SD) has likely a considerable hemodynamic contribution and thus must be accounted for in event-related fMRI paradigms.

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 Dates: 2002-05
 Publication Status: Published in print
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 Identifiers: BibTex Citekey: 1223
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Title: 10th Scientific Meeting of the International Society of Magnetic Resonance in Medicine (ISMRM 2002)
Place of Event: Honolulu, HI, USA
Start-/End Date: 2002-05-18 - 2002-05-24

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Title: 10th Scientific Meeting of the International Society of Magnetic Resonance in Medicine (ISMRM 2002)
Source Genre: Proceedings
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Pages: - Volume / Issue: - Sequence Number: 7 Start / End Page: - Identifier: -