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  A qualitative test of the balloon model for BOLD-based MR signal changes at 3T

Mildner, T., Norris, D. G., Schwarzbauer, C., & Wiggins, C. J. (2001). A qualitative test of the balloon model for BOLD-based MR signal changes at 3T. Magnetic Resonance in Medicine, 46(5), 891-899. doi:10.1002/mrm.1274.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0010-9DD1-C Version Permalink: http://hdl.handle.net/11858/00-001M-0000-002C-5BCC-1
Genre: Journal Article

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 Creators:
Mildner, Toralf1, Author              
Norris, David G.1, Author              
Schwarzbauer, Christian1, Author              
Wiggins, Christopher J.1, Author              
Affiliations:
1MPI of Cognitive Neuroscience (Leipzig, -2003), The Prior Institutes, MPI for Human Cognitive and Brain Sciences, Max Planck Society, ou_634574              

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 Abstract: The aim of this study was to adapt the balloon model for BOLD-based MR signal changes to a magnetic field strength of 3T and to examine its validity. The simultaneous measurement of BOLD and diffusion-weighted BOLD responses was performed. The amplitude of the BOLD peak was found to be similar for all subjects when a short visual stimulus of 6 sec was used. The rise-time to the BOLD peak and the shape and depth of the poststimulus undershoot varied significantly. A fit of the experimental BOLD responses was found to be possible by use of parameters within a reasonable physiological range. The relations between these parameters and their influence on the modeled BOLD responses is discussed. A prediction of the balloon model is the occurrence of a BOLD overshoot, i.e., a lag between the changes of the blood volume and the blood flow after the start of the stimulation. Experimental evidence for the existence of a BOLD overshoot is presented.

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Language(s): eng - English
 Dates: 2001
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Method: -
 Identifiers: eDoc: 239387
ISI: 000171821100008
Other: P6847
DOI: 10.1002/mrm.1274
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Title: Magnetic Resonance in Medicine
Source Genre: Journal
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Publ. Info: New York : Wiley-Liss
Pages: - Volume / Issue: 46 (5) Sequence Number: - Start / End Page: 891 - 899 Identifier: ISSN: 0740-3194
CoNE: https://pure.mpg.de/cone/journals/resource/954925538149