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  Phase Variations in fMRI Time Series Analysis: Friend or Foe?

Hagberg, G., & Tuzzi, E. (2014). Phase Variations in fMRI Time Series Analysis: Friend or Foe? In T. Papageorgiou, G. Christopoulos, & S. Smirnakis (Eds.), Advanced Brain Neuroimaging Topics in Health and Disease: Methods and Applications (pp. 81-113). Rijeka, Croatia: InTech.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0027-80C7-0 Version Permalink: http://hdl.handle.net/21.11116/0000-0001-2F04-7
Genre: Book Chapter

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 Creators:
Hagberg, G1, 2, Author              
Tuzzi, Elisa, Author              
Affiliations:
1Department High-Field Magnetic Resonance, Max Planck Institute for Biological Cybernetics, Max Planck Society, Spemannstrasse 38, 72076 Tübingen, DE, ou_1497796              
2Max Planck Institute for Biological Cybernetics, Max Planck Society, Spemannstrasse 38, 72076 Tübingen, DE, ou_1497794              

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 Abstract: Functional MRI studies (fMRI) are based on the blood-oxygenation-level-dependent effect (BOLD) that arises in brain areas where neuronal activity takes place (Ogawa et al., 1990, 1993). BOLD induces changes in the local magnetic susceptibility and these can be measured by Gradient Echo (GE) Echo-Planar-Imaging (EPI). The fMRI signal thus observed consists of a complex value, which can be subdivided into a magnitude and a phase value, but in most fMRI studies the phase signal is discarded and only the magnitude changes are used to detect the activated brain areas.

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 Dates: 2014-05
 Publication Status: Published in print
 Pages: -
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 Table of Contents: -
 Rev. Method: -
 Identifiers: DOI: 10.5772/31782
BibTex Citekey: HagbergT2014
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Title: Advanced Brain Neuroimaging Topics in Health and Disease: Methods and Applications
Source Genre: Book
 Creator(s):
Papageorgiou, TD, Editor
Christopoulos, GI, Editor
Smirnakis, SM1, 2, Editor            
Affiliations:
1 Department Physiology of Cognitive Processes, Max Planck Institute for Biological Cybernetics, Max Planck Society, ou_1497798            
2 Max Planck Institute for Biological Cybernetics, Max Planck Society, Spemannstrasse 38, 72076 Tübingen, DE, ou_1497794            
Publ. Info: Rijeka, Croatia : InTech
Pages: - Volume / Issue: - Sequence Number: - Start / End Page: 81 - 113 Identifier: ISBN: 978-953-51-1203-7