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  T2* Mapping for TE Optimization in fMRI at Different Field Strength

Erb, M., Klose, U., & Grodd, W. (2003). T2* Mapping for TE Optimization in fMRI at Different Field Strength. Poster presented at 11th Scientific Meeting of the International Society of Magnetic Resonance in Medicine (ISMRM 2003), Toronto, ON, Canada.

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Erb, M1, Author              
Klose, U, Author
Grodd, W1, Author              
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 Abstract: Changes in oxygenated and deoxygenated haemoglobin proportions during brain activation causes susceptibility changes (T2*) and give rise to the so-called BOLD effect. The maximum of BOLD effect can be obtained at echo times corresponding to the mean T2* in each voxel. As the BOLD signal is at the same time field strength dependent it will increase with B0 [1]. We calculated T2* maps at 1.5T and 3T and found a decrease of 20ms between the main peaks in the T2* histograms (65ms/45ms). The amplitudes of BOLD effect at optimised echo times increased by 2.4 in the motor area.

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 Dates: 2003-07
 Publication Status: Published online
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Title: 11th Scientific Meeting of the International Society of Magnetic Resonance in Medicine (ISMRM 2003)
Place of Event: Toronto, ON, Canada
Start-/End Date: 2003-07-10 - 2003-07-16

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Title: 11th Scientific Meeting of the International Society of Magnetic Resonance in Medicine (ISMRM 2003)
Source Genre: Proceedings
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Pages: - Volume / Issue: - Sequence Number: 1722 Start / End Page: 339 Identifier: ISSN: 1545-4428