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  Expected Homogeneity Gain and Hardware Requirements for Slice-Wise 3rd Order Dynamic Shim Updating for fMRI

Fillmer, A., & Henning, A. (2015). Expected Homogeneity Gain and Hardware Requirements for Slice-Wise 3rd Order Dynamic Shim Updating for fMRI. Poster presented at 23rd Annual Meeting and Exhibition of the International Society for Magnetic Resonance in Medicine (ISMRM 2015), Toronto, Canada.

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Item Permalink: https://hdl.handle.net/11858/00-001M-0000-002A-4629-2 Version Permalink: https://hdl.handle.net/21.11116/0000-0006-9B73-A
Genre: Poster

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http://www.ismrm.org/15/program_files/MonEPS04.htm (Publisher version)
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 Creators:
Fillmer, A, Author
Henning, A1, 2, Author           
Affiliations:
1Research Group MR Spectroscopy and Ultra-High Field Methodology, Max Planck Institute for Biological Cybernetics, Max Planck Society, Spemannstrasse 38, 72076 Tübingen, DE, ou_2528692              
2Max Planck Institute for Biological Cybernetics, Max Planck Society, Spemannstrasse 38, 72076 Tübingen, DE, ou_1497794              

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 Abstract: EPI allows for very fast acquisition, and is the “work horse” of conventional fMRI. To exploit the full advantage of applying ultra-high fields to fMRI, sophisticated B0 shim strategies are required. An auspicious approach for improving B0 homogeneity is DSU. As eddy-currents arise from fast switching of shim currents a careful pre-emphasis calibration is necessary. The application of pre-emphasis requires the limitation of the shim fields, which limits the homogeneity gain expected from DSU. This work compares the expected homogeneity gain from a global and a slice-wise DSU shim approach and investigates the hardware requirements for optimal slice-wise dynamic shimming.

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 Dates: 2015-06
 Publication Status: Issued
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 Identifiers: BibTex Citekey: FillmerH2015_3
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Title: 23rd Annual Meeting and Exhibition of the International Society for Magnetic Resonance in Medicine (ISMRM 2015)
Place of Event: Toronto, Canada
Start-/End Date: 2015-05-30 - 2015-06-05

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Title: 23rd Annual Meeting and Exhibition of the International Society for Magnetic Resonance in Medicine (ISMRM 2015)
Source Genre: Proceedings
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Pages: - Volume / Issue: - Sequence Number: 3211 Start / End Page: - Identifier: -