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  Distortion-free high-resolution fMRI at 9.4 T

Ehses, P., Budde, J., Shajan, G., & Scheffler, K. (2012). Distortion-free high-resolution fMRI at 9.4 T. In 20th Annual Meeting and Exhibition of the International Society for Magnetic Resonance in Medicine (ISMRM 2012).

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Ehses, P1, 2, Author              
Budde, J1, 2, Author              
Shajan, G1, 2, Author              
Scheffler, K1, 2, Author              
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1Department High-Field Magnetic Resonance, Max Planck Institute for Biological Cybernetics, Max Planck Society, ou_1497796              
2Max Planck Institute for Biological Cybernetics, Max Planck Society, Spemannstrasse 38, 72076 Tübingen, DE, ou_1497794              

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 Abstract: SNR benefits allow for significantly higher resolution in BOLD fMRI at ultra-high fields. On the flip side, faster T2* relaxation leads to blurring and increased B0 field inhomogeneities aggravate distortion artifacts in EPI BOLD imaging at higher fields. In this work, a single-echo gradient-echo sequence is presented, that is optimized for high BOLD SNR by combining the concept of echo-shifting with an interleaved slice order. The method is demonstrated in finger tapping experiments on a human 9.4T system. The result is a BOLD activation map with 1mm isotropic resolution virtually free from distortions.

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 Dates: 2012-05
 Publication Status: Published in print
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 Identifiers: BibTex Citekey: EhsesBSS2012
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Title: 20th Annual Meeting and Exhibition of the International Society for Magnetic Resonance in Medicine (ISMRM 2012)
Place of Event: Melbourne, Australia
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Title: 20th Annual Meeting and Exhibition of the International Society for Magnetic Resonance in Medicine (ISMRM 2012)
Source Genre: Proceedings
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Pages: - Volume / Issue: - Sequence Number: 0329 Start / End Page: - Identifier: -