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Human Brain Imaging at 9.4 Tesla Using a Combination of Traveling Wave Excitation with a 15-Channel Receive-Only Array

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Hoffmann,  JO
Former Department MRZ, Max Planck Institute for Biological Cybernetics, Max Planck Society;
Max Planck Institute for Biological Cybernetics, Max Planck Society;

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Shajan,  G
Former Department MRZ, Max Planck Institute for Biological Cybernetics, Max Planck Society;
Max Planck Institute for Biological Cybernetics, Max Planck Society;

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Pohmann,  R
Former Department MRZ, Max Planck Institute for Biological Cybernetics, Max Planck Society;
Max Planck Institute for Biological Cybernetics, Max Planck Society;

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Citation

Hoffmann, J., Shajan, G., & Pohmann, R. (2011). Human Brain Imaging at 9.4 Tesla Using a Combination of Traveling Wave Excitation with a 15-Channel Receive-Only Array. In 19th Annual Meeting and Exhibition of the International Society for Magnetic Resonance in Medicine (ISMRM 2011).


Cite as: http://hdl.handle.net/11858/00-001M-0000-0013-BC16-3
Abstract
Traveling wave imaging using a Tx/Rx patch antenna has the potential to provide a more homogeneous B1+ field over a large field-of-view compared to circularly polarized volume coils. However, the method suffers from poor sensitivity which prevents the application to routine imaging. Therefore, we combined a patch antenna for transmission with a 15-channel receive-only array inside a narrow head gradient for human brain imaging at 9.4 Tesla. The setup can provide spin excitation covering the whole brain for low flip angle applications; high SNR and simple usage. However, anticipated advantages were spoiled by B1+ artifacts in our initial results.