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Universal parallel transmit pulses for a 2-dimensional local excitation target pattern at 9.4T

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Geldschläger,  O
Research Group MR Spectroscopy and Ultra-High Field Methodology, Max Planck Institute for Biological Cybernetics, Max Planck Society;
Max Planck Institute for Biological Cybernetics, Max Planck Society;

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Bosch,  D
Department High-Field Magnetic Resonance, Max Planck Institute for Biological Cybernetics, Max Planck Society;
Max Planck Institute for Biological Cybernetics, Max Planck Society;

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Henning,  A
Research Group MR Spectroscopy and Ultra-High Field Methodology, Max Planck Institute for Biological Cybernetics, Max Planck Society;
Max Planck Institute for Biological Cybernetics, Max Planck Society;

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Citation

Geldschläger, O., Bosch, D., & Henning, A. (2021). Universal parallel transmit pulses for a 2-dimensional local excitation target pattern at 9.4T. Poster presented at 2021 ISMRM & SMRT Annual Meeting & Exhibition (ISMRM 2021).


Cite as: http://hdl.handle.net/21.11116/0000-0008-8678-A
Abstract
In this study, the concept of ‘Universal pTx pulses’ for local excitation is tested in vivo at 9.4T. Based on B0/B1+ maps from eight different subject heads, universal pulses for a 2-dimensional local excitation target pattern were designed. The pulses aiming to excite the visual cortex of the human brain (with a flip angle of 90 and 7 degree, respectively), while the remaining areas should experience no effective excitation. In simulations and in vivo at 9.4T, the resulting universal pules perform just slightly worse compared to the subject specific tailored pulses (on non-database heads).