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Poster

Slice-Selective B1 Phase Shimming at 9.4 Tesla

MPG-Autoren
http://pubman.mpdl.mpg.de/cone/persons/resource/persons83973

Hoffmann,  J
Department High-Field Magnetic Resonance, Max Planck Institute for Biological Cybernetics, Max Planck Society;

http://pubman.mpdl.mpg.de/cone/persons/resource/persons83838

Budde,  J
Department High-Field Magnetic Resonance, Max Planck Institute for Biological Cybernetics, Max Planck Society;

http://pubman.mpdl.mpg.de/cone/persons/resource/persons84213

Shajan,  G
Department High-Field Magnetic Resonance, Max Planck Institute for Biological Cybernetics, Max Planck Society;

http://pubman.mpdl.mpg.de/cone/persons/resource/persons84145

Pohmann,  R
Department High-Field Magnetic Resonance, Max Planck Institute for Biological Cybernetics, Max Planck Society;

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Zitation

Hoffmann, J., Budde, J., Shajan, G., & Pohmann, R. (2010). Slice-Selective B1 Phase Shimming at 9.4 Tesla. Poster presented at ISMRM-ESMRMB Joint Annual Meeting 2010, Stockholm, Sweden.


Zitierlink: http://hdl.handle.net/11858/00-001M-0000-0013-C098-4
Zusammenfassung
In this work, we demonstrate B1 phase shimming in situ at 9.4 Tesla: A rapid calibration pre-scan provides B1+ magnitude and phase maps that are used to predict the total field across the subject dependent on a phase configuration of choice. In addition, a GUI provides the option to select a region within a slice where the field is quickly and reliably optimized by a simulated annealing algorithm based on a suitable optimization criterion. The accuracy of this method is demonstrated in a saline phantom and used for B1 shimming in the human brain.