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Abstract #4963

Robust and SAR-efficient whole-brain pseudo-continuous ASL at 7T

Markus Boland1, Rüdiger Stirnberg1, Eberhard Daniel Pracht1, and Tony Stöcker1,2

1German Center for Neurodegenerative Diseases (DZNE), Bonn, Germany, 2Department of Physics and Astronomy, University of Bonn, Bonn, Germany

In this work, a modified pseudo-continuous ASL sequence is presented, which reduces the SAR deposition by ~50% and provides robust labeling efficiency in the presence of off-resonances between -300Hz and 300Hz. The sequence was successfully tested on two coils with different coverage of the neck region at two labeling positions. The method allows PCASL experiments at UHF without a pre-scan in significantly reduced scan time and, therefore, exploits the advantage of UHF for perfusion imaging.

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