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Abstract #5127

In-vivo Z-spectra acquisition with decreased direct saturation using adiabatic spin-lock pulses at 9.4T

Kai Herz1, Chirayu Gandhi1, Klaus Scheffler1,2, and Moritz Zaiss1

1Magnetic Resonance Center, Max Planck Institute for Biological Cybernetics, Tuebingen, Germany, 2Department of Biomedical Magnetic Resonance, University of Tübingen, Tuebingen, Germany

Off-resonant spin-lock imaging enables a lot of possibilities for T and chemical exchange (CE) sensitive applications. For this purpose, a matching amplitude of the tipping and the locking pulse is required, which can be difficult due to the high power requirements of adiabatic pulses. In this work, we present a newly shaped adiabatic half-passage pulse, usable at low power to match the amplitude of the pulses. Off- and on-resonant saturated images acquired at 9.4T are shown. The new pulse shape is able to generate robust images with comparatively low power at ultra-high-field strengths.

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