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Abstract #3367

Fast, Indirect Assessment of the 19F B1 Profile by 1H Bloch-Siegert B1 Mapping Using Double-Resonant 1H/19F Coils

Thomas Christian Basse-Lsebrink1, Volker Jrg Friedrich Sturm1, Anna Vilter1, Thomas Kampf1, Volker Christian Behr1, Peter Michael Jakob1

1Experimental Physics 5, University of Wrzburg, Wrzburg, Bavaria, Germany

Due to 19F properties such as high sensitivity, unambiguous localization of labeled cells and direct quantification, the MR community has regained great interest in 19F MRI. Surface coils, however, are often used due to the normally low SNR in 19F images. Since an inhomogeneous B1 profile is inherent with surface coils quantification of the 19F signal is hampered and thus strategies to map the 19F B1 profile are of great interest. The present study investigates whether or not fast 1H CPMG-based Bloch-Siegert B1 mapping of a double-resonant surface coil can enable assessment of the 19F B1 profile.