Irina Brote1,2, Stephan Orzada1,2,
Andreas K. Bitz1,2, Tom Scheenen1,3, Oliver Kraff1,2,
Stefan Maderwald1,2, Mark E. Ladd1,2
1Erwin L. Hahn Institute for MRI,
Essen, Germany; 2Department of Diagnostic and Interventional
Radiology and Neuroradiology, University Hospital Essen, Essen, Germany; 3Department
of Radiology, Radboud University Nijmegen Medical Center, Nijmegen,
Netherlands
High-field
magnetic resonance spectroscopy (MRS) should provide enhanced neurochemical
information based on increased sensitivity and higher spectral resolution.
Problems arising in high-field MRI, such as B0 and B1 inhomogeneities, may
however decrease spectral resolution and SNR. Multi-channel transmit systems
have been introduced to overcome problems concerning B1 inhomogeneity. One
multi-channel transmit method is RF shimming. In this study, this method is
used for outer volume supression (OVS) at 7T in single voxel spectroscopy
(SVS) using two interleaved RF shim settings. A suppression of the outer
volume signals of more than 90% is achieved.