Towards uncompromised merging of 1H and 31P receive arrays for multi nuclear metabolic imaging in the brain at 7T
Ines Chavarria1,2, Dimitri Welting1, Marco Fantasia1, Quincy van Houtum1, Jannie Wijnen1, Dennis W.J. Klomp1, and Bart R. Steensma1
1Image Sciences Institute, University Medical Center Utrecht, Utrecht, Netherlands, 2University of Twente, Enschede, Netherlands
In order to optimally integrate 31P MRS and 1H MRI, a 1H birdcage coil is combined with a 16 channel dual-tuned 31P/1H receive loop array for 7T, inserted in a 31P bodycoil. 1H performance was compared to the existent NOVA head coil. Similar SAR levels and B1+ distributions were obtained, but the SNR decreased in the unshielded birdcage. SNR results might be improved upon by detuning the unshielded birdcage coil during receive mode, yet the 31P MRSI results show very high SNR. It is concluded that the unshielded birdcage coil has an adequate 1H transmit performance and has the potential for accelerated imaging with the 16 double-tuned receive loops.
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