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Abstract #2018

2D-GRAPPA Accelerated FID Based MRSI of the Brain at 7T

Bernhard Strasser1, Gilbert Hangel1, Stephan Gruber1, Siegfried Trattnig1, Wolfgang Bogner1, 2

1Department of Radiology, Medical University of Vienna, Vienna, Austria; 2Department of Radiology, Athinoula A. Martinos Center for Biomedical Imaging, Boston, MA, United States

In this work the excess signal-to-noise ratio per unit time that was provided by the use of measuring with an FID based sequence at 7T, and performing an optimized coil combination was traded for a substantial reduction in scan time, thus, enabling high resolution MRSI measurements in clinical relevant times. This trade-off was achieved by using optimized 2D-GRAPPA acceleration. The acquisition times were reduced to below four minutes with a spectral quality that is comparable to that of a more than eight times longer measurement with a volume coil. Five volunteers were measured to prove the feasibility of the method.