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Abstract #1733

Voxel Based Transmit Gain Calibration Using Bloch-Siegert Shift Method for MR Spectroscopy

Ralph Noeske1, Rolf Schulte2, Timo Schirmer2

1Research and Collaboration, GE Healthcare, Berlin, Germany; 2GE Global Research, Munich, Germany

The SNR and excitation profile achievable by a localized MR spectroscopy experiment depends on the correct setting of the transmit gain (TG) to assure that the excitation pulses have correct flip angles across the prescribed ROI. Patient dependent spatial B1+-inhomogeneities require a voxel based TG calibration method to achieve this. Automated slice based techniques can yield to B1-miscalibration degrading excitation profile when B1-sensitive pulses are used.