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Abstract #0911

B0-Robustness and Exchange Weighting of Optimal Control Pulses Compared to State of the Art Pulses for CEST Imaging

Clemens Stilianu1, Markus Huemer1, Christina Graf1, Clemens Diwoky2, Armin Rund3, Moritz Zaiss4,5, and Rudolf Stollberger1
1Institute of Biomedical Imaging, Graz University of Technology, Graz, Austria, 2Institute of Molecular Biosciences, University of Graz, Graz, Austria, 3Institute for Mathematics and Scientific Computing, University of Graz, Graz, Austria, 4Department High-field Magnetic Resonance, Max Planck Institute Tübingen, Tübingen, Germany, 5Institute of Neuroradiology, Friedrich-Alexander University Erlangen-Nürnberg, Erlangen, Germany

Synopsis

Keywords: CEST & MT, CEST & MT, Spin lock, CESLThe exchange weighting and robustness to B0-inhomogeneities are essential properties for accurate CEST-MRI saturation measurements. Therefore, we investigated these properties for a new numerical optimized saturation pulse train and for state-of-the-art saturation pulse strategies in simulation and phantom measurements. We have found that the optimized pulse train generates superior CEST contrast and has very high stability against B0-inhomogenities while maintaining the natural shape at the water peak which improves CEST-spectrum fitting and B0-correction.

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