Abstract #0219

Time-optimal control based RF pulse design under gradient imperfections

Christoph Stefan Aigner¹, Armin Rund², Samy Abo Seada³, Shaihan Malik³, Joseph V Hajnal³, Karl Kunisch^2,4, and Rudolf Stollberger¹

¹Institute of Medical Engineering, Graz University of Technology, Graz, Austria, ²Institute for Mathematics and Scientific Computing, University of Graz, Graz, Austria, ³Division of Imaging Sciences and Biomedical Engineering, King's College London, London, United Kingdom, ⁴Johann Radon Institute for Computational and Applied Mathematics (RICAM), Austrian Academy of Sciences, Linz, Austria

We demonstrate the joint design of minimum duration RF and slice selective gradient shapes with included gradient impulse response function (GIRF) to correct for non-ideal slice selective gradients in the pulse design. The proposed time-optimal control method designs slice selective gradient shapes with matched RF shapes for the distorted slice selective gradient. Phantom experiments on a 3T scanner validate the optimized results and demonstrate the successful correction of gradient imperfections with the proposed approach.

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