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Abstract #1017

IMPULSE-SMS: Local SAR and peak power optimized pTx pulse design for simultaneous multislice imaging at high fields

Mihir Pendse1 and Brian Rutt1

1Stanford University, Stanford, CA, United States

We describe an extension of the IMPULSE pTx design algorithm to enable simultaneous multislice (SMS) excitation. We introduce a strategy for integrating the optimal control method for reducing peak power in SMS with the optimization of pTx channel weightings. Desirable features of IMPULSE, including the ability to optimize spoke locations and to design pulses without SAR compression, are retained in this extension. We demonstrate that, even for large multiband acceleration factors, our approach enables design of pTx pulses that minimize local SAR while achieving acceptable in-slice homogeneity under strict peak power constraints.

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