A Simple Method for Constrained Optimal Control RF Pulse Design

Williams, S. N. , Nielsen, J.-F., Fessler, J. A. and Noll, D. C. (2019) A Simple Method for Constrained Optimal Control RF Pulse Design. In: ISMRM 27th Annual Meeting & Exhibition, Montreal, Quebec, Canada, 11-16 May 2019,

Abstract

Optimal control (OC) methods for RF pulse design are useful in cases where the small-tip angle (STA) approximation is violated. Furthermore, designs with physically meaningful constraints (e.g., RF peak amplitude and integrated power) eliminate the need for parameter tuning to create realizable pulses. In this abstract we introduce a constrained fast OC method that easily generalizes to a variety of RF pulse designs. We demonstrate with examples of SMS and spectral prewinding pulses in simulation and in vivo. The constrained fast OC method guarantees that RF pulses will meet physical constraints while outperforming their non-OC counterparts.

• Item Type: Conference Proceedings
• Status: Published
• Refereed: Yes
• Glasgow Author(s) Enlighten ID: Williams, Dr Sydney
• Authors: Williams, S. N., Nielsen, J.-F., Fessler, J. A., and Noll, D. C.
• Subjects: Q Science > Q Science (General); Q Science > QC Physics; R Medicine > R Medicine (General); T Technology > T Technology (General)
• College/School: College of Medical Veterinary and Life Sciences > School of Psychology & Neuroscience
• Research Group: fMRI Laboratory, University of Michigan
• Copyright Holders: Copyright © 2019 ISMRM
• First Published: First published in Proceedings of ISMRM 27th Annual Meeting & Exhibition
• Publisher Policy: Reproduced with the permission of the publisher

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