Local SAR Global SAR and Power-Constrained Large-Flip-Angle Pulses with Optimal Control and Virtual Observation Points

摘要

PurposeTo present a constrained optimal-control (OC) framework for designing large-flip-angle parallel-transmit (pTx) pulses satisfying hardware peak-power as well as regulatory local and global specific-absorption-rate (SAR) limits. The application is 2D and 3D spatial-selective 90° and 180° pulses.