Local SAR global SAR transmitter power and excitation accuracy trade-offs in low flip-angle parallel transmit pulse design

摘要

PurposeWe propose a constrained optimization approach for designing parallel transmit (pTx) pulses satisfying all regulatory and hardware limits. We study the trade-offs between excitation accuracy, local and global SAR, and maximum and average power for small flip-angle pTx (8 channels) spokes pulses in the torso at 3 T and in the head at 7 T.