Multiband RF pulse design for realistic gradient performance.

ABSTRACT:

Purpose

Simultaneous multi-slice techniques are reliant on multiband RF pulses, for which conventional design strategies result in long pulse durations, lengthening echo-times so lowering SNR for spin-echo imaging, and lengthening repetition times for gradient echo sequences. Pulse durations can be reduced with advanced RF pulse design methods that use time-variable selection gradients. However, the ability of gradient systems to reproduce fast switching pulses is often limited and can lead to image artifacts when ignored. We propose a time-efficient pulse design method that inherently produces gradient waveforms with lower temporal bandwidth.

Methods

Efficient multiband RF pulses with time-variable gradients were designed using time-optimal VERSE. Using VERSE directly on mu

SUBMITTER: Abo Seada S 

PROVIDER: S-EPMC6334175 | biostudies-literature | 2019 Jan

REPOSITORIES: biostudies-literature