Optimized amplitude modulated multiband RF pulse design.

ABSTRACT:

Purpose

Multiband pulses are characterized by highly temporally modulated waveforms. Rapid phase or frequency modulation can be extremely demanding on the performance of radiofrequency (RF) pulse generation, which can lead to errors that can be avoided if pulses are restricted to amplitude modulation (AM) only. In this work, three existing multiband pulse design techniques are modified to produce AM waveforms.

Theory and methods

Multiband refocusing pulses were designed using phase-optimization, time-shifting, and root-flipping. Each technique was constrained to produce AM pulses by exploiting conjugate symmetry in their respective frequency domain representations. Pulses were designed using the AM and unconstrained techniques for a range of multiband factors (ie, number of

SUBMITTER: Abo Seada S 

PROVIDER: S-EPMC5697703 | biostudies-literature | 2017 Dec

REPOSITORIES: biostudies-literature