Two-dimensional frequency-swept pulse with resilience to both B₁ and B₀ inhomogeneity.

ABSTRACT: Applications of multidimensional spatially-selective pulses are sometimes limited by their long pulse durations resulting from the need to execute a modulated gradient waveform in concert with RF transmission. Here, we introduce a method to design two-dimensional selective adiabatic pulses using a Cartesian k-space trajectory. The full pulse can be sampled using various undersampled segments to create a multidimensional pulse resilient to large off-resonances. Moreover, the pulse can be designed to be resilient to B₁⁺ inhomogeneity. Experimental demonstrations of fully segmented and single-shot k-space sampling patterns are presented.

SUBMITTER: Mullen M 

PROVIDER: S-EPMC6369020 | biostudies-literature | 2019 Feb

REPOSITORIES: biostudies-literature