Keywords: RF Pulse Design & Fields, RF Pulse Design & Fields, adiabatic, outer-volume supression, black blood
Motivation: Slice selective adiabatic pre-pulses have many uses in magnetic resonance. Using gradient waveforms to create adiabatic rotations creates new ways to prepare magnetization.
Goal(s): Explore adiabatic pulse with frequency sweeps created by gradient wave forms instead of RF frequency waveforms.
Approach: Gradient swept adiabatic inversion pulses were tested with numerical Bloch simulations and on a phantom in a 3T scanner.
Results: The pulses can invert magnetization outside a well-defined non-perturbed slice. Sub-adiabatic use allows outer volume suppression, and the non-perturbed slice can be transformed into a wedge with additional constant orthogonal gradients.
Impact: A new class of adiabatic inversion pulses with frequency sweeps generated by gradient waveforms to yield inversion outside a well-defined non-perturbed slice or wedge delivers new options for pre-pulses for contrasts, spatial selection, or outer volume suppression.
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