Abstract #1011

Designing 2D and 3D selective adiabatic pulses

Albert Jang^1,2 and Michael Garwood¹

¹Center for Magnetic Resonance Research and Department of Radiology, University of Minnesota, Minneapolis, MN, United States, ²Department of Electrical and Computer Engineering, University of Minnesota, Minneapolis, MN, United States

Two-dimensional (2D) adiabatic pulses based on sampling k-space have previously been developed using amplitude modulation in one orthogonal direction and frequency modulation in the other². Here, a new method for designing two and three-dimensional adiabatic pulses using a sub-pulse approach is introduced. Namely, a parent adiabatic pulse is divided into sub-pulse elements, each of which is a 2D selective pulse. Using this approach, selective excitation is achieved through the 2D pulse while being adiabatically driven by the parent adiabatic pulse. This can be extended to three-dimensions by applying blips along the remaining direction between sub-pulses. Simulation and experimental results are presented, confirming the validity of this approach.

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