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Abstract #1011

Designing 2D and 3D selective adiabatic pulses

Albert Jang1,2 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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