Keywords: Fat & Fat/Water Separation, Fat and Fat/Water Separation
Motivation: To develop B1-robust excitation pulses that can remove fat signal from images using optimal control.
Goal(s): To establish an optimal control framework for B1-robust design of water-selective excitation pulses. The pulse is optimized to excite the water signal without affecting the fat signal.
Approach: The water-selective properties of the optimal control excitation pulse are tested in a water-mineral oil phantom with controlled B1-inhomogeneities to assess performance.
Results: The optimized pulse achieves precise excitation of water within the phantom and maintains this selectivity under inhomogeneous B1-conditions. Fat magnetization is effectively unchanged by the pulse, even in the presence of B1-variations.
Impact: This work demonstrates the feasibility of designing B1-robust, water-selective excitation pulses using optimal control that leave the fat signal unexcited. Initial tests in a fat-water phantom align with simulations.
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