Chao Ma1, Dan Xu2, Kevin F. King2, Zhi-Pei Liang1
1Department of Electrical and Computer Engineering, University of Illinois at Urbana-Champaign, Urbana, IL, USA; 2Applied Science Laboratory, GE Healthcare, Milwaukee, WI, USA
A new method to select optimal spoke locations for spoke trajectory based RF pulses design is presented. The problem is formulated as a combinatorial optimization problem, which is then efficiently solved using a greedy algorithm with recursive evaluation of the cost function. Simulation results and experimental results on a 3T GE Excite scanner with two-channel parallel excitation system demonstrate that the proposed method outperformed existing methods with improved computational efficiency.
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