Abstract #0757

Optimization of a close-fitting volume RF coil using linear programming for brain imaging at 6.5 mT

Sheng Shen^1,2, Zheng Xu¹, Neha Koonjoo^2,3,4, and Matthew S. Rosen^2,3,4

¹State Key Laboratory of Power Transmission Equipment and System Security and New Technology, Chongqing University, Chongqing, China, ²MGH/A.A. Martinos Center for Biomedical Imaging, Cambridge, MA, United States, ³Department of Physics, Harvard University, Cambridge, MA, United States, ⁴Harvard Medical School, Boston, MA, United States

The use of a close-fitting roughly head-shaped volume coil for MRI has the merit of improving the SNR from the brain. However, the surface of the RF coil follows that of the head, making it difficult to determine the optimal coil winding pattern. Here, we proposed a method which combines finite element method simulation and linear programing to optimize the coil pattern of a close-fitted RF coil with the objective of maximizing its SNR and RF-magnetic-field homogeneity for operation at ultra-low field (6.5 mT, 276 kHz). We then tested the optimized coil by imaging a water-filled phantom using a 3D-bSFFP.

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