Qi Duan1, Peter van Gelderen1, Jeff H. Duyn1
1Advanced MRI section, LFMI, NINDS, National Institutes of Health, Bethesda, MD, United States
This abstract investigates fast simultaneous B0/B1 mapping by Bloch-Siegert shift. Based on investigation of the source of the SAR limitation, it proposes several modifications from the original scheme to reduce such limitation while maintaining same sensitivity to the B1 field. Simultaneous B0 mapping is added into the sequence to further improve the accuracy by compensating the increased B0 sensitivity due to reduced frequency offset. The newly proposed scheme is compared to the original scheme both via simulation and in vivo demonstration.
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