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Abstract #1498

Phase Encoding with Bloch-Siegert effect using Parallel Transmit

Yuqing Wan1, Maolin Qiu1, Gigi Galiana1, and R. Todd Constable1,2

1Radiology & Biomedical Imaging, Yale School of Medicine, New Haven, CT, United States, 2Neurosurgery, Yale School of Medicine, New Haven, United States

A gradient-free, Bloch-Siegert effect based nonlinear spatial encoding scheme was introduced for silent scanning and to eliminate gradient-induced eddy currents in conventional MRI. We implemented a phase encoding scheme with a parallel transmit system on a 7T scanner to demonstrate feasibility. As a proof of concept, we demonstrated that B-S RF pulses can easilty produce nonlinear spatial encoding for MR imaging. The SAR limitations at 7T limit the efficiency of the encoding, but suggest the feasibility of this approach at lower fields.

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