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Abstract #3337

Bloch-Siegert |B1+|-Selective Excitation Pulses

Jonathan B Martin1, Christopher E Vaughn1, Mark A Griswold2, and William A Grissom1
1Biomedical Engineering, Vanderbilt University, Nashville, TN, United States, 2Radiology, Case Western Reserve University, Cleveland, OH, United States

We present a new class of pulses which utilize the Bloch-Siegert shift to localize a |B1+| selective excitation. The summation of a far-off-resonant pulse inducing a |B1+|-dependent Bloch-Siegert shift and a frequency-selective excitation pulse excites spins depending on the strength of transmit field that they experience. The passband of the pulse can be shifted by adjusting the frequency modulation of each of the component pulses. We verify the ability of the new pulse to produce a selective excitation in simulation and on a scanner.

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