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Abstract #0605

Multiband Adiabatic Inversion Using Multiphoton Excitation

Victor Han1 and Chunlei Liu1,2
1Electrical Engineering and Computer Sciences, University of California, Berkeley, Berkeley, CA, United States, 2Helen Wills Neuroscience Institute, University of California, Berkeley, Berkeley, CA, United States

We present a technique for power-efficient multiband adiabatic inversion using the concept of multiphoton excitation. In this case, multiphoton excitation occurs with one photon from our traditional RF source and one or more photons from oscillating gradients. By a proper choice of oscillating gradients, we can meet multiphoton resonance conditions at multiple spatial locations, and thus achieve multiband multiphoton adiabatic inversions. Only a slightly scaled standard adiabatic pulse is needed on the traditional RF side. We demonstrate the technique with simulations, phantom and in vivo experiments on a 3T scanner.

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