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Abstract #2398

Optimized Amplitude Modulated Multi-Band RF pulses

Shaihan J Malik 1,2 , Anthony N Price 2 , and Joseph V Hajnal 1,2

1 Division of Imaging Sciences and Biomedical Engineering, Kings College London, London, London, United Kingdom, 2 Centre for the Developing Brain, Kings College London, London, United Kingdom

The modulation required to produce multi-band RF pulses can lead to unacceptably high peak RF power. This can be alleviated by optimising the phase of each simultaneously excited slice. The result is typically a rapid amplitude and phase modulation. Faithful reproduction of rapid phase modulation can be error prone, especially on systems requiring frequency modulation to be defined by the pulse designer. These issues can be sidestepped if pulses are amplitude modulated (AM) only; here we identify optimal slice phases that reduce peak RF power using strictly AM MB pulses and compare them with the more general solutions.

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