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Abstract #0107

16-Channel Parallel Transmission in the Human Brain at 9.4 Tesla: Initial Results

Xiaoping Wu1, J. Thomas Vaughan1, Kamil Ugurbil1, Pierre-Francois Van de Moortele1

1CMRR, University of Minnesota, Minneapolis, MN, United States

It has been shown that parallel transmission (pTx), which consists of playing different RF pulses through independent transmit (Tx) channels, can be used to mitigate Tx B1 (B1+) nonuniformity and to achieve more homogeneous spatially selective RF excitation at high magnetic field. We have previously reported a successful implementation of Transmit SENSE in the human brain at 9.4 T with an 8 Tx channel system, which required addressing methodological issues such as k-space trajectory inaccuracies and large susceptibility induced δB0. Recently, our 9.4T system has been upgraded with a 16 Tx channel console. Here we report preliminary results of 2D (Transmit SENSE) and 3D (Spoke trajectories) pTx in the human brain at 9.4 T using a 16-channel RF coil.