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Abstract #3950

8ch multi transmit with ultrasonic dual axis gradient and 32ch receive setup for fast spatial encoding at 7T

Mark Gosselink1, Aris van Ieperen1, Wout Schuth2, Martino Borgo2, Dimitri Welting1, Edwin Versteeg1, and Dennis Klomp1
1Department of Radiology, University Medical Center Utrecht, Utrecht, Netherlands, 2Futura composites, Heerhugowaard, Netherlands


We propose a setup to boost spatiotemporal encoding for MRI in the human brain using a conventional receiver array (32ch) and fast gradients (6100T/m/s). Moreover, we demonstrate that the operation frequency of a high-end gradient-amplifier can be increased to ultrasonic frequencies so to avoid unpleasant acoustic noise. By using this amplifier with 8 RF transmitters, 32 receivers and a 2-channel gradient coil, a light-weight setup is constructed for operation in a 7 Tesla MRI system. The setup is demonstrated for operation in the human brain showing good FLAIR data and no peripheral nerve stimulation at the slew rate of 6100T/m/s.

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