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Abstract #4329

A lightweight gradient insert coil for high resolution brain imaging

Tijl A van der Velden1, Carel C. van Leeuwen1, Erik R. Huijing1, Martino Borgo2, Peter R. Luijten1, Dennis W.J. Klomp1, and Jeroen C.W. Siero1,3

1Radiology, University Medical Center Utrecht, Utrecht, Netherlands, 2Futura Composites B.V., Heerhugowaard, Netherlands, 3Spinoza Center for Neuroimaging, Amsterdam, Netherlands

A lightweight insert gradient coil was constructed for high resolution brain imaging. The coil was designed as a single-axis unshielded coil to accelerate EPI readouts. The resulting coil weighs 45 kg and can be quickly positioned in the scanner by two persons. Theoretically, a gradient strength of 210 mT/m can be achieved with a slew rate of 1088 T*m-1*s-1 when driven at 400V/600A. In a 7 tesla scanner, an efficiency of 0.35 mT*m-1*A-1 with a slew rate of 800 T*m-1*s-1 was measured. Experiments on five healthy volunteers resulted in no experiences of nerve stimulation.

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