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Abstract #2681

An insert gradient for zero-echo-time imaging with 200 mT/m at full duty cycle

Markus Weiger1, Johan Overweg2, Manuela Barbara Rösler1, Romain Froidevaux1, Franciszek Hennel1, Bertram Jakob Wilm1, Alexander Penn1, Urs Sturzenegger3, Wout Schuth4, Menno Mathlener4, Martino Borgo4, Peter Boernert2, Christoph Leussler2, Roger Luechinger1, Benjamin Emanuel Dietrich1, Jonas Reber1, David Otto Brunner1, Thomas Schmid1, Laetitia Vionnet1, and Klaas Paul Pruessmann1

1Institute for Biomedical Engineering, University and ETH Zurich, Zurich, Switzerland, 2Philips GmbH Innovative Technologies, Hamburg, Germany, 3Philips AG, Zurich, Switzerland, 4Futura Composites BV, Heerhugowaard, Netherlands

Zero-echo-time (ZTE) techniques enable imaging of tissues with very short T2s, e.g. bone or myelin. Their performance directly scales with gradient strength G, which depends on the target T2 and spatial resolution. With present-day gradients the spatial resolution for T2s on the order of 100 μs is limited to several millimetres. To improve the resolution, considerably higher gradient strengths are required. As a further challenge of ZTE sequences, the strong gradients are applied with full duty cycle. The goal of this work was to develop a gradient coil that meets these challenges, offering very high amplitude at full duty cycle.

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