Daniel Gallichan1, Frederik Testud1, Christoph Barmet2, Chris A. Cocosco1, Anna M. Welz1, Klaas Prssmann2, Juergen Hennig1, Maxim Zaitsev1
1University Medical Center Freiburg, Freiburg, BW, Germany; 2Institute for Biomedical Engineering, University and ETH Zurich, Zurich, Switzerland
In this work we seek to push the limits of a custom-built gradient insert which generates the two quadratic SEMs by performing a single-shot version of a 4-Dimensional Radial In/Out (4D-RIO) trajectory which simultaneously drives the linear and quadratic encoding fields, and testing this trajectory in-vivo. A field camera was used to track the actual encoding trajectory up to 3rd order to assist image reconstruction. We were able to reconstruct reasonable quality images, both in a phantom and in the human brain in vivo, using this novel single-shot higher-order encoding trajectory.