Abstract #0763

T-Hex: Spiral sampling on a tilted hexagonal grid

Maria Engel¹, Lars Kasper², Bertram Wilm^2,3, Benjamin Dietrich², Laetitia Vionnet², and Klaas Paul Pruessmann²

¹Institute for Biomedical Engineering, ETH Zurich and University of Zurich, Zürich, Switzerland, ²ETH, Zürich, Switzerland, ³Skope Magnetic Resonance Technologies, Zurich, Switzerland

In this work, we show a stack of spirals on a tilted hexagonal grid. This trajectory is used for fast 3D acquisitions with long readouts and combines the optimal hexagonal 3D sampling with the high acquisition efficiency of spirals. Isotropic 2.8 mm whole-brain coverage is achieved in 200 ms relying on cg-SENSE reconstruction, without the need for non-linear regularization.

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