Abstract #2447
Single-shot spiral imaging using the gradient impulse response for trajectory prediction
Signe Johanna Vannesjo 1 , Nadine N Graedel 2 , Lars Kasper 1 , Simon Gross 1 , Christoph Barmet 1,3 , and Klaas P Pruessmann 1
1
Institute for Biomedical Engineering,
University and ETH Zurich, Zurich, Switzerland,
2
FMRIB
Centre, University of Oxford, Oxford, United Kingdom,
3
Skope
Magnetic Resonance Technologies, Zurich, Switzerland
Spiral imaging theoretically yields more time-efficient
k-space coverage and increased robustness against flow
and motion compared to Cartesian acquisitions. In
practice however, the use of spiral acquisitions has
been hampered by gradient system limitations causing
deviations to the sampling trajectories. It has recently
been proposed to perform image reconstruction based on
trajectories predicted by a linear time-invariant model
of the gradient system. Here, the method is shown to
yield high-quality reconstructions of single-shot spiral
images. We furthermore show high reproducibility of the
gradient system characterization over years. The method
holds promise to yield spiral imaging feasible on
standard MR systems.
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