Markus Weiger1,
David Otto Brunner1, Martin Tabbert2, Matteo Pavan1,
Thomas Schmid1, Klaas P. Pruessmann1
1Institute
for Biomedical Engineering, University and ETH Zurich, Zurich, Switzerland; 2Bruker
BioSpin MRI GmbH, Ettlingen, Germany
MRI of short T2 samples can be very efficiently performed with zero echo time (ZTE) imaging. ZTE data are incomplete in the k-space centre due to the initial RF dead time Δ, which can be addressed by algebraic reconstruction. The ZTE approach has been used for imaging T2s of several hundreds of s. Targeting even shorter T2, however, increases the bandwidth and in turn the relative ∆, and images with large ∆ generally exhibit low-frequency artefacts. Therefore, the spatial response of ZTE as a function of ∆ is investigated and the practical bandwidth limits are explored by simulations and experiments.
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