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Abstract #4034

Influence of k-space trajectory corrections on the proton density mapping precision with Ultrashort Echo Time Imaging.

Peter Latta1, Zenon StarĨuk2, Marco Gruwel3, and Boguslaw Tomanek1,4

1Central European Institute of Technology, Masaryk University, Brno, Czech Republic, 2Institute of Scientific Instruments, Academy of Sciences of the Czech Republic, Brno, Czech Republic, 3Biological Resources Imaging Laboratory, Lowy Cancer Research Centre, Sydney, Australia, 4University of Alberta, Edmonton, Canada

The ultrashort echo time (UTE) sequence is capable to provide information about tissues with short T2. On the other hand, as with all non-Cartesian data sampling schemes in general, it is sensitive to mismatching in the acquisition trajectory. This can be a potential source of errors, especially when used for quantitative applications such as proton density (PD) mapping. This problem can be reduced by calibration and correction of the k-space acquisition trajectories. The presented experiments demonstrate the importance of sampling trajectory corrections for UTE imaging, especially when applied for quantitative measurements.

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