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Abstract #0943

HYFI: Hybrid filling of the dead-time gap for faster zero echo time imaging

Romain Froidevaux1, Markus Weiger1, Manuela Barbara Rösler1, David Otto Brunner1, and Klaas Paul Pruessmann1

1ETH Zurich and University of Zurich, Zürich, Switzerland

MRI of tissues with short transverse relaxation times can be performed efficiently with zero echo time sequences. However, in situation involving large dead time gaps, current established techniques such as algebraic ZTE, PETRA or WASPI are not optimal because of either point spread function-related artifacts or low SNR efficiency. In this work, a novel ZTE-based MRI technique is proposed. It employs a hybrid encoding scheme with both Cartesian and radial acquisitions. In this way, SNR efficiency is improved while preserving image quality as compared to existing methods.

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