Navigator-Stabilized GRASE Imaging for High Magnetic Fields

Daniel Gembris¹, Anita Siebert¹, Franzisek Hennel¹

The GRASE imaging technique allows a flexible combination of gradient- and spin echoes to gather a maximum of spatial information within a single T2 decay. A source of ghosting in this technique is the combined modulation of the k-space data by the relaxation decay and resonance offsets. The original interleaved scheme of Feinberg and Oshio that converts resonance offsets to minimal pixel shifts is the most promising at high fields. We demonstrate that the ghosting due to the T2 decay (the main drawback of interleaved GRASE) can be alleviated using navigator signals.