Abstract #3264

Bipolar time-interleaved multi-echo gradient echo imaging for high-resolution water-fat imaging

Stefan Ruschke¹, Holger Eggers², Hendrik Kooijman³, Houchun H. Hu⁴, Ernst J. Rummeny¹, Axel Haase⁵, Thomas Baum¹, and Dimitrios C. Karampinos¹

¹Department of Diagnostic and Interventional Radiology, Technische Universität München, Munich, Germany, ²Philips Research, Hamburg, Germany, ³Philips Healthcare, Hamburg, Germany, ⁴Radiology, Phoenix Children’s Hospital, Phoenix, AZ, United States, ⁵Zentralinstitut für Medizintechnik, Technische Universität München, Garching, Germany

As the spatial resolution of a multi-echo gradient-echo imaging sequence increases, the echo time step increases resulting in an increased echo time step and an echo time selection that degrades the noise performance of water-fat separation. Time-interleaved gradient echo imaging combined with bipolar (flyback) gradients can achieve reasonable echo time steps at high resolution without dramatically increasing scan time. However, bipolar gradients are associated with known phase errors problems, which can lead to fat quantification errors. The present work develops a methodology for acquiring bipolar time interleaved multi-echo gradient echo data and for correcting the relevant phase errors.

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