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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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