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Abstract #0517

Correcting gradient chain-induced fat quantification errors in multi-echo SoS acquisition using the gradient impulse response function

Christoph C. Zöllner1, Sophia Kronthaler1, Stefan A. Ruschke1, Holger Eggers2, Jürgen Rahmer2, Peter Börnert2, Rickmer F. Braren1, Daniela Franz1, and Dimitrios C. Karampinos1
1Department of Diagnostic and Interventional Radiology, School of Medicine, Technical University of Munich, Munich, Germany, 2Philips Research Laboratory, Hamburg, Germany

Multi-echo Stack-of-stars-type radial k-space trajectories employing golden-angle ordering have been becoming popular for abdominal fat quantification. Gradient chain imperfections including eddy currents and gradient delays are known to affect the image quality of radial imaging. Most methods for compensating radial k-space trajectory errors are based either on the acquisition of calibration lines with opposite polarity or on the processing of approximately anti‐parallel spokes from the actual radial acquisition. This work shows that a trajectory correction based on a gradient system impulse response function improves fat quantification in gated golden-angle radial Dixon imaging.

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