Abstract #2613

Feasibility Study: Free-Breathing 3-D CINE Imaging with Respiratory Gating Based on Pilot Tone Navigation

Jens Wetzl^1,2, Lea Schroeder¹, Christoph Forman³, Felix Lugauer¹, Robert Rehner⁴, Matthias Fenchel³, Andreas Maier^1,2, Joachim Hornegger^1,2, and Peter Speier³

¹Pattern Recognition Lab, Department of Computer Science, Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen, Germany, ²Erlangen Graduate School in Advanced Optical Technologies, Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen, Germany, ³Magnetic Resonance, Product Definition and Innovation, Siemens Healthcare GmbH, Erlangen, Germany, ⁴Magnetic Resonance, Research and Development, Hardware, Siemens Healthcare GmbH, Erlangen, Germany

Respiratory monitoring during continuous, free-breathing acquisitions is challenging. Using self-navigation, a respiratory signal can be derived from the imaging data, but requires frequent sampling of the k-space center. Pilot Tone navigation promises continuous respiratory monitoring independent of the imaging sequence. In this feasibility study, we compared both strategies for free-breathing 3-D CINE imaging. We found good agreement between both respiratory signals, and an excellent match in both reconstructed images and computed ventricular function parameters. Pilot Tone navigation can thus be considered an alternative to self-navigation, with the benefit of working with arbitrary imaging sequences.

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