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Abstract #0332

Correction of Respiratory Motion in Free-Breathing DCE-MRI using a Pilot-Tone Coil

Ruoxun Zi1, Mario Bacher2, Peter Speier2, Riccardo Lattanzi1, and Kai Tobias Block1
1Department of Radiology, New York University Grossman School of Medicine, New York, NY, United States, 2Siemens Healthcare AG, Forchheim, Germany

Synopsis

Keywords: Motion Correction, Motion Correction

Motivation: Self-navigation is commonly used for motion estimation in abdominal MRI. However, it often fails for dynamic contrast-enhanced (DCE) scans due to contrast-induced k-space changes.

Goal(s): To investigate the use of the Pilot-Tone (PT) technique for motion correction of free-breathing DCE-MRI.

Approach: A body coil with integrated PT was used for motion estimation. Validation experiments included real-time imaging and comparison with self-navigation for five post-contrast scans. One subject was scanned during contrast injection, followed by motion-weighted reconstruction using the PT data.

Results: The PT technique provides accurate respiration curves and enables motion-weighted DCE-MRI reconstruction to improve image quality and sharpness.

Impact: The PT technique offers accurate detection of respiration and enables motion-weighted reconstruction to reduce motion blurring in free-breathing DCE-MRI. It is easy to use, without need to place belts or sensors when using a body coil with integrated PT transmitter.

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Keywords