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Abstract #2697

A novel method for video-based cardiac gating in 7T MR angiography using a video of the foot

Nicolai Spicher1, Stephan Orzada2, Stefan Maderwald2, Mark E. Ladd2,3, and Markus Kukuk1

1Department of Computer Science, University of Applied Sciences and Arts Dortmund, Dortmund, Germany, 2Erwin L. Hahn Institute for Magnetic Resonance Imaging, University Duisburg-Essen, Essen, Germany, 3Division of Medical Physics in Radiology, German Cancer Research Center, Heidelberg, Germany

In ultra-high-field MRI, cardiac gating is problematic because electrocardiography is prone to magnetohydrodynamic artifacts and pulse oximetry suffers from signal loss during long examinations. The goal of this work is to investigate practical feasibility of cardiac gating based on a video from the sole of the foot that is leaned to a glass plate. We combined this novel setup with an open-source software for video-based cardiac gating ( and performed ultra-high-field non-enhanced angiography in one volunteer. As reference, we performed pulse oximetry gating and comparison of maximum intensity projection images shows a similar image quality. Future work will evaluate the feasibility of this novel cardiac gating method in a larger cohort.

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