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Abstract #4358

Comparison of image-based and reconstruction-based respiratory motion correction techniques for 3D whole-heart MRI

Nadia Paschke 1 , Olaf Dssel 1 , Tobias Schaeffter 2 , Claudia Prieto 2 , and Christoph Kolbitsch 2

1 Institute of Biomedical Engineering, Karlsruhe Institute of Technology, Karlsruhe, Baden-Wrttemberg, Germany, 2 Division of Imaging Sciences and Biomedical Engineering, Kings College London, London, United Kingdom

Navigator-gated acquisitions are in general used in 3D whole-heart MRI to reduce respiratory motion artefacts with the final scan time depending strongly on the breathing pattern of the subject. Motion correction approaches have been proposed to avoid these subject dependencies and ensure fast 3D high-resolution scans due to increased scan efficiency. Here two different respiratory motion correction techniques are compared in 4 volunteers and results show that incorporating motion information directly into an iterative reconstruction leads to the best image quality with a similar depiction of the coronary arteries and a scan time reduction of 43% compared to respiratory gating.

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