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Abstract #2252

Stabilized decompositions for improved cardiac self-gating: A proof-of-concept in single breath-hold 3D cine imaging

Anna Padée1, Lorenzo Di Sopra2, John Heerfordt2,3, Jérôme Yerly2,4, Marco Merlo1, Tobias Kober2,3,5, Davide Piccini2,3,5, Matthias Stuber2,4, Christopher Roy2, and Jonas Richiardi2,3
1Laboratory for Psychiatric Neuroscience and Psychotherapy, University of Fribourg, Fribourg, Switzerland, 2Department of Radiology, Lausanne University Hospital and University of Lausanne, Lausanne, Switzerland, 3Advanced Clinical Imaging Technology, Siemens Healthcare, Lausanne, Switzerland, 4Center for Biomedical Imaging, Lausanne, Switzerland, 5LTS5, Ecole Polytechnique Fédérale de Lausanne, Lausanne, Switzerland

ECG recording during whole heart MR imaging requires extra setup time and is not always reliable. Recently, self-gated (SG) acquisition techniques have been developed, which extract the cardiac signal from k-space center amplitude modulations. Here, we investigated whether different single- (Empirical Mode Decomposition (EMD), Ensemble EMD (EEMD)) and multi-coil (PCA, ICA with novel stabilisation) decomposition methods yielded SG triggers with minimal variability to ECG R-wave location. EEMD yielded median variability similar to PCA. Compared to PCA, our proposed stabilised ICA approach yielded SG triggers with 66% lower variability (median over 5 subjects), although not for all subjects.

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